In each of the following instances, determine whether you would use a z or t statistic (or neither) to form a 95 confidence interval for then look up the appropriate z or t value a Random sample of size n 21 from a normal distribution with unknown mean m and standard deviation b Random sample of si...

a For a small sample from a normal distribution with unknown standard deviation we use the t statistic For confidence coefficient 095 a 005 and a 2 00 ...

In each of the following instances, determine whether you would use a z- or t-statistic (or neither)

Question:

In each of the following instances, determine whether you would use a z- or t-statistic (or neither) to form a 95% confidence interval for μ; then look up the appropriate z or t value.

a. Random sample of size n = 21 from a normal distribution with unknown mean m and standard deviation σ

b. Random sample of size n = 175 from a normal distribution with unknown mean m and standard deviation σ

c. Random sample of size n = 12 from a normal distribution with unknown mean and standard deviation σ = 5

d. Random sample of size n = 65 from a distribution about which nothing is known

e. Random sample of size n = 8 from a distribution about which nothing is known?

Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...