A lab instructor asked her class of 30 college seniors how many beers or mixed drinks they had last Saturday night that marked the beginning of the Spring Break. The data are presented below. Gender Drinks Female 1 Female 0 Female 2 Female 3 Female 0 Female 0 Female 0 Female 1 Female 2 Female 2 Female 3 Female 6 Female 4 Female 0 Female 0 Male 4 Male 3 Male 3 Male 5 Male 8 Male 0 Male 3 Male 4 Male 0 Male 5 Male 5 Male 0 Male 3 Male 4 Male 4 construct a frequency distribution table for the data for each of male and female. compute the mean and standard deviation of the number of drinks consumed by each of male and female drinkers. perform an independent t-test to test whether there was a significant gender difference in alcohol consumption in last Saturday's party.
Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.
A lab instructor asked her class of 30 college seniors how many beers or mixed drinks they had last Saturday night that marked the beginning of the Spring Break. The data are presented below.
|
Gender |
Drinks |
|
Female |
1 |
|
Female |
0 |
|
Female |
2 |
|
Female |
3 |
|
Female |
0 |
|
Female |
0 |
|
Female |
0 |
|
Female |
1 |
|
Female |
2 |
|
Female |
2 |
|
Female |
3 |
|
Female |
6 |
|
Female |
4 |
|
Female |
0 |
|
Female |
0 |
|
Male |
4 |
|
Male |
3 |
|
Male |
3 |
|
Male |
5 |
|
Male |
8 |
|
Male |
0 |
|
Male |
3 |
|
Male |
4 |
|
Male |
0 |
|
Male |
5 |
|
Male |
5 |
|
Male |
0 |
|
Male |
3 |
|
Male |
4 |
|
Male |
4 |
- construct a frequency distribution table for the data for each of male and female.
- compute the mean and standard deviation of the number of drinks consumed by each of male and female drinkers.
- perform an independent t-test to test whether there was a significant gender difference in alcohol consumption in last Saturday's party.
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