Given the null and alternative hypotheses, sample means, sample sizes, and population standard deviations shown to the right, conduct a hypothesis test using an alpha level equal to 0.01. h0: u1 - u2 > 0  h1: u1 - u2 < 0 x1= 149         x2 = 139 o1= 17.          o2=13 n1=45           n2= 55 Determine the rejection region for the test statistic z. Select the correct choice below and fill in the answer box to complete your choice. (Round to two decimal places as needed.) a   z<.      or. x> b   z> c   z< Calculate the value of the test statistic. z = (Round to two decimal places as needed.) Since the test statistic (1) in the rejection region, (2) the null hypothesis. There is (3) (1) is not is evidence to conclude that the mean of population 1 is less than the mean of population 2. 1) is not       2) reject                       3) insufficient is                      do not reject                       sufficient

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter12: Probability
Section12.4: Discrete Random Variables; Applications To Decision Making
Problem 9E
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Given the null and alternative hypotheses, sample means, sample sizes, and population standard deviations shown to the right, conduct a hypothesis test using an alpha level equal to 0.01.

h0: u1 - u2 > 0 

h1: u1 - u2 < 0

x1= 149         x2 = 139

o1= 17.          o2=13

n1=45           n2= 55

Determine the rejection region for the test statistic z. Select the correct choice below and fill in the answer box to complete your choice.

(Round to two decimal places as needed.)

a   z<.      or. x>

b   z>

c   z<

Calculate the value of the test statistic.
z = (Round to two decimal places as needed.)

Since the test statistic (1) in the rejection region, (2) the null hypothesis. There is

(3)

(1) is not is

evidence to conclude that the mean of population 1 is less than the mean of population 2.

1) is not       2) reject                       3) insufficient

is                      do not reject                       sufficient

 

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