Chapter 5
An Introduction to Psychological Statistics · 7 exercises
Problem 1
In your own words, what is probability?
4 step solution
Problem 2
There is a bag with 5 red blocks, 2 yellow blocks, and 4 blue blocks. If you reach in and grab one block without looking, what is the probability it is red?
3 step solution
Problem 3
Under a normal distribution, which of the following is more likely? (Note: this question can be answered without any calculations if you draw out the distributions and shade properly) Getting a -score greater than = 2.75 Getting a -score less than = -1.50
5 step solution
Problem 4
The heights of women in the United States are normally distributed with a mean of 63.7 inches and a standard deviation of 2.7 inches. If you randomly select a woman in the United States, what is the probability that she will be between 65 and 67 inches tall?
6 step solution
Problem 5
The heights of men in the United States are normally distributed with a mean of 69.1 inches and a standard deviation of 2.9 inches. What proportion of men are taller than 6 feet (72 inches)?
3 step solution
Problem 7
What proportion of the area under the normal curve is greater than = 1.65?
5 step solution
Problem 10
In a distribution with a mean of 70 and standard deviation of 12, what proportion of scores are lower than 55?
3 step solution