Ani dont know Step-by-step explanation:
The national average for the number of students per teacher for all U.S. public schools is 15.9. A random sample of 12 school districts from a moderately populated area showed that the mean number of students per teacher was 19.2 with a variance of 4.41. Assume a normal distribution is appropriate for the number of students per teacher.a)[7 pts] Estimate the true mean number of students per teacher with 95% confidence from the random sample. b) [6 pts] A researcher makes the claim that moderately populated districts have a different number of students per teacher than the national average. Do the data support this claim
Answer:
The 95% confidence interval of the mean is
(17.8658, 20.5342)
Step-by-step explanation:
Step(i):-
Given that the mean of the Population = 15.9
Given that the size of the sample 'n' =12
Mean of the sample x⁻ = 19.2
Given that the variance of the sample = 4.41
The standard deviation of the sample (S) = 2.1
Step(ii):-
Degrees of freedom = n-1
ν = n-1 = 12-1=11
t₀.₀₅ = 2.2010
The 95% confidence interval is determined by
[tex](x^{-} - t_{0.05} \frac{S}{\sqrt{n} } , x^{-} + t_{0.05} \frac{S}{\sqrt{n} } )[/tex]
[tex](19.2 - 2.2010 \frac{2.1}{\sqrt{12} } , 19.2 + 2.2010 \frac{2.1}{\sqrt{12} } )[/tex]
(19.2 - 1.3342 , 19.2+1.3342)
(17.8658 , 20.5342)
Final answer:-
The 95% confidence interval of mean is
(17.8658 , 20.5342)
The price that Abigail paid for her snowboard, $84, is less than what Dan paid by $18. How much did Dan pay for his snowboard?
9514 1404 393
Answer:
$102
Step-by-step explanation:
Dan paid $18 more than $84:
18 + 84 = 102
Dan paid $102 for his snowboard.
Your goal is to create a college fund for your child. Suppose
you find a fund that offers an APR of 5% How much should
you deposit monthly to accumulate $170,000 in 15 years?
Answer:
the monthly payment is $636.02
Step-by-step explanation:
The computation of the monthly amount deposited i.e. PMT is given below:
GIven that
NPER = 15 × 12 months = 180
RATE = 5% ÷ 12 = 0.4167%
PV = $0
FV = $170,000
based on the above information
The formula is shown below:
= PMT(RATE;NPER;PV;FV;TYPE)
AFter applying the above formula, the monthly payment is $636.02
Find the distance on maple street, in miles, from M to P
Answer:
8
Step-by-step explanation:
Use the right triangle altitude theorem. The three triangles are right triangles and are similar.
MP/FP = FP/EP
MP/12 = 12/(EM + MP)
MP/12 = 12/(10 + MP)
MP(10 + MP) = 144
MP^2 + 10MP - 144 = 0
(MP + 18)(MP - 8) = 0
MP = -18 or MP = 8
Since a side length cannot be negative, the answer is MP = 8
Answer: 8
Find the measure of <6
Answer:
110 degrees
Step-by-step explanation:
Parallels lines, when intersected by a straight line, form congruent angles. Therefore 110 is equal to angle 6
In Exercise 7, how likely is it Mrs. Phillips will open a
can of corn? a can of peas? Explain.
Answer:ptsStep-by-step explanation:
Karen has a coupon for $1.52 off on
a package of chocolate bars. A
package normally costs $10.25, and
it has 9 chocolate bars. If Karen uses
her coupon, what will the price per
chocolate bar be?
Answer:
I believe that $0.97 would be right
Step-by-step explanation:
10.25 - 1.52 = 8.73, divide 8.73 by 9 to get 0.97
write an equation for the function graphed below. k(t)=
Answer:
I think that the equation would be Y= -2X^2-4X-4 .
