Question

please help with parts a-d

Researchers investigated the physiological changes that accompany laughter Ninety subjects (1834 years ) watched is designed to evoke laught. During the laughing period, the researchers measured the heart beats per minute) of each subject, with the following summary results =733.3-5. It is well known that the mean resting heart rate of adults is 71 beats permite complete parts through d below a. Setup Ho and Hfor testing whether the meant during t h e beats per minute. Choose the correct answer below OB HOy71 OA H:71 H71 06. He w71 H71 OD H71 b.f 0.10. find the reaction region for the best Choose the correct answer below OA 1645 - 145 OC 21.645 OE ) 128 -128 e Calculate the value of the best was OD F - 1545 128 -128 Round to two decimal places a ded) d. Make the appropriate conclusion Choose the correct answer below DA Root H. There is insuficient evidence the 10 level of cance to conclude that the true me heart wied e r steeds beats per minut B. Do not reject. There is s cientovidence at the 10 level of significance to conclude that the mean heart rate during code base minute C. React There is sufficient evidence at the 0.10 level of cance to conclude that the true mon t ate during our exc . 1 best porn D. Do notre There is an evidence at the 10 level of cance to conclude that the true mean heart rate during det bare

Answer 1

a)

Below are the null and alternative Hypothesis,
Null Hypothesis, H0: μ = 71
Alternative Hypothesis, Ha: μ > 71

b)

Rejection Region
This is right tailed test, for α = 0.1
Critical value of z is 1.28.
Hence reject H0 if z > 1.28

c)

Test statistic,
z = (xbar - mu)/(sigma/sqrt(n))
z = (73.3 - 71)/(5/sqrt(90))
z = 4.36

d)

Option c) is conclusion