Using the t-distribution, the most appropriate conclusion for the hypotesis test is given by Phone use did not change.
How to find the value of z-statistic for population mean? (z test statistic)Suppose we're specified that:
The sample mean = [tex]\overline{x}[/tex]
The population mean =[tex]\mu[/tex]
The population standard deviation = [tex]\sigma[/tex]
The sample size = n
Then the z-statistic for this data is found as:
[tex]Z = \dfrac{\overline{x} - \mu}{\sigma/\sqrt{n}}[/tex]
In this problem, the values of those parameters are as follows:
The sample mean [tex]\overline{x}[/tex] = -0.2
The population mean =[tex]\mu[/tex] = 0
The population standard deviation = [tex]\sigma[/tex] = 9.1
The sample size = n = 200
Hence, the test statistic is given by:
[tex]Z = \dfrac{\overline{x} - \mu}{\sigma/\sqrt{n}}\\\\\\Z = \dfrac{-0.2- 0}{9.1/\sqrt{200}}\\\\z = 0.31[/tex]
Thus,
t = 0.31.
Since the absolute value of the test statistic is less than the critical value, we do not reject the null hypothesis and the conclusion is:
Phone use did not change.
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PLS HELP I will give Brainlyest answer!!
6. Place these activities in the correct order
Complete the Final Exam within 60 days of your enrollment start date
Complete the required Unit Assignment(s)
Complete a Unit Pretest
Request the Final Exam
Repeat for every unit
Points
0
/1
The correct order of the given activities includes:
Complete the required Unit Assignment(s)Complete a Unit PretestRequest the Final ExamComplete the Final Exam within 60 daysRepeat for every unitWhat is an Assignment, Pretest and Final Exam?An Assignment are given at end of a lecture, a Pretest give the students a preview of what to expect from a new unit while a Final Exam test their intelligence to proceed to next unit.
Therefore, the correct order are Complete the required Unit Assignment(s), Complete a Unit Pretest, Request the Final Exam, Complete the Final Exam within 60 days and Repeat for every unit.
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Whats 793861 x 672540 =
Help pls
Answer:
533903276940
Step-by-step explanation:
easy
Answer:
533,903,276,940
Step-by-step explanation:
Have a nice day/night!
Different formulas are used to find the areas of different types of triangles.
True
or
False
Answer:
true
Step-by-step explanation:
Answer:
True
Step-by-step explanation:
Depending on the angles, the size, and the form of the triangle the formula can change.
What is the mean of the following data values?
23, 79, 81, 10, 62
A. 71
B. 82
c. 62
D. 51
[tex]\rule{50}{1}\large\textsf{\textbf{\underline{Question:-}}}\rule{50}{1}[/tex]
What is the mean of the following data values? 23, 79, 81, 10, 62
[tex]\rule{50}{1}\large\textsf{\textbf{\underline{Answer and how to solve:-}}}\rule{50}{1}[/tex]
First, we add all the data values:-
[tex]\Large\text{23, 79, 81, 10, 62}[/tex]
[tex]\bigstar[/tex] On simplification,
[tex]\large\textit{255}[/tex]
[tex]\dagger[/tex] Now, divide by the number of data values (5):-
[tex]\large\text{255:5}[/tex]
[tex]\triangle[/tex] Which results in:-
[tex]\Large\textit{Mean=51 (Option D)}[/tex]
Good luck with your studies.[tex]\rule{50}{1}\smile\smile\smile\smile\smile\rule{50}{1}[/tex]
a student flips a coin four times. what is the probability the coin lands tails up exactly one time?
the probability is _____?
Answer:25% because it should do it twice well there is a 50 % chance it should
Step-by-step explanation:
Am I correct? I just really need to check and have someone explain why or why not
Answer:
yes
Step-by-step explanation:
you are correct well those are the corect ansewrs so
Answer: yes
Step-by-step explanation:
Evaluate. 33 + ( 2 3 )2 A) 9 4 9 B) 9 2 3 C) 27 2 3 D) 27 4 9
Answer:
B
Step-by-step explanation:
9 2 3
See your levels
A string of lights 4 yards long costs $9.48. What is the price per foot?
Hint: There are 3 feet in 1 yard.
$
Submit
Answer:
$0.79
Step-by-step explanation:
4 x 3 = 12
9.48/12 = 0.79
Hope this helppsssssssssssssssssssssssssssssssssssssssssssssss
Recall that in a 30 – 60 – 90 triangle, if the shortest leg measures x units, then the longer leg measures xStartRoot 3 EndRoot units and the hypotenuse measures 2x units.
