Under what conditions can the t-distribution be correctly employed to test the difference between two population means?
A) When the samples from the two populations are small and the population variances are unknown
B) When the two populations of interest are assumed to be normally distributed
C) When the population variances are assumed to be equal
D) All of the above
Question 2
In determining the sample size requirement for an application involving the estimation of the proportion of department store customers who pay using the store's credit card,
the closer the true proportion is to .5, the larger will be the required sample size for a given margin of error and confidence level.
Indicate whether the statement is true or false
Winter distribution of the American crow, Corvus brachyrynchos.
Frequency distribution curve: interpatient variability in drug response.
Most vehicles will be correctly positioned when the left front tire is centered on the tire pad.
The Frequency Distribution Curve of a Drug
IQ scores form what mathematicians call a normal distribution "bell curve"