Step-by-step explanation:
Hope it wad helpful :)
Simplify 11x+3y-5x-2y
Answer: 6x+y
Step-by-step explanation:
Answer:
6x + y
Step-by-step explanation:
11x + 3y - 5x - 2y
→ Simplify the x terms
6x + 3y - 2y
→ Simplify the y terms
6x + y
Indicate which formula you would use to solve for the missing side B and then write your answer correct to two decimal places.Write only the formula down.. Single line text.
Answer:
Step-by-step explanation:
Hi there,
The formula depends on what shape you are dealing with. There is no way to determine what formula you need without knowing what type of figure you are dealing with.
Factoriza el trinomio a continuación.
x2+ 5 x - 24
O A. (x-3) (x + 8)
O B. (x-8)(x+3)
O c. (x-6) (x+4)
O D. (x-4) (x+6)
Answer:a
Step-by-step explanation:
Which pair of angles are supplementary angles?
A. 33, 66
B. none of the above
C. 140, 40
D. 100, 78
Answer:
C. 140, 40
Step-by-step explanation:
Supplementary angles are two angles that add up to a sum of 180°.
140+40 = 180
show me 1/3 on a number line
Answer:
A possible number line is shown below.
Step-by-step explanation:
I-----------------I----------------I
0 1/3 1
Answer:
Step-by-step explanation:
PLEASE ANY REAL PERSON WHO CAN HELP ME IVE BEEN WAITING LIKE 30 MINUTES
Answer:
y = ½x + 8
Step-by-step explanation:
The equation of the function can be written in the slope-intercept form y = mx + b.
m = slope = change in y/change in x
b = y-intercept = the value of y when x is zero
✔️From the table, when x = 0, y is 8.
Therefore,
y-intecept (b) = 8
✔️Find the slope (m) using two of the given pairs of values from the table, (-4, 6) and (2, 9):
m = (9 - 6)/(2 -(-4))
m = 3/6
m = ½
✔️Next is to plug in the values of m and b into y = mx + b.
Thus:
y = ½x + 8
If the earth's radius is approximately 4,000 mi, what distance (in miles) is traveled by the satellite in one complete orbit? Use your calculator value of . Round your answer to two decimal places.
( NO LINKSSSSS!!!!!!!!!!!!!!!!!!!!!!!)
Answer:
radius [r]=4000mi
circumference [C]=2πr=2×π×4000mi=25132.74mi
so,it travels 25132.74mi in one complete orbit.
three of the exterior angles of an n sided polygon are 15°, 25° , 70° and the remaning exterior angles are 50°each. find the value of n
Answer:
8
Step-by-step explanation:
15+25+70+50x = 360 ( total exterior angles = 360° )
50x = 360-15-25-70
= 250
x= 5
n = 5 + 3
= 8
Solve : t+2t squared
Answer:
t=0 or t=-1/2
Step-by-step explanation:
Solve for t over the real numbers:
t (2 t + 1) = 0
Split into two equations:
t = 0 or 2 t + 1 = 0
Subtract 1 from both sides:
t = 0 or 2 t = -1
Divide both sides by 2:
Answer: |
| t = 0 or t = -1/2
Part A
Redcross Cab Taxi charges a $1.75 flat rate in addition to $0.65 per mile (m).
Katie has no more than $10 to spend on a ride.
Write an inequality that represents Katie’s situation.
Part B
How many miles can Katie travel without exceeding her limit?
A- m≤11
B- m≤12
C- m≤10
D- m≤13
Answer:
A. 10 is less than or equal to 1.75+0.65m
B. D
Step-by-step explanation:
Enter the quotient.
32)4960
Answer:0.0064516129
Step-by-step explanation:
volusia instructure.com - Private A triangle is shown below. What are the coordinates of the three vertices? 10T 9 8 -6 5 B 3 4 5 6 7 8 9 10 10-9-8-7 -6 -4-3-2 1 2 с AC 5 -6 -8 O (7,3), (-2, 3), (3,-2) 0 (-7, -3), (-2, 3), (2, -3) O (-7,-3), (3,-2), (-2,-3) (3, 7), (3, -2), (-2,3) Avection
7,3), (-2, 3), (3,-2) 0 (-7, -3), (-2, 3), (2, -3)
1: One shelf is 65cm long. Another shelf is 78cm long. What
is their total length in metres?
