Arandom sample of size 15 taken from a normally distributed population revealed a sample mean of 75 and a sample variance of 25. the upper limit of a 95% confidence interval for the population mean would equal:

77.53

Step-by-step explanation:

Sample size (n) = 15

Sample mean (μ) = 75

Sample variance (V) = 25

Sample standard deviation (σ) = 5

For a 95% confidence interval, z-score = 1.960

The upper limit of the confidence interval is defined as:

Therefore, the upper limit of the 95% confidence interval proposed is 77.53.

which expression represents the approximate length of bc?

step-by-step explanation: