Suppose that you are interested in finding proportion of males that order cold brew at Starbucks. Starbucks states that 40% of males order cold brew on the regular. From a sample of 375 males at a local Starbucks, you observe that 165 ordered cold brew. You are then interested to find whether the proportion of males that order cold brew has changed.  a) State your null and alternative hypothesis.   b) Find the test statistic. Round to two decimal places.  c) Find the p-value. Round to four decimal places.   d) What is your decision at a 10% significance level.    e) What do you conclude?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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Suppose that you are interested in finding proportion of males that order cold brew at
Starbucks. Starbucks states that 40% of males order cold brew on the regular. From a
sample of 375 males at a local Starbucks, you observe that 165 ordered cold brew. You
are then interested to find whether the proportion of males that order cold brew has
changed. 

a) State your null and alternative hypothesis.

 
b) Find the test statistic. Round to two decimal places. 


c) Find the p-value. Round to four decimal places.

 
d) What is your decision at a 10% significance level. 

 
e) What do you conclude? 

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