Author Question: One characteristic of paired variables is that: a. one variable is a negative value and the other ... (Read 80 times)

Davideckstein7 · **on:** Jun 24, 2018

One characteristic of paired variables is that:
a. one variable is a negative value and the other is a positive value
b. both variables are positive values
c. each variable has the same number of observations
d. each variable has a different number of observations

Question 2

A random 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:
a. 77.77
b. 72.23
c. 88.85
d. 77.27