Question

Microsoft MiniTab Assignment

Construct and interpret the 99 % confidence interval estimate of the population mean “WaitTime” for all customers. Type in your explanation below the output from Minitab.

Construct and interpret the 99% confidence interval estimate of the population proportion of male customers. Type in your explanation below the output from Minitab.

Is the mean “Income” for all customers no more than $38,000? Perform the appropriate hypothesis test using alpha = 0.05. Type in your explanation below the output from Minitab.

Is the proportion of American Express card transactions less than 0.3? Perform the appropriate hypothesis test using alpha = 0.05. Type in your explanation below the output from Minitab.

Data:

WaitTime	Income	Gender	Type of Card
1.6	29000	Male	Discover
6.6	32000	Female	Discover
5.6	36000	Male	Discover
5.1	65000	Female	Discover
3.9	36000	Male	Discover
4.6	33000	Female	MasterCard
6.5	31000	Male	MasterCard
6.4	41000	Female	Visa
8.6	39000	Female	Visa
4.2	33000	Female	Visa
5.8	68000	Female	MasterCard
3.4	23000	Female	MasterCard
9.3	72000	Male	Visa
7.4	52000	Female	Visa
1.8	37000	Male	Visa
11.6	46000	Female	MasterCard
5.4	29000	Male	MasterCard
4.9	36000	Male	Discover
5.4	55000	Male	Discover
1.0	27000	Male	Discover
2.5	33000	Male	MasterCard
8.3	42000	Male	MasterCard
6.1	37000	Female	American Express
6.3	31000	Female	American Express
12.1	62000	Male	American Express
10.7	69000	Female	American Express
2.9	25000	Male	American Express
12.9	80000	Male	American Express
4.7	34000	Male	American Express
3.9	42000	Male	Visa
3.2	24000	Female	Visa
12.3	79000	Male	MasterCard
2.3	76000	Female	MasterCard
8.7	37000	Male	MasterCard
4.7	36000	Female	MasterCard
3.6	59000	Male	MasterCard
2.7	27000	Male	Visa
3.7	20000	Male	MasterCard
1.0	28000	Male	MasterCard
10.2	72000	Male	MasterCard

Answer 1