1.

For ratio and interval (continuous) variables with a normal distribution...

Group of answer choices

the median and interquartile range are often reported.

the proportion/percentage of responses are reported

both the mean and the standard deviation are typically reported.

a pie chart is displayed

2. I collect a group of participants to see if there's any correlation between steps taken in the course of a day and hours of sleep at night using data from wearable devices (like Fitbit). My result is: r=.76, p=.002. I can conclude that...

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Number of steps has a positive correlation with hours of sleep.

The two groups were 76% similar

There was no relationship between steps taken and hours of sleep

There was 76% greater odds of good sleep if participants walked more

In a normal distribution, it could be expected that ______ of the values would fall between +2 and -2 Standard Deviations above and below the mean.

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68%

90%

95%

Almost 100%

4.

If the 95% confidence interval for the mean weight in a study population of college freshmen extends from 110 to 237 pounds, a researcher can be 95% confident that the mean weight of all freshmen students (not just the ones randomly sampled for the study) is between 110 and 237.

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True

False