How long does it take to have food delivered? A Chinese restaurant advertises that the average...
How long does it take to have food delivered? A Chinese restaurant advertises that the average delivery time will be no more than 30 minutes. A random sample of 16 delivery times (in minutes) showed a mean time of 28.9 minutes with a standard deviation of 6.1 minutes. Based on this sample, is the average delivery time less than 30 minutes? Use a 5% level of significance and assume that the distribution of delivery times is approximately bell-shaped.
1) What type of hypothesis test is this?
2) State the hypotheses. (Examples: mu equals 10μ=10, p greater than 0.25p>0.25. The button for muμ is in the palette to the left. Include any zeros in front of the decimal place.)
Upper H 0 :
Upper H 1 :
3) Calculate the test statistic.
4) calculate the P value.
5) what is the decision?
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