Determine the percentage of the population falling between the two standard scores given.

Question

-1.00 to 1.00

-1.17 to 1.55

0.00 to 1.00

Answer 1

To find probability between a and b in standard normal distribution, look up P(z < b) - P(z < a).

so to find probability between - 1 and 1, look up P(z < 1) - P(z < -1).

to convert that to percentage, move decimal point two places to the right (multiply by 100).