(150StartRoot 3 EndRoot – 75π) ft2
(300 – 75π) ft2
(150StartRoot 3 EndRoot – 25π) ft2
(300 – 25π) ft2
Answer:
150√3- 75π) ft². if you see it
Step-by-step explanation:
Answer:
I guess it's option 1 or A
what is 123456x123456
Answer:
Well if you really want to know, it's 15241383936.
Hope this helps
Hairs was asked to evaluate the algebraic expression-3x + 6 when x=-7. 5
Answer:
28.5
Step-by-step explanation:
substitute x = - 7.5 into the expression
- 3(- 7.5) + 6 = 22.5 + 6 = 28.5
If f(x) = 3x ^3– 4x^2– 8 and g(x) = -7x^3– 8x^2+ 8, what is
-
f(x) - g(x)?
-
a.
10x^3 – 12x^2
b. 10x^3– 12x^2– 16
C. 10x^3+ 4x^2
d. 10x^3 + 4x^2 – 16
Need help asap
Answer:
d) 10x^3 + 4x^2 - 16
Step-by-step explanation:
f(x)-g(x) = (3+7)x^3 + (-4+8)x^2 + (-8-8)
Two angles of a triangle are 120° and 6º.
What is the measure of the third angle?
8 degrees
54 degrees
36 degrees
24 degrees
Answer:
54 degrees
Step-by-step explanation:
120+6= 126
180-126=54
What is the value of X?
the figure is a triangle
given angle: 52º
missing angle 1: (15x + 3)º
missing angle 2: (3x - 1) º
Answer:
just know total angle sum is 180°
Step-by-step explanation:
[tex]52 + (15x + 3) + (3x - 1) = 180 \\ 52 + 3 - 1 + 15x + 3x = 180 \\ 54 + 18x = 180 \\ 18x = 180 - 54 \\ 18x = 126 \\ x = 7[/tex]
but give me a brainliest
Answer:
x = 7
Step-by-step explanation:
→ Find the sum of the angles
52 + 15x + 3 + 3x - 1 = 18x + 54
→ Wquate the expression to 180
18x + 54 = 180
→ Solve for x
x = 7
A population of insects increases at a rate of 1. 5% per day. About how long will it take the population to double? 2. 5 days 5. 0 days 46. 6 days 66. 7 days.
which equation represents a line which is parallel to the line 7y-5x=-42?
(Help me pls as soon as possible this is due today!!!)
1. There are 20 goldfish and 30 minnows in the pond. What is the ratio of minnows to goldfish?
2. There are 15 quarters and 10 dimes in the jar. What is the ratio of quarters to dimes?
3. There are 50 stamps and 60 envelopes. What is the ratio of envelopes to stamps?
4. The store has 60 goggles and 20 flippers. What is the ratio of flippers to goggles?
5. The scale of a dinosaur mural is 1 foot for every 30 feet. If you want to draw a 90-foot dinosaur, how many feet long must it be?
6. Larry answered 8 out of every 10 questions on a test correctly. The test had 70 questions. How many correct answers did Larry give?
1) 3:2
2) 3:2
3) 6:5
4)1:3
5) 3 feet
6) 56 correct answers
A game has a spinner with 8 equal- sized sections. The results of 450 spins are shown in the table. Part Frequency 1 58 2 52 3 39 4 77 5 50 6 43 7 60 8 71
For which number is the experimental probability closest to the theoretical probability
Using it's concept, it is found that the experimental probability is closest to the theoretical probability for number 1.
What is a probability?A probability is given by the number of desired outcomes divided by the number of total outcomes.
The theoretical probability is calculated before any experiments, while the experimental probability is calculated after experiments.
Considering that the sections are equal-sized, the expected frequency for each section is given by:
Ef = 450/8 = 56.25.
The closest frequency to 56.25 is of 58, associated with number 1, which is the one that has the closest probabilities.
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What is the inverse of the function f(x) = x 3? h(x) = one-thirdx 3 h(x) = one-thirdx – 3 h(x) = x – 3 h(x) = x 3
The inverse of the function f(x) = [tex]x^{3}[/tex] is : [tex]\sqrt[3]{x}[/tex]
What is the inverse of a function?The inverse of a function is that function that acts to undo a given function.
