Web Calculator Exercise 1

1012 Words May 8th, 2013 5 Pages
Web Calculator Exercise 1

Descriptive Statistics

1. The table below presents data for a sample of people who completed a religious survey.

|Age |Gender |Denomination |Church Attendance |
|56 |1 |7 |4 |
|46 |2 |6 |5 |
|49 |2 |6 |5 |
|49 |1 |1 |5 |
|27 |2 |9 |5 |
|51 |1 |4 |2 |
|47 |2 |2
…show more content…
The price of cars is normally distributed.

a. What is a Z score for a car with a price of $ 33,000? The Z score for a car with a price of $33,000 is 2.8571.

http://easycalculation.com/statistics/z-score-standard.php

b. What is a Z score for a car with a price of $30,000?

The Z score for a car with the price of $30,000 is 2.0.

http://easycalculation.com/statistics/z-score-standard.php

c. At what percentile rank is a car that sold for $30,000?

With a Z score of 2, the percentile rank of a car sold at $30,000 is .977 x 100 = 97.7 percentile.

I found this information by taking the Z score and looking at the Z table under the number curve, located in appendix of my textbook.

3. In one elementary school, 200 students are tested on the subject of Math and English. The table below shows the mean and standard deviation for each subject.

| |Mean |SD |
|Math |67 |9.58 |
|English |78 |12.45 |

One student’s Math score was 70 and the same individual’s English score was 84. On which exam did the student

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