Determine whether the results appear to have statistical​ significance, and also determine whether the results appear to have practical significance. In a study of a gender selection method used to increase the likelihood of a baby being born a​ girl, 1961 users of the method gave birth to 961 boys and 1000 girls. There is about a 20​% chance of getting that many girls if the method had no effect. 1. Does the weight loss program have statistical​ significance?A. ​Yes, the program is statistically significant because the results are unlikely to occur by chance.B. Yes, the program is statistically significant because the results are likely to occur by chance.C. No, the program is not statistically significant because the results are likely to occur by chance.D. No, the program is not statistically significant because the results are unlikely to occur by chance.2. Does the weight loss program have practical​ significance?A. Yes, the program is practically significant because the results are too unlikely to occur by chance.B. No, the program is not practically significant because the results are likely to occur even if the weight loss program has no effect.C. No, the program is not practically significant because the amount of weight lost is trivial.D. Yes, the program is practically significant because the amount of lost weight is large enough to be considered practically significant.

Step-by-step explanation:

2 hrs 45 min + 3 hrs 35 min

= 5 hrs 80 min

60 min = 1 hr

*80 min = 1 hr + 20 min

5hrs 80 min

= 5 hrs + 1 hr + 20 min

= 6 hrs 20 min

Answer:

6 hour 20 minutes

Step-by-step explanation:

Add the two time measurements separately.

2 hours  +  3 hours  =  5 hours

35 minutes  +  45 minutes  =  80 minutes

Now, simplify the measurements to the lowest terms.  You can simplify the minutes by subtracting 60 from the value.  60 minutes is 1 hour.  The number you get after subtracting is how many minutes there are.

80 - 60 = 20

80 minutes  =  1 hour 20 minutes

Now add the two measurements together.

5 hours  +  1 hour 20 minutes  =  6 hour 20 minutes

Answer:

y^1/2/xz^2 option 3

Step-by-step explanation:

(x^1/2 y^-1/4 z)^-2= x^(-1/2*2) y^(1/4*2) z^-2= x^-1 y^1/2 z^-2= y^1/2/xz^2

Answer: C y^1/2/xz^2

Step-by-step explanation:

I checked with my calculator.

Answer: the last 1/ 12 a < 18

Step-by-step explanation:

Answer:

84.13.

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the zscore of a measure X is given by:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

For this question:

[tex]\mu = 143, \sigma = 8[/tex]

What percentage of homes will have a monthly utility bill of more than $135?

This is 1 subtracted by the pvalue of Z when X = 135. So

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{135 - 143}{8}[/tex]

[tex]Z = -1[/tex]

[tex]Z = -1[/tex] has a pvalue of 0.1587

1 - 0.1587 = 0.8413

84.13% of homes will have a monthly utility bill of more than $135. Excluding the percentage, the answer is 84.13.

Answer:

x=3

Step-by-step explanation:

[tex]3x^{2}[/tex]-7x-6=0

9x-7x-6=0

=9x-7x=0+6=6

2x=6

x=6/2=3

Answer:

The percentage of hotels with rates between 120 and 144 euros is 84%.

Step-by-step explanation:

We know that the distribution of the nightly rate for a hotel in Rome is bell shaped with a mean of 138 euros and a standard deviation of 6 euros.

We want to know the proportion of hotels between 120 and 144 euros.

We can approximate the distribution to a normal distribution and calculate the z-score for both boundaries:

[tex]z_1=\dfrac{X_1-\mu}{\sigma}=\dfrac{120-138}{6}=\dfrac{-18}{6}=-3\\\\\\z_2=\dfrac{X_2-\mu}{\sigma}=\dfrac{144-138}{6}=\dfrac{6}{6}=1[/tex]

Then, we can calculate the proportion as the probability of having rates between 120 and 144:

[tex]P=P(120<X<144)=P(-3<z<1)\\\\P=P(z<1)-P(z<-3)\\\\P=0.8413-0.0013\\\\P=0.8400[/tex]

Then, we can conclude that the percentage of hotels with rates between 120 and 144 euros is 84%.

