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abruzzese [7]
2 years ago
8

Hi friends anyone? here?​

Mathematics
1 answer:
tangare [24]2 years ago
4 0

Heylo! :D

How are ya? :)

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A test preparation claims that more than​ 50% of the students who take their test prep course improve their scores by at least 1
satela [25.4K]

Answer:

Step-by-step explanation:

Corresponding scores before and after taking the course form matched pairs.

The data for the test are the differences between the scores before and after taking the course.

μd = scores before taking the course minus scores before taking the course.

a) For the null hypothesis

H0: μd ≥ 0

For the alternative hypothesis

H1: μd < 0

b) We would assume a significance level of 0.05. The​ P-value from the test is 0.65. The p value is high. It increases the possibility of accepting the null hypothesis.

Since alpha, 0.05 < than the p value, 0.65, then we would fail to reject the null hypothesis. Therefore, it does not provide enough evidence that scores after the course are greater than the scores before the course.

c) The mean difference for the sample scores is greater than or equal to zero

3 0
2 years ago
SOMEONE PLEASE HELP HURRY (show work pls
ycow [4]
Answer is b. -1/2
worked it out in the pic

5 0
3 years ago
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Pherris is graphing the function f(x) = 2(3)x. He begins with the point (1, 6). Which could be the next point on his graph?
Savatey [412]

Answer: (2, 18)

Step-by-step explanation:

When x=2, f(2)=2(3)^{2}=18.

So, it should pass through (2, 18).

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When the temperature is 68°F, the speed of sound in air is approximately 343 meters per second. Approximately how many kilometer
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0.343 km in one second
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What is the metric equivalent in meters to 1250 feet?
Dvinal [7]

381 meters because you divide 1250 by 3.281 and you get 381 meters

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