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sesenic [268]
3 years ago
12

Past experience indicates that the time re- quired for high school seniors to complete a standard- ized test is a normal random

variable with a standard deviation of 6 minutes. test the hypothesis that σ = 6 against the alternative that σ < 6 if a random sample of the test times of 20 high school seniors has a standard deviation s = 4.51. use a 0.05 level of significance.
Mathematics
1 answer:
seropon [69]3 years ago
6 0
With a standard deviation of 6 minutes, we will test the hypothesis that σ = 6 against the alternative that σ < 6 if a random sample of the test times of 20 high school seniors has a standard deviation s = 4.51. use a 0.05 level of significance. <span /><span><span>
</span></span>
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Evaluate the expression.<br> -2(12 – 2(-4))?<br> What is the value of the expression
Ksenya-84 [330]

Answer:

-40

Step-by-step explanation:

-4 * 2 = -8

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1,284 to the nearest 100 place
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HELP PLEASE HELP ME
Marina CMI [18]

Answer:

1. k≤ 26.11 hours

2. 5 ≤ x ≤ 6

Step-by-step explanation:

1.

38.76 + 2.69k ≤ 109

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k ≤ 26.11 hours

2.

19 ≤ 4 + 3x ≤ 22

15 ≤ 3x ≤ 18

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If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

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5 0
3 years ago
Pls help I need this and I don’t get it
Jobisdone [24]

Answer:

C.

Step-by-step explanation:

Hi there!

To find the answer to this, plug the number values in for n and then solve.

For the answer to be correct, the sum has to be less than 26.

Answers B and D both have numbers that would be equal to 26, so they aren’t right.

Answer A has numbers that would go over 26.

Every number in C can be added to 15 and the sum would be less than 26.

I hope this helps!

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