Answer:

x=24.8

Step-by-step explanation:

Answer:

Step-by-step explanation:

Answer:

A.)359.2, B.)2.5 uf

Step-by-step explanation:

E / I = R

208 / 1.04 = 200 ohms

2*pi*f*L = Xl

6.28*400*.143 = 359.2 ohm

1 / (2*pi*f*Xc) = c

1 /(6.28*400*159.2) = 2.5 uf

Answer:

1.9730677676839334 or 1.97 (rounded)

Step-by-step explanation:

102-43=59

Answer:

the correct option is d. 0.02

Step-by-step explanation:

We have the following events:

x: A drought occurd

y: Water rationing.

Therefore, according to the plaster we have:

P [x] = 0.20

P [y | x] = 0.10

Now P [it is a drought and water rationing happens] =

P [x n y] = P [y | x] * P [x] = 0.10 * 0.20 = 0.02

Which means that the correct option is d. 0.02

Answer:

Step-by-step explanation:

a ) the graph for a) is attached

y= -2x+5

when x=0, y=5 and when y=0, x=2.5

b) 4x-3y+9=0

  -3y= -9-4x

      y= 4/3 x+3

Answer:

The probability that Joe will be accepted at one, and only one, university is 0.45 or 45%.

Step-by-step explanation:

We are given that Joe is considering pursuing an MBA degree. He has applied to two different universities.

The acceptance rate for applicants with similar qualifications is 25 percent for University A and 40 percent for University B.

Let the probability that Joe will be accepted for University A = P(A) = 0.25

Probability that Joe will be accepted for University B = P(B) = 0.40

Now, Probability that Joe will be accepted at one, and only one, university is given by ;

Accepted for University A but not for University B + Accepted for University B but not for University A

=  [P(A) [tex]\times[/tex] (1 - P(B))] + [P(B) [tex]\times[/tex] (1 - P(A))]

=  (0.25 [tex]\times[/tex] 0.60) + (0.40 [tex]\times[/tex] 0.75)

=  0.15 + 0.30 = 0.45

Hence, the probability that Joe will be accepted at one, and only one, university is 0.45.

The probability that Joe will be accepted at one, and only one, university is 0.45 or 45%.

Let us assume the probability that Joe will be accepted for University A = P(A) = 0.25

Now

Probability that Joe will be accepted for University B = P(B) = 0.40

Now,

= Accepted for University A but not for University B + Accepted for University B but not for University A

=  [P(A)  (1 - P(B))] + [P(B)  (1 - P(A))]

=  (0.25  0.60) + (0.40  0.75)

=  0.15 + 0.30

= 0.45

Learn more about probability here: https://brainly.com/question/795909?referrer=searchResults

Answer:

Step-by-step explanation:

The information given in the question can be represent in a table format for better understanding with the additional columns as follows:

Items          Weights Q₀         Prices P₀      Prices P₁        P₀Q₀        P₁Q₀

Cashew        1                        $12.50           $17.00        $12.50      $17.00

Pecans         1                         $4.00            $4.00         $4.00        $4.00

Almonds       1                         $5.50           $3.00          $5.50        $3.00

Total                                                                                 $22           $24

Can you say what happened to the overall "price level"?

The changes in overall price level can be a result of a condition termed as inflation rate

How might you construct a measure of the "change in price level"?

To construct a measure of the change in price level; we need to determine the consumer price index (CPI).

The consumer price index can be determined by using the relation:

[tex]=\mathbf{\dfrac{Sum \ of \ P_1Q_0}{Sum \ of \ P_oQ_o}*100 }[/tex]

[tex]= \mathbf{\dfrac{24}{22}*100 }[/tex]

= 109.0%

consumer price index (CPI) is 109.0% ; This implies that there is a 9.9% inflation in the economy.

Answer:

$75.58

The amount spent of $75.58 is most likely an outlier

Step-by-step explanation:

An outliers are unusual values in a dataset, they are data values that are extremely higher or extremely lower when compared to the other values in a data (data points that are far from other data points)

For the case above, give a dataset;

$32.92 $14.14 $30.80 $28.34 $75.58 $36.33 $33.51 $22.94

$75.58 is extremely far from other value. So $75.58 is an outlier in the given dataset.

