Suppose x has a distribution with ? = 15 and ? = 14 (a) If a random sample of size n = 39 is drawn, find ?x, ? x and P(15 ≤ x ≤ 17). (Round ?x to two decimal places
Suppose x has a distribution with ? = 15 and ? = 14
(a) If a random sample of size n = 39 is drawn, find ?x, ? x and P(15 ≤ x ≤ 17). (Round ?x to two decimal places and the probability to four decimal places.)
| ?x = |
? x =
| P(15 ≤ x ≤ 17) = |
(b) If a random sample of size n = 75 is drawn, find ?x, ? x and P(15 ≤ x ≤ 17). (Round ? x to two decimal places and the probability to four decimal places.)
| ?x = |
? x =
| P(15 ≤ x ≤ 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 one --- )larger than smaller than the same as) part (a) because of the ---Select one--- (smaller larger same)
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