Use the standard normal distribution or the t dstibution to construct a 90% confidence interval tor the population mean Justly your decison neher dntuhon can be uned explain why Interpret the results In a recent seaon, the population standard deviation of the yards per carry for all nunning backs was1 34 The yans per cary of 25 randomly seleced running backs are shown below Assume the yards per cary are normaly destributed 16 71 66 25 62 27 34 38 61 53 66 65 37 57 33 58 22 35 17 55 65 37 64 31 Which distribution should be used to construct the confidence interva OA Use atdstributon becausen-30 and es unknown OB Use atdstribution because n 30 and e is known OC Use a normal distribution because n30, the data are normaly distributed and eis unanown OD. Use a nomal distribution because e is known and the data are normally distributed OE Canot use the standard normal dntribution or the t-distributon because es unknown a-30 and the daa are not omaly distrtufed

Q: メ+1

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