Answer:

P = 10z + 10 units.

Step-by-step explanation:

To find the perimeter of a rectangle, you can use the formula P = 2l + 2w.

If one side is '3z + 2' and the other is '2z + 3', we can plug these into the equation:

P = 2(3z + 2) + 2(2z + 3).

Distributing the 2's gives us:

P = 6z + 4 + 4z + 6

Combine like terms, resulting in the final answer:

P = 10z + 10 units.

Answer:

{-4,-1,1,4,7,8,15,18}

Step-by-step explanation:

The range of this function is a universal set that contains all elements of each set

And is;

{-4,-1,1,4,7,8,15,18}

Answer: its actually (-4, 1, 7, 15)

Step-by-step explanation:

Answer: 35

Step-by-step explanation: Let me know if you need an explanation.

Answer:

37

Step-by-step explanation:

Split and fill the difference

33 black

30 red

there is only a difference of three so you'll need to add and take a total of 4. to make up for the needed difference for 7.

33+2=35 black

30-2=28 red

Answer:

volume = 36 cm³

Step-by-step explanation:

The volume of a rectangular prism = lwh

where

w = width

l = length

h = height

The base of a rectangular prism is a rectangle and the area of a rectangle is the product of length and width. Therefore,

base area of the rectangular prism = length × width

base area = lw

Base area of the rectangular prism =  12 cm²

Recall, the formula of the volume of a rectangular prism is the product of the length, width and height.

volume  = lwh

substitute lw value in the formula above

volume = 12 × 3

volume = 36 cm³

Answer:

Jamal travels at a speed of 5 mph and Diego travels at a speed of 12 mph.

Step-by-step explanation:

Jamal's speed is of x mph.

Diego's speed is of (x + 7) mph.

Opposite directions.

This means that each hour, they will be x + x + 7 = 2x + 7 miles apart.

After 4 hours they are 68 miles apart, how fast is each traveling?

Using a rule of three.

1 hour - 2x + 7 miles apart.

4 hours - 68 miles apart.

[tex]4(2x + 7) = 68[/tex]

[tex]8x + 28 = 68[/tex]

[tex]8x = 40[/tex]

[tex]x = \frac{40}{8}[/tex]

[tex]x = 5[/tex]

Jamal travels at a speed of 5 mph and Diego travels at a speed of 12 mph.

x = # of CDs Walter has

3x - number of CDs Brian has

144 - total

x + 3x = 144

4x = 144

x = 144/4

x = 36

Answer: D. 36

Answer:

D.36

Step-by-step explanation:

X+3X=144

4X=144 (THEN DIVIDE BOTH SIDES B 4)

X=144/4=36

Answer:

1. The chi-squared statistic = 10.36

The degrees of freedom = 17

The p-value for the test = 0.89

2. The range of the p-value from the Chi squared table = 0.75 < p-value < 0.90

Step-by-step explanation:

1. The Chi squared test is given as follows;

[tex]\chi ^{2} = \sum \dfrac{\left (Observed - Expected \right )^{2}}{Expected }[/tex]

Therefore,

                              UTI   No UTI    %     Total

Cranberry juice       8           42      84     50

Lactobacillus          19          30       61     49

Control                    18          30      60    50

The chi-squared statistic is given as follows;

[tex]\chi ^{2} = \dfrac{\left (8- 18\right )^{2}}{18} + \dfrac{\left (42 - 30\right )^{2}}{30} = 10.36[/tex]

The chi-squared statistic = 10.36

The degrees of freedom, df = 18 - 1 = 17 since the all of the expected count have a minimum value of 18

With the aid of the calculator we find the p value as p as follows;

[tex]p = 0.9 - \dfrac{10.36 - 10.085}{12.972 - 10.085} \times (0.9 - 0.75)[/tex]

The p-value for the test = 0.89  

2. The range of the p-value from the Chi squared table is given as follows;

0.75 < p-value < 0.90.

Answer:

The 95% confidence interval for the true proportion of all medical students who plan to work in a rural community is (0.0525, 0.1075).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of [tex]\pi[/tex], and a confidence level of [tex]1-\alpha[/tex], we have the following confidence interval of proportions.