Answer:
1.43 Metres
Step-by-step explanation:
Since 1 Metre is equal to 100 centimetres, and 65 + 78 is 143 centimetres, to convert it to METRES we need to divide 143 by a hundred, making the output become 1.43 METRES.
The sum of the lengths of the shelves are 143 cm.
What are some alternative names for arithmetic operations?Addition is also known as the sum, subtraction is also known as the difference, multiplication is also known as the product, and division is also known as the factor.
Given, One shelf is 65cm long. Another shelf is 78cm long.
Therefore, The sum of the lengths of the two trucks would be the sum of the individual lengths of the shelf which is,
= (65 + 78) cm.
= 143 cm.
learn more about arithmetic operations here :
https://brainly.com/question/25834626
#SPJ2
PLSSS THO Write an equation that matches the graph shown below for the number of days, d, in any number of weeks, w.
Answer:
d= 7w, if you are looking for a slope intercept form
5.7x10^-3 in standard notation
7. Sydney cleans her room for 45 minutes. 'She starts at 11:13 a.m. What time does Sydney finish cleaning her room?
Answer:11:58 duh
Step-by-step explanation I can count
Answer:
SYDNEY FINISH CLEANING HER ROOM AT 11:58 a.m.
PLEASE HELP ASAP!!
Find the area of the rectangle below in terms of y. Make sure your expression is fully
simplified.
Recall, the formula for area of a rectangle is A= lw
YOU MUST SHOW ALL WORK TO RECEIVE FULL CREDIT.
Step-by-step explanation:
Area of rectangle is Length × Breadth
Where Length is 6y⁴+3y³-y²-8Width is 2y²We need to multiply these 3 terms.
[tex]\rm{2y^2 \times (6y^4 + 3y^3 - y^2 - 8)}[/tex]
Use distributive property
= 12 y⁶ + 6y⁵ - 2 y⁴ - 16 y²
Hope it helps :)
Bob asked each of 40 friends how many minutes they took to get to work.
The table shows some information about his results.
Frequency
3
8
Time taken (m minutes)
0
10
20
30
40
11
9
9
Work out an estimate for the mean time taken.
1245 :- 14 me pueden ayudar porfa
Help please !!! ❗️❗️❗️❗️❗️❗️
Step-by-step explanation:
1. f(x) = 12x + 1
f(-2) = 12(-2) + 1 = -23
f(0) = 12(0) + 1 = 1
f(3) = 12(3) + 1 = 37
2. p(x) = -8x - 2
p(-2) = -8(-2) - 2 = 14
p(0) = -8(0) - 2 = -2
p(3) = -8(3) - 2 = -26
3. m(x) = -6.5x
m(-2) = -6.5(-2) = 13
m(0) = -6.5(0) = 0
m(3) = -6.5(3) = -19.5
4. s(x) = ⅖x + 3
s(-2) = ⅖(-2) + 3 = -⅘ + 3 = 11/5
s(0) = ⅖(0) + 3 = 3
s(3) = ⅖(3) + 3 = 6/5 + 3 = 21/5
5. h(x) = ¾x - 6
h(-2) = ¾(-2) - 6 = -6/4 - 6 = -30/4
h(0) = ¾(0) - 6 = -6
h(3) = ¾(3) - 6 = 9/4 - 6 = -15/4
haha i give points plus brainiest
Answer:
Thanks you pleasentful waffle
Step-by-step explanation:
anyone help me pls:
1/9 - 3/4
Answer:
- 23/36
Step-by-step explanation:
Make sure both fractions of the denominators are the same.
1 x 4 = 4
9 x 4 = 36
3 x 9 = 27
4 x 9 = 36
Final: 4/36 - 27/36 = - 23/36
