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...

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).

                            μ       n     ˜x            s
No candy          μ1   38    19.02    1.38
Two candies    μ2    38    21.56    2.37

Construct the confidence interval suitable for testing the claim in part​ a

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