FORESTRY
AGRICULTURAL STATISTICS AND ECONOMICS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
Construct a 95% confidence interval for the population mean mu. Assume the population has a normal distribution. A sample of 20 college students had mean annual earnings of $3120 with a standard deviation of $677.
|
|
($2803, $3437)
|
|
|
($2135, $2567)
|
|
|
($2657, $2891)
|
|
|
($1324, $1567)
|
Explanation:
Detailed explanation-1: -Thus, we can obtain a 95% confidence interval for 2 as [(n−1)S222, n−1, (n−1)S221−2, n−1]=[9×3.9619.02, 9×3.962.70]=[1.87, 13.20].
There is 1 question to complete.