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natta225 [31]
3 years ago
6

A recent national survey found that high school students watched an average (mean) of 7.2 movies per month with a population sta

ndard deviation of 1.0. The distribution of number of movies watched per month follows the normal distribution. A random sample of 49 college students revealed that the mean number of movies watched last month was 6.5. At the 0.05 significance level, can we conclude that college students watch fewer movies a month than high school students?
1. State the null hypothesis and the alternate hypothesis. A. H0: μ ≥ 7.2; H1: μ < 7.2
B. H0: μ = 7.2; H1: μ ≠ 7.2
C. H0: μ > 7.2; H1: μ = 7.2
D. H0: μ ≤ 7.2; H1: μ > 7.2
2. State the decision rule.
A. Reject H1 if z < –1.645
B. Reject H0 if z > –1.645
C.Reject H1 if z > –1.645
D. Reject H0 if z < –1.645
3. Compute the value of the test statistic. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.)
Value of the test statistic______________?
4. What is the p-value? (Round your answer to 4 decimal places.) ________________?
Mathematics
1 answer:
guajiro [1.7K]3 years ago
6 0

Answer:

Step-by-step explanation:

Download docx
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A store is having a sale. You can buy 14 cards for $6. What is the cost of 35 cards during this sale?
skad [1K]

Answer:

15$

Step-by-step explanation:

14=$6

35=6*35/14

15

5 0
3 years ago
A summer camp is organizing a hike and needs to buy granola bars for the campers. The granola bars come in small boxes and large
Irina18 [472]

Answer:

The Answer is: There are 8 small boxes and 9 large boxes. See explanation below for variables and variable definitions.

Step-by-step explanation:

Let s = small boxes. Let b = large boxes.

s + b = 17

You can solve for s:

s = 17 - b

You can solve for b:

b = 17 - s

10 times the number of small boxes plus 24 times the number of large boxes is equal to 296 granola bars.

10s + 24b = 296

Substitute:

10(17 - b) + 24b = 296

170 - 10b + 24b = 296

14b = 296 - 170

14b =  126

b = 126 / 14 = 9 large boxes

Find the number of small boxes, s:

s = 17 - b = 17 - 9 = 8 small boxes

There are 8 small boxes and 9 large boxes.

Proof:

10(8) + 24(9) = 296

80 + 216 = 296

296 = 296

4 0
3 years ago
Please solve for both it’s due tomorrow, easy points !
PSYCHO15rus [73]

Answer:

13. 0.145, 0.18, 0.206, 0.315

14. 1.75 times

<u><em>WARNING</em></u>

<em>im not completely sure sooo, Im really really sorry if you get it wrong</em>

8 0
3 years ago
Mr. Ramsey just finished bathing his kids, and now he is draining the tub. The tub contains 32 gallons of water and is draining
KIM [24]
The answer would be 11 gallons.

The tub starts with 32 gallons. Every minute it loses 3 gallons.

So after 1 minute it has lost 3 gallons. For example:
32-3= 29 Meaning that after 1 minute the tub has 29 gallons left.

Now you have to remember that the tub is draining for 7 minutes. So it is losing 3 gallons 7 times, because it loses 3 gallons each minute and there are 7 minutes.

We can use multiplication to find how many gallons the tub loses after 7 minutes. This sign “X” basically means “groups of”. We have 7 groups of 3, or
7 X 3

This is the same as saying we have 3, 7 times. Written like this:

3+3 +3 +3 +3 +3 +3 = 21

So after 7 minutes the tub has lost 21 gallons.

Now we take the original number of gallons and take away what was lost:

32-21=11

So there are 11 gallons left after 7 minutes.

Please let me know if you need any further explanation. Hope this helped.

7 0
2 years ago
What’s 16.0+8.49 <br> By showing work?
natka813 [3]

Answer:

24.49

Step-by-step explanation:

16.00

8.49

____

24.49

6 0
2 years ago
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