Statistics Test 2

In a population with u=50, what is the deviation score for x=45 (X-mean)

-5

In a population of N=10 scores, the smallest score is x=8 and the largest score is x=20. The range for the population is ________.

12

From the following samples, which set of scores has the smallest deviation?

145,143,145,147

A sample consists of n=16 scores. How many of the scores are used to calculate the range?

2

What is the mean of the following samples of scores?

3

For a perfectly symmetrical with a mean of 30, what is the value of the mean

30

For the population of scores shown in the frequency distribution table, the mean is ___? X F 5 2 4 1 3 4 2 3 1 2

34/12=2.83

For the sample shown in the frequency distribution table, the mode is _____.

4

What is the median of the following set of scores? 12,5,6,1,2

5

What is the value of the median for the following set of scores? Scores: 1,3,3,5,6,7,8,23

5.5

A population of n=6 scores has a sum of x=48. What is the population mean?

8

A sample consists of n=16 scores. How many of the scores are used to calculate the sample variance?

All 16

For any set of data, the sum of the deviation scores will always be

Equal to zero

A researcher measures personality for a sample of n=50 people and classifies each person as either Type A, Type B, or Type C personality. WHICH MEASURE OF CENTRAL TENDENCY would be appropriate to summarize these measurements?

Mode

Which of the following symbols identifies the sample standard deviation

S

In general, what is the relationship between the standard deviation and variance?

Standard deviation √ of variance

A researcher is measuring problem-solving times for a sample of n=20 children. What is the best measure of central tendency for this data?

The mean

The value for the interquartile range is determined by _______.

The middle scores in the distribution

A professor records the academic major for each student in a class of n=40. The best of central tendency for these data would be??

The mode

Which of the following symbols identifies the population variance?

σ