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1. A ‘z’ – score is the number of standard deviations that an observation will be...

1. A ‘z’ – score is the number of standard deviations that an observation will be located above or below the mean. TRUE      FALSE

2. A normal distribution’s shape may either be symmetrical or slightly asymmetrical. TRUE      FALSE

3. Sample statistics are used to estimate population parameters.  TRUE      FALSE

4. The Empirical rule can be applied to skewed distributions. TRUE      FALSE

5. The Box and Whisker plot graphically indicates the mean for the data in a study. TRUE      FALSE

6 A correlation coefficient of “ + .20 “ indicates a strong relationship between two numerical variables. TRUE      FALSE

7. “ 1 “ has a value of “ 7 “ .TRUE      FALSE

8. The formula for the 4th quartile is “ 4( n+1 ) /4. TRUE      FALSE

9.. In the Frequency Distribution, the frequency column and the cumulative frequency column are located side-by-side. TRUE      FALSE

Math   Statistics-And-Probability   
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1. TRUE, Z scores defines how many deviations away from mean the data point is

2. FALSE. a normal distribution is truest sense has to be symmetrical

3. TRUE, we take out sample statistics to estimate population params

4. FALSE. Empirical rule is only for normal (symmetrical) distributions, not for skewed ones

5. FALSE. Median, Q1, Q3, min, max, outliers are what the box plot shows, not the mean

6. FALSE. ,20 is a weak correlation in magnitude

7. FALSE.

8. TRUE. that' the correct formula to take out the 4th Quartile

9. FALSE. It' only a frequency distribution, so cumulative distribution will not be mentioned as a default in another column

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