1. The average take-out order size for Ashoka Curry House restaurant is shown. A
ID: 3061001 • Letter: 1
Question
1. The average take-out order size for Ashoka Curry House restaurant is shown. Assuming equal variances, at = 0.05, is there a significant difference in the order sizes?
(a) Specify the decision rule. (A negative value should be indicated by a minus sign. Round your answers to 3 decimal places.)
Reject the null hypothesis if tcalc > _____ or tcalc < _____.
(b) Find the test statistic tcalc. (A negative value should be indicated by a minus sign. Do not round your intermediate values and round your final answer to 4 decimal places.)
tcalc
(c) Use Excel to find the p-value. (Round your answer to 4 decimal places.)
p-value
2. A ski company in Vail owns two ski shops, one on the west side and one on the east side of Vail. Ski hat sales data (in dollars) for a random sample of 5 Saturdays during the 2004 season showed the following results. Is there a significant difference in sales dollars of hats between the west side and east side stores at the 10 percent level of significance?
State the decision rule for a 5 percent level of significance. (Round your answers to 3 decimal places.)
Find the test statistic tcalc. (Round your answer to 2 decimal places. A negative value should be indicated by a minus sign.)
3. A cognitive retraining clinic assists outpatient victims of head injury, anoxia, or other conditions that result in cognitive impairment. Each incoming patient is evaluated to establish an appropriate treatment program and estimated length of stay. To see if the evaluation teams are consistent, 12 randomly chosen patients are separately evaluated by two expert teams (A and B) as shown.
(a) Specify the decision rule at the .10 level of significance.(Round your answers to 3 decimal places. A negative values should be indicated by a minus sign.)
Reject the null hypothesis if the p-value is (greater than or less than) 0.10 or if tcalc < _____ or tcalc > _____.
(b) Find the test statistic tcalc. (Round your answer to 3 decimal places. A negative value should be indicated by a minus sign.)
tcalc
(c) Find the p-value. (Round your answer to 3 decimal places. A negative value should be indicated by a minus sign.)
p-value
Customer Order Size Statistic Friday Night Saturday Night Mean order size = 22.49 = 24.71 Standard deviation s1 = 4.57 s2 = 6.14 Number of orders n1 = 15 n2 = 20Explanation / Answer
1.
a. Alpha = 0.05
Reject the null hypothesis if tcalc > t critical
Or P-value < alpha we reject the null hypothesis.
b.
Usining Minitab:
Two-Sample T-Test and CI
Sample N Mean StDev SE Mean
1 15 22.49 4.57 1.2
2 20 24.71 6.14 1.4
Difference = mu (1) - mu (2)
Estimate for difference: -2.22
95% CI for difference: (-5.91, 1.47)
T-Test of difference = 0 (vs not =): T-Value = -1.23 P-Value = 0.2276 DF = 32
c. P-valu 0.2276 ====>>> use excl function =TDIST(1.23,32,2)
Hope this will be helpful. Thanks and God Bless you:) Please post remaining questions saperately.
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