Levels Tought:
Elementary,Middle School,High School,College,University,PHD
Teaching Since: | Jul 2017 |
Last Sign in: | 300 Weeks Ago, 4 Days Ago |
Questions Answered: | 5023 |
Tutorials Posted: | 5024 |
You are the manager of a restaurant for a  fast-food franchise. Last  month, the mean waiting time at the drive-through window for branches in your geographical  region, as measured from the time a customer places an order until the time the customer receives the  order, was 3.7 minutes. You select a random sample of 81 orders. The sample mean waiting time is 3.43 minutes, with a sample standard deviation of 0.9 minute. Complete parts  (a) and  (b) below.
Â
a. At the 0.10 level of  significance, is there evidence that the population mean waiting time is different from 3.7 minutes? State the null and alternative hypotheses.
Â
(Note: ? represents one of the following "≠, >, ≥, =, <, ≤"
____ represents an integer)
H0 : μ ? ____
H1 : μ ? ____
Â
Determine the test statistic.
The test statistic is _____
Â
Find the  p-value.
p-value = _____
Â
State the conclusion.
Note: Choose one per ( ) Â
(Do not reject, Reject, Upper) H0. There is (insufficient, sufficient) evidence to conclude that the population mean waiting time is different from 3.7 minutes.
Â
b. Because the sample size is 81 , do you need to be concerned about the shape of the population distribution when conducting the t test in  (a)? Explain. Choose the correct answer below.
A. No, because n is equal to 81 , the sampling distribution of the t test is approximately normal. In  general, the t test is appropriate for a large sample size.
B. Yes, because n is equal to 81, the sampling distribution of the t test cannot be determined. In  general, the t test is only appropriate for a normally distributed sample.
C. No, because n is equal to 81, the sampling distribution of the t test is approximately normal. In  general, the t test is appropriate for this sample size unless the population is skewed.
D. Yes, because n is equal to 81 , the sampling distribution of the t test cannot be determined. In  general, the t test requires a larger sample size.
Hel-----------lo -----------Sir-----------/Ma-----------dam----------- Â----------- -----------Tha-----------nk -----------you----------- fo-----------r y-----------our----------- in-----------ter-----------est----------- an-----------d b-----------uyi-----------ng -----------my -----------pos-----------ted----------- so-----------lut-----------ion-----------. P-----------lea-----------se -----------pin-----------g m-----------e o-----------n c-----------hat----------- I -----------am -----------onl-----------ine----------- or----------- in-----------box----------- me----------- a -----------mes-----------sag-----------e I----------- wi-----------ll -----------be -----------qui-----------ckl-----------y