took a mean of 36 days to arrive time on special orders at this fu na one-tailed test. Then comple vour intermediate computations t tate the null hypothesis H, and

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A furniture store claims that a specially ordered product will take, on average, u = 35 days (5 weeks) to arrive. The standard deviation of these waiting times is
6 days. We suspect that the special orders are taking longer than this. To test this suspicion, we track a random sample of 20 special orders and find that the
orders took a mean of 36 days to arrive. Assume that the population is normally distributed. Can we conclude at the 0.05 level of significance that the mean
waiting time on special orders at this furniture store exceeds 35 days?
Perform a one-tailed test. Then complete the parts below.
Carry your intermediate computations to three or more decimal places, and round your responses as specified below. (If necessary, consult a list of formulas.)
(a) State the null hypothesis H, and the alternative hypothesis H,.
H, :0
H, :
On
(b) Determine the type of test statistic to use.
(Choose one) ▼
D=0
OSO
(c) Find the value of the test statistic. (Round to three or more decimal places.)
O<O
(d) Find the p-value. (Round to three or more decimal places.)
(e) Can we conclude that the mean waiting time on special orders at this
furniture store exceeds 35 days?
Transcribed Image Text:A furniture store claims that a specially ordered product will take, on average, u = 35 days (5 weeks) to arrive. The standard deviation of these waiting times is 6 days. We suspect that the special orders are taking longer than this. To test this suspicion, we track a random sample of 20 special orders and find that the orders took a mean of 36 days to arrive. Assume that the population is normally distributed. Can we conclude at the 0.05 level of significance that the mean waiting time on special orders at this furniture store exceeds 35 days? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places, and round your responses as specified below. (If necessary, consult a list of formulas.) (a) State the null hypothesis H, and the alternative hypothesis H,. H, :0 H, : On (b) Determine the type of test statistic to use. (Choose one) ▼ D=0 OSO (c) Find the value of the test statistic. (Round to three or more decimal places.) O<O (d) Find the p-value. (Round to three or more decimal places.) (e) Can we conclude that the mean waiting time on special orders at this furniture store exceeds 35 days?
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