Analysis:
if f(x) = x^{3}, then let y = [tex]x^{3}[/tex]
[tex]\sqrt[3]{y}[/tex] = [tex]\sqrt[3]{x^{3} }[/tex]
x = [tex]\sqrt[3]{y}[/tex]
Replace y with x
h(x) = [tex]\sqrt[3]{x}[/tex]
in conclusion, the inverse of h(x) = [tex]\sqrt[3]{x}[/tex]
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Ally rolls an octahedron-shaped (8-sided) die with the number 1, 2, 3, 4, 5, 6, 7, or 8 on each face. What is the probability of getting either a 1 or 8?
25%
50%
75%
45%
Answer:
25%
Step-by-step explanation:
N/2+5=3
Two step equations solve step by step
Solving the equation:-
[tex] \frac{N}{2} + 5 = 3 \\ \frac{N}{2} = 3 - 5 \\ \frac{N}{2} = ( - 2) \\ N = - 2 \times 2 \\ N = ( - 4) [/tex]
1. You want to buy one drink and some tacos. A drink
costs $2.25 and tacos cost $1.75. You have $10. Write
an inequality. How many tacos can you buy?
2
is
Given F(-7,8), G(-4,6), H(1,3), and
I(x,9). Find x such that FG I HI.
Answer:
(8,-4), (3,X)
Step-by-step explanation:
ggggggggggggggggggggggggggg
Answer:
Step-by-step explanation:
substitute each value of x and y one by one and see which one is correct.
AABC has vertices at A(1, -9), B(8,0), and C(9,-8).
Is AABC an equilateral triangle? Justify your answer.
Check the picture below.
[tex]~\hfill \stackrel{\textit{\large distance between 2 points}}{d = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2}}~\hfill~ \\\\[-0.35em] ~\dotfill\\\\ A(\stackrel{x_1}{1}~,~\stackrel{y_1}{-9})\qquad B(\stackrel{x_2}{8}~,~\stackrel{y_2}{0}) ~\hfill AB=\sqrt{[ 8- 1]^2 + [ 0- (-9)]^2} \\\\\\ AB=\sqrt{7^2+(0+9)^2}\implies AB=\sqrt{7^2+9^2}\implies \boxed{AB=\sqrt{130}} \\\\[-0.35em] ~\dotfill[/tex]
[tex]B(\stackrel{x_1}{8}~,~\stackrel{y_1}{0})\qquad C(\stackrel{x_2}{9}~,~\stackrel{y_2}{-8}) ~\hfill BC=\sqrt{[ 9- 8]^2 + [ -8- 0]^2} \\\\\\ BC=\sqrt{1^2+(-8)^2}\implies \boxed{BC=\sqrt{65}}[/tex]
now, we could check for the CA distance, however, we already know that AB ≠ BC, so there's no need.
What expression has a value of 13?
Answer:
The answer is A) 5^2 + (2 x 1) - 14
Step-by-step explanation:
Use PEMDAS ( Parentheses, Exponent, Multiply or Divide, Add or Subtract)
5^2 + (2 x 1) - 14
5^2 + 2 - 14 Do what's in the parentheses
25 + 2 - 14 Then you will do the exponent
27 - 14 Then you subtract
13
Barry ran a total of 40 miles over the course of 5 track practices. how many track practices would it take for barry to run 48 miles?
Rewrite the expression with rational exponents as a radical expression.
7 times x to the two thirds power
Answer:
[tex]7 \sqrt[3]{2} [/tex]
The net of an isosceles triangular prism is shown. What is the surface area, in square units, of the triangular prism?
104 units2
132 units2
152 units2
168 units2
Answer: Last option is correct.
Since we have given that
Dimension of central rectangle is 6 units by 7 units
So, Area of central rectangle is given by
Dimensions of upper and lower rectangle are as follows:
Length = 5 units
Breadth = 7 units
Area of upper and lower rectangle is given by
Similarly, dimensions of two triangles are as follows:
Height = 4 units
Base = 6 units
So, Area of two triangles is given by
Hence, Total surface area of the net of an isosceles prism is given by
Therefore, Last option is correct.
Answer:
152 units²
Step-by-step explanation:
Surface Area :
Area (2 triangles) + Area (2 rectangles) + Area (middle rectangle)2 x 1/2 x 6 x 4 + 2 x 8 x 5 + 8 x 624 + 80 + 4880 + 72152 units²A bucket can hold a total of 5 gallons. If the bucket is 45% full, how much water is in the bucket?
The question is an illustration of volume, and the amount of water in the bucket at 45% full is 2.25 gallons
How to determine the amount of water?The capacity of the bucket is given as:
Bucket = 5 gallons
At 45% full, we have:
Capacity = 45% * 5 gallons
Evaluate the product
Capacity = 2.25 gallons
Hence, the amount of water in the bucket at 45% full is 2.25 gallons
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