Homework: Homework 8.1 MTH 240-41H Stat y Cours urse Ho mework izzes &I; (b) Ass

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Homework: Homework 8.1 MTH 240-41H Stat y Cours urse Ho mework izzes &I; (b) Assuming the normal model can be used, determine P( dy Plan Score: 0.5 of 1 pt Hw Score: 38.46%, 5 of 13 pts Asimple random sample of size n=11 isobtained from a population with =69 and ·16. (a) What must be true regarding the distribution of the population in order to use the normal this Question Help * the sampling 73.1) the normal model can be used, determine P(x 2 706) of x model to compute probabilities involving the sample mean? Assuming that (a) What must be true regarding the distribution of the population? 0 A. Since the sample size is large enough, the population distribution does not need to be normal. O B. c. The population must be normally distributed 0 D. The population must be normally distributed and the sample size must be large. Crunch: The sampling distribution must be assumed to be normal. ls for Assuming the normal model can be used, describe the sampling distributionx Choose the correct answer below. imeda OA Normal, with .69 and%"41. hase, OB. Normal, with -69 and ,-16 Normal, with X16 rson C. 16 -69 and ,- (b) P 73.1)-(Round to four decimal places as needed.) rse T Enter your answer in the answer box and then click Check Answer Clear All

Explanation / Answer

Mean = 69

SD = 16

n = 11

Using normal model:

z = (73.1 - 69)/16/11

z = 0.85

P(z < 0.85) = 0.8023

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