________ data provides information about an individual's personality, attitudes, lifestyle, and other psychological characteristics

Sandy's Stores is a small chain of grocery stores located in a few neighboring towns. The stores have always been largely self-service, but the company is considering making a switch to full-service stores

Offer reasons why Sandy's should stick with its current system.

Which statement is not true concerning the t distribution?

A) Compared to the normal distribution, the t distribution has more area in the tails and less in the center. B) As the number of degrees of freedom increases, the t distribution approaches the normal distribution. C) The t distributions are skewed to the left. D) The population variance is unknown and is estimated by the sample variance s2.