HCD 300 - Homework 5 Exam #1 Questions with correct
answers
Which of the following statements are TRUE about the normal distribution
(choose one or more) - ✔✔- approximately 68% of values fall within one standard
deviation of the mean
- the mean, median, and mode are the same
- the curve is symmetrical
- the tails are asymptotic
In a normal distribution with a mean of 78 and a standard deviation of 7, what is
the probability that a score will be greater than 82? - ✔✔- 28.43%
Which of the following is a measure of how asymmetric your data is? - ✔✔-
Skewness
Which of the following represents a directional research hypothesis? - ✔✔H1: u1
> u2
In a normal distribution with a mean of 78 and a standard deviation of 7, what is
the probability that a score will be between 71 and 85? - ✔✔- 68.26%
Which of the following symbols represents the first research hypothesis? - ✔✔-
H1
True or False, the mean for a set of z scores is one. - ✔✔- False
, Which of the following methods may be helpful in determining the area under the
curve? (choose one or more) - ✔✔- Understand how to read your area under the
curve table
- Draw a diagram and shade the area of interest
- Stick with one version of the area under the curve table
If the kurtosis value is negative which of the following statements are true?
(choose one or more) - ✔✔- The distribution is flat
- The distribution is platykurtic
When using table B.1 in your text to determine the area under the curve which of
the following are true? (choose one or more) - ✔✔- The area between the mean
and the z score is the same for a positive or negative z score
- If you need the area above a positive z score you have to subtract the area
provided from 50
- If you need the area below a negative z score you have to subtract the area
provided from 50
If you know the z score (z), standard deviation(s) and mean (M), what formula
would you use to compute the raw score (X)? - ✔✔- X = z(s) + M
Given that the population of women's height has a mean of 63.6 inches and a
standard deviation of 2.5 inches, answer the following questions:
What is the probability that a woman will have a height between 61 inches and 65
inches? - ✔✔- 56.31%
answers
Which of the following statements are TRUE about the normal distribution
(choose one or more) - ✔✔- approximately 68% of values fall within one standard
deviation of the mean
- the mean, median, and mode are the same
- the curve is symmetrical
- the tails are asymptotic
In a normal distribution with a mean of 78 and a standard deviation of 7, what is
the probability that a score will be greater than 82? - ✔✔- 28.43%
Which of the following is a measure of how asymmetric your data is? - ✔✔-
Skewness
Which of the following represents a directional research hypothesis? - ✔✔H1: u1
> u2
In a normal distribution with a mean of 78 and a standard deviation of 7, what is
the probability that a score will be between 71 and 85? - ✔✔- 68.26%
Which of the following symbols represents the first research hypothesis? - ✔✔-
H1
True or False, the mean for a set of z scores is one. - ✔✔- False
, Which of the following methods may be helpful in determining the area under the
curve? (choose one or more) - ✔✔- Understand how to read your area under the
curve table
- Draw a diagram and shade the area of interest
- Stick with one version of the area under the curve table
If the kurtosis value is negative which of the following statements are true?
(choose one or more) - ✔✔- The distribution is flat
- The distribution is platykurtic
When using table B.1 in your text to determine the area under the curve which of
the following are true? (choose one or more) - ✔✔- The area between the mean
and the z score is the same for a positive or negative z score
- If you need the area above a positive z score you have to subtract the area
provided from 50
- If you need the area below a negative z score you have to subtract the area
provided from 50
If you know the z score (z), standard deviation(s) and mean (M), what formula
would you use to compute the raw score (X)? - ✔✔- X = z(s) + M
Given that the population of women's height has a mean of 63.6 inches and a
standard deviation of 2.5 inches, answer the following questions:
What is the probability that a woman will have a height between 61 inches and 65
inches? - ✔✔- 56.31%
