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erik [133]
3 years ago
14

Fred is constructing a 95% confidence interval to estimate the average length (in minutes) of movies he watches. His random samp

le of 15 movies averaged 114 minutes long with a standard deviation of 11 minutes. What critical value and standard error of the mean should he use?
Mathematics
1 answer:
sergejj [24]3 years ago
5 0
Like what we suppose to do

like adding all together??????????
You might be interested in
Please HELP!!!!!!!!!
DaniilM [7]

1.

Calculate the sum

5x - 10 + 7 = 65 - 20x + 32

Move terms

5x - 3 = 97 - 20x

Collect the like terms and calculate

5x + 20x = 97 +3

Divide both sides by 25

25x = 100

X= 4 ANSWER

I skipped some steps because it would be too long :/

2.

Multiply parenthesis by 8

20x>8(4x - 5) -20

Calculate

20x>32x - 40 - 20

Move variable to the left

20x>32x-60

Collect like terms

20x - 32x > -60

Divide both sides by -12

-12x>-60

X<5 ANSWER

8 0
3 years ago
1248 buttons 8 contains how many buttons will go into each contain<br><img src="https://tex.z-dn.net/?f=1248%20%5Cdiv%208%20%3D%
Oksanka [162]

Answer:

156 buttons in each container

Step-by-step explanation:

\frac{1248}{8}  = 156

4 0
3 years ago
Read 2 more answers
Giovanni spent a total of $13.75 bowling. He rented bowling shoes for $2.50 and bowled 3 games. Each game cost the same amount.
irina [24]
It’s $13.75=3x-$2.50 -> $11.25=3x -> $3.75=x
X=g
7 0
3 years ago
Three weeks ago John bought stock at 491/4; today the stock is valued at 497/8. We could say the stock is performing at which of
Feliz [49]

The correct answer on my test was Above Par

4 0
4 years ago
Read 2 more answers
What value of x and y will make the polygon a parallelogram?
o-na [289]
In a parallelogram, the diagonals bisect each other.
That being the case,
6x = 72

x = 12

AND

x-5 = y
72 -5 = 67

y=67
x = 72

and the diagonals measure
144 and 134
 

5 0
3 years ago
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