Statistics-cash withdrawal analysis

Reference no: EM13110932

Cash withdrawals (in multiples of $20) at an on-campus ATM for a random sample of 30 Fridays and 30 Mondays are shown below. At alpha = .01, is there a difference in the mean ATM withdrawal on Monday and Friday?

(a) Make stacked dot plots of the data (a sketch is OK).

(b) State the hypotheses.

(d) Find the test statistic.

(e) Make a decision.

(f) Find the p-value and interpret it.

Randomly Chosen ATM Withdrawals ($)

Friday Monday

250 10 10 40 30 10

20 10 30 100 70 370

110 20 10 20 20 10

40 20 40 30 50 30

70 10 10 200 20 40

20 20 400 20 30 20

10 20 10 10 20 100

50 20 10 30 40 20

100 20 20 50 10 20

20 60 70 60 10 20

Reference no: EM13110932

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