Suppose x has a distribution with u = 15 and o = 9. n USE SALT (a) If a random sample of size n = 35 is drawn, find µ7, o z and P(15

Suppose
x
has a distribution with ? = 15 and ? = 9.

Suppose x has a distribution with u = 15 and o = 9.<br>n USE SALT<br>(a) If a random sample of size n = 35 is drawn, find µ7, o z and P(15 < x< 17). (Round o, to two decimal places and the probability to four decimal places.)<br>H =<br>P(15 <xs 17) = 0.4056<br>(b) If a random sample of size n = 61 is drawn, find µz, o, and P(15 < x< 17). (Round o , to two decimal places and the probability to four decimal places.)<br>P(15 <xs 17) =<br>(c) Why should you expect the probability of part (b) to be higher than that of part (a)? (Hint: Consider the standard deviations in parts (a) and (b).)<br>The standard deviation of part (b) is smaller than<br>V part (a) because of the larger<br>V sample size. Therefore, the distribution about uz is narrower<br>

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Jun 11, 2022

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Suppose x has a distribution with u = 15 and o = 9. n USE SALT (a) If a random sample of size n = 35 is drawn, find µ7, o z and P(15

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