The pooled variance is used to calculate the test statistics for comparing two population means when the population variances are assumed to be unequal.
Indicate whether the statement is true or false
Q. 2Bananas are sold in bunches at a grocery store and typically consist of 4-8 bananas per bunch. Suppose the weight of these bunches follows a normal distribution with a mean of 3.54 pounds and a standard deviation of 0.63 pounds.
What is the probability that a randomly selected bunch of bananas will weigh more than 3.0 pounds?A) 0.5398
B) 0.6950
C) 0.8051
D) 0.9463
Q. 3When testing for the population mean when sigma is known and a sample size is greater than 30, the population must be normally distributed in order for the conclusions to be reliable.
Indicate whether the statement is true or false
Q. 4________ probability is the probability of Event A occurring knowing that Event B has already occurred.
A) Joint
B) Conditional
C) Prior
D) Marginal
Q. 5The pooled variance is the weighted average of two sample variances drawn from two populations.
Indicate whether the statement is true or false
Quick Reply
