Suppose x has a distribution with u = 15 and o = 11. A USE SALT (a) If a random sample of size n = 44 is drawn, find , o - and P(15 sis 17). (Round o, to two decimal places and the probability to four decimal places.) P(15 sxs 17) = (b) If a random sample of size n = 72 is dravin, find , a- and P(15 sxs 17). (Round o - to two decimal places and the probability to four decimal places.) P(15 sxs 17) (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).) The standard deviation of part (b) is -Select-- v part (a) because of the -Select- V sample size. Therefore, the distribution about u- is -Select--

Question

(A), (B) and (C)

Suppose x has a distribution with u = 15 and o = 11.
A USE SALT
(a) If a random sample of size n = 44 is drawn, find , o - and P(15 sis 17). (Round o, to two decimal places and the probability to four decimal places.)
P(15 sxs 17) =
(b) If a random sample of size n = 72 is dravin, find , a- and P(15 sxs 17). (Round o - to two decimal places and the probability to four decimal places.)
P(15 sxs 17)
(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).)
The standard deviation of part (b) is -Select-- v part (a) because of the -Select- V sample size. Therefore, the distribution about u- is -Select--
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Transcribed Image Text

Suppose x has a distribution with u = 15 and o = 11. A USE SALT (a) If a random sample of size n = 44 is drawn, find , o - and P(15 sis 17). (Round o, to two decimal places and the probability to four decimal places.) P(15 sxs 17) = (b) If a random sample of size n = 72 is dravin, find , a- and P(15 sxs 17). (Round o - to two decimal places and the probability to four decimal places.) P(15 sxs 17) (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).) The standard deviation of part (b) is -Select-- v part (a) because of the -Select- V sample size. Therefore, the distribution about u- is -Select--

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