# Statistics

posted by .

In a survey, the guess at the mean age for the class had a mean of 21.9 and a standard deviation of 3.03.

Given that Normally distributed populations have a first quartile of Z=-0.67 and a third quartile of Z=.67, what does this suggest about whether or not these guesses are normally distributed? The actual first quartile is 20 and the third is 23.

I am so lost i don't know how to do the steps or if a Z scored formula should even be applied. Thank you

## Similar Questions

1. ### math

No idea how to do this. I looked in my book and there usually is a data set present to get the first, second and third quartile. The lifetimes of lightbulbs of a particular type are normally distributed with a mean of 392 hours and …
2. ### statistics

For a particular sample of 71 scores on a psychology exam, the following results were obtained. First quartile = 58 Third quartile = 86 Standard deviation = 8 Range = 50 Mean = 75 Median = 72 Mode = 74 Midrange = 55
3. ### statistics

In our initial survey, the guess at the mean age for the class had a mean of 21.9 and a standard deviation 3.03. Using this information, what would be the first and third quartile be for the class?
4. ### statistics

In our initial survey, the guess at the mean age for the class had a mean of 21.9 and a standard deviation 3.03. Using this information, what would be the first and third quartile be for the class?
5. ### statistics

In our initial survey, the guess at the mean age for the class had a mean of 21.9 and a standard deviation 3.03. Using this information, what would be the first and third quartile be for the class?
6. ### statistics

In our initial survey, the guess at the mean age for the class had a mean of 21.9 and a standard deviation 3.03. Using this information, what would be the first and third quartile be for the class?
7. ### (math) statistic

For a particular sample of 63 scores on a psychology exam, the following results were obtained. First quartile = 57 Third quartile = 72 Standard deviation = 9 Range = 52 Mean = 72 Median = 68 Mode = 70 Midrange = 57
8. ### Statistics (Math)

A government report looked at the amount borrowed for college by students who graduated in 2000 and had taken out student loans. The mean amount was = \$ 17 , 776 and the standard deviation was s = \$12,034. The quartiles were Q 1 = …
9. ### statistics

Scores on an English test are Normally distributed with a mean of 78% and a standard deviation of 4.5%. Find the Value of the first quartile.
10. ### Elementary statistics

Scores on an English test are normally distributed with a mean of 78% and a standard deviation of 4.5%. Find the value of the first quartile.

More Similar Questions