A reading test with 50 possible points yields a bell-shaped distribution with scores ranging from 5 to 48 on a large sample of third graders. If the same test were administered to fifth graders, what would we expect the form of the frequency distribution to be?

An analyst who manages an equity portfolio forecasts a portfolio return of 10% and estimates a standard deviation of annual return of 18%. What is the probability that portfolio return will be between
1 0% and 20%?

Consider the following statements about t and z-tests:
I). The degrees of freedom in a t-distribution depend on sample size, and generally the degrees of freedom are defined as n-1.
II). As sample size increases a t-graph begins to resemble a z-graph.
III). For infinity degrees of freedom the critical values for a z-distribution can also be found on a t-table in the row that has infinity as its degrees of freedom.
Which statement(s) is/are TRUE?

Which of the following is an example of ordinal data?

The closing price today for a security was $20. It was $18 20 days ago.