An experiment was conducted to determine whether giving candy to dining parties resulted in greater tips.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 13PPS
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An experiment was conducted to determine whether giving candy to dining parties resulted in greater tips. The mean tip percentages and standard deviations are given in the accompanying table along with the sample sizes. Assume that the two samples are independent simple random samples selected from normally distributed​ populations, and do not assume that the population standard deviations are equal. Complete parts​ (a) and​ (b).
 
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Part 1
 
 
μ
n
x
s
 
No candy
μ1
36
18.61
1.39
Two candies
μ2
36
21.26
2.34

 

* find the t stat

* find the p value

* State the conclusion

* Construct a confidence interval suitable for testing the claim that the two samples are from populations with the same mean.

 

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