[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

In which

z is the zscore that has a pvalue of [tex]1 - \frac{\alpha}{2}[/tex].

For this problem, we have that:

[tex]n = 375, \pi = \frac{30}{375} = 0.08[/tex]

95% confidence level

So [tex]\alpha = 0.05[/tex], z is the value of Z that has a pvalue of [tex]1 - \frac{0.05}{2} = 0.975[/tex], so [tex]Z = 1.96[/tex].

The lower limit of this interval is:

[tex]\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.08 - 1.96\sqrt{\frac{0.08*0.92}{375}} = 0.0525[/tex]

The upper limit of this interval is:

[tex]\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.08 + 1.96\sqrt{\frac{0.08*0.92}{375}} = 0.1075[/tex]

The 95% confidence interval for the true proportion of all medical students who plan to work in a rural community is (0.0525, 0.1075).

Step-by-step explanation:

Given that n! = n(n - 1)(n - 2)(n - 3)...2×1

We want to show that 2n - 1 ≤ n!

Since

n! = n(n - 1)(n - 2)(n - 3)...2×1

= n(n - 1)!

n! = n(n - 1)(n - 2)!

n! = (n² - n)(n - 2)!

From here obviously,

n! ≥ n

n! ≥ 2n

And

n! ≥ 2n - 1

Which implies

2n - 1 ≤ n!

Answer:

Nitrogen

Step-by-step explanation:

Nitrogen and oxygen are by far the most common; dry air is composed of about 78% nitrogen (N2) and about 21% oxygen (O2). Argon, carbon dioxide (CO2), and many other gases are also present in much lower amounts; each makes up less than 1% of the atmosphere's mixture of gases. Hope this helped!

The complete question is;

Instructions:Select the correct answer from each drop-down menu.

The side length of the square in the figure is 8 cm.

The radius of the inscribed circle is [ (32)^(1/2), 16, 4, 32 ] cm, and the radius of the circumscribed circle is [ (32)^(1/2), 2(32)^(1/2), (128)^(1/2), 128 ] cm.

Image is attached.

Answer:

Radius of inscribed circle = 4 cm

Radius of circumscribed circle = 32^(1/2) cm

Step-by-step explanation:

The square has a side of 8cm.

Thus,the diameter of the inscribed circle would be same as a side of the square.

So, if diameter = 8cm, then, radius of inscribed = 8/2 = 4cm

Now, to the circumscribed circle, the diagonal of the square would be the diameter of the circumscribed circle. It can be calculated with Pythagoreas theorem.

So, d² = 8² + 8²

d² = 64 + 64

d² = 128

d = √128

Expressing it in surd form gives;

d = √32 x √4

d = 2√32 cm

So radius of circumscribed circle = (2√32)/2 = √32 cm or 32^(1/2) cm

Answer:

4 and 32^1/2

Step-by-step explanation:

i just did it on plato :))

Answer:

The point in which the graph crosses the x-axis is called the x-intercept and the point in which the graph crosses the y-axis is called the y-intercept.

Step-by-step explanation:

The x-intercept is found by finding the value of x when y = 0, (x, 0), and the y-intercept is found by finding the value of y when x = 0, (0, y).

Answer:

[tex] \bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}}) [/tex]

And the standard deviation for the sample mean would be given by:

[tex] \sigma_{\bar X}= \frac{1.5}{\sqrt{25}}= 0.3[/tex]

Step-by-step explanation:

For this case we know that the amount of cheese inserted into the ravioli is normally distributed. And we have the following info given;

[tex] \bar X =15[/tex] the sample mean

[tex]s= 1.5[/tex] the sample deviation

[tex] n=25[/tex] the sample size

And for this case we know that the sample size is large enough in order to apply the central limit theorem and the distribution for the sample mean would be given by:

[tex] \bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}}) [/tex]

And the standard deviation for the sample mean would be given by:

[tex] \sigma_{\bar X}= \frac{1.5}{\sqrt{25}}= 0.3[/tex]

Answer:

It would be B = Triangle because look where it’s cut sliced in half in a piece on top , it has three angles and a triangle has three angles so it’s B , Hope this helped :) brainliest will be appreciated