The type of exercise performed by participants.

The frequency of exercise among participants.

The scores from the anxiety assessment questionnaire.

The duration of the exercise sessions.

box plot

bar graph

histogram

scatter plot

The population size must be larger than the sample size.

The sample size must be at least 30 for the sample means to approximate a normal distribution.

The population from which samples are drawn must be normally distributed.

The population must have a mean of 0 and standard deviation of 1.

50

10

2

5

95% of adult women in the city are between 160 cm and 170 cm tall.

If the study were repeated 100 times, approximately 95 of the confidence intervals would contain the true average height of adult women in the city.

The average height of the sample is 165 cm.

There is a 95% chance that the true average height of adult women in the city is between 160 cm and 170 cm.

The number of participants in the study.

The standard deviation of test scores in the sample group.

The average score on a cognitive test from a sample of participants.

The average score on a cognitive test for the entire population of individuals who experience sleep deprivation.

50%

68%

95%

97%

A variable that is measured on a continuous scale, such as height or weight.

A variable that represents categories without a specific order, such as colors or types of fruit.

A variable that can be counted and has a true zero point, such as age or income.

A variable that represents categories with a meaningful order but no consistent difference between categories, such as rankings or satisfaction levels.

The difference between the smallest and largest values in the dataset.

The difference between the 25th and 75th percentiles of the dataset.

The sum of the 25th and 75th percentiles of the dataset.

The average of all values between the 25th and 75th percentiles of the dataset.