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le Edit View History Bookmarks Window Help ezto.mheducation.com TROYONLINE Bus Statistics & Data Analytic QM-2241-XT1B 18/T5 (Todd) connect BUSINESS STATISTICS hapter 15 Question 2 (of 2) Chicken Delight claims that 91% of its orders are delivered within 10 minutes of the time the order is placed. A sample of 90 orders revealed that 81 were delivered within the promised time. At the 0.10 significance level, can we conclude that less than 91% of the orders are delivered in less than 10 minutes? a. What is the decision rule? (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.) Reject Ho if z 1.28 b. Compute the value of the test statistic. (Negative amount should be indicated by a minus sign. Round the intermediate values and final answer to 2 decimal places.) Value of the test statistic c. What is your decision regarding the null hypothesis? Click to select) Ho T 20.91 Safari

Explanation / Answer

The statistical software output for this problem is:

One sample proportion summary hypothesis test:
p : Proportion of successes
H0 : p = 0.91
HA : p < 0.91

Hypothesis test results:

Hence,

b) Test statistic = -0.33

c) Do not reject Ho

Proportion Count Total Sample Prop. Std. Err. Z-Stat P-value p 81 90 0.9 0.030166206 -0.33149677 0.3701

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