Question

In: Statistics and Probability

question 1. On a recent quiz, the class mean was 69 with a standard deviation of...

question 1.

On a recent quiz, the class mean was 69 with a standard deviation of 2.3.

Calculate the z-score (to at least 2 decimal places) for a person who received score of 63.
z-score:
Is this unusual?

Unusual
Not Unusual

question 2.

The highway mileage (mpg) for a sample of 8 different models of a car company can be found below. Find the mean, median, mode, and standard deviation. Round to one decimal place as needed.

19, 22, 25, 28, 30, 32, 33, 33

Mean =

Median =

Mode =

Standard Deviation =

Expert Solution

Is it Unusual?

Since z-score is between -2 and 2, The value is Not Unusual. If the value falls outs the limits then it's considered unusual.

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The Median is the middle number in the set of ordered data.

The mode is the number that occurs more often.


19	361
22	484
25	625
28	784
30	900
32	1024
33	1089
33	1089

orchestra answered 3 years ago

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