Question

1.) What are the two requirements for a distribution to be considered approximately Normal?

a._____________________

b._____________________

2.) What percent of observations is a normally distributed set of data are:

a. Between the mean and -2 standard deviations?__________________

b. Between -1 standard deviations and +3 standard deviations? ___________________

c. Above +1 standard deviations? ________________________

3.) If a particular IQ test is standardized to the model N(100, 14), what percent of people should have scores between 86 and 128?

____________________________

Answer 1

1.)

a.)The mean, median, and mode are equal.

b.) The area under the curve is approximately equal to 1.0

2.)

solved 2 questions here, for the rest one please repost