uppose x has a distribution with a mean of 40 and a standard deviation of 21. Random samples of size n = 36 are drawn. a) Describe the x̅ distribution. x̅ has a geometric distribution x̅ has a Poisson distribution. x̅ has an unknown distribution x̅ has a normal distribution x̅ has an approximately normal distribution x̅ has a binominal distr
Suppose x has a distribution with a mean of 40 and a standard deviation of 21. Random samples of size n = 36 are drawn.
a) Describe the x̅ distribution.
x̅ has a geometric distribution
x̅ has a Poisson distribution.
x̅ has an unknown distribution
x̅ has a
x̅ has an approximately normal distribution
x̅ has a binominal distribution
Compute the mean and standard deviation of the distribution. (For each answer, enter a number)
ux̅ =
ox̅ =
b) Find the z value corresponding to x̅ = 47 (Enter an exact number)
z =
c) Find P(x̅ < 47) =
d) Would it be unusual for a random
Yes, it would be unusual because less than 5% of all such samples have means less than 47
Yes, it would be unusual because more than 5% of all such samples have means less than 47
No, it would not be unusual because more than 5% of all such samples have means less than 47
No, it would not be unusual because less than 5% of all such samples have means less than 47
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