Question 1

Given the following scores on a midterm exam 72, 89, 91, 90, 100, 68, 80,76, 78,94,94,90,84,86,88,87,92,96,74,93, find the best answer to the following questions.
-Calculate the mean of the scores.

Accepted Answer

A)  83 
B)  86 
C)  90 
D)  92

Question 2

Anton collected survey data regarding teachers' use of technology in their teaching activities. He was pleased that his data are generally normally distributed. Among other data, he collected age, number of years teaching, highest degree held, amount of time spent in online office hours weekly, and whether the teacher reported using an electronic discussion board.
-Anton will most likely report which of the following measures of central tendency for the variable number of years teaching?

Accepted Answer

A)  Mode 
B)  Range 
C)  Mean 
D)  Median

Question 3

In a distribution with a mean of 68 and a standard deviation of 4, 84% of scores fall below a score of approximately

Accepted Answer

A)  64. 
B)  72. 
C)  76. 
D)  80.

Question 4

Of the following, which represents a positively skewed distribution?

Accepted Answer

A)  Mean<median 
B)  Median<mean 
C)  Mode< median 
D)  Mode<mean

Question 5

Claus received a raw score of 86. Given that the test had a mean of 88, and a standard deviation of 4. What is Claus's approximate t -score?
-What can we conclude about Claus's stanine score?

Accepted Answer

A)  It is negative. 
B)  It is approximately zero. 
C)  It is approximately 5. 
D)  It is approximately 8.

Question 6

Logan accessed an existing database to answer his research question regarding the role of identification of a learning disability and odds of going to a private school. The variables of interest include category of disability, type of school, achievement scores in the first, third, and sixth grade, parents SES.
-Logan needs to report the measure of central tendency for his variable category of disability, which measure should he use?

Accepted Answer

A)  Median 
B)  Mode 
C)  Mean 
D)  range

Question 7

Which of he following is NOT a measure of central tendency?

Accepted Answer

A)  Mode 
B)  Standard deviation 
C)  Mean 
D)  Median

Question 8

Given the following distribution-24,19,15,18,16,24,17-the score that best represents the median is

Accepted Answer

A)  15 
B)  18 
C)  19 
D)  24

Question 9

The measure of central tendency that represents the most frequently occurring score is the

Accepted Answer

A)  mode. 
B)  standard deviation. 
C)  mean. 
D)  median.

Question 10

Betsy is reporting the results of standardized testing to parents of her class students. Natal received a t score of 80.
-Given Natal's t-score, his z-score would be

Accepted Answer

A)  -1 
B)  0 
C)  2 
D)  3

Question 11

The statistical symbol 'n' represents

Accepted Answer

A)  any given score. 
B)  total number of subjects. 
C)  number of subjects in a particular group. 
D)  the mean.

Question 12

Given the following scores on a midterm exam 72, 89, 91, 90, 100, 68, 80,76, 78,94,94,90,84,86,88,87,92,96,74,93, find the best answer to the following questions.
-What is the range?

Accepted Answer

A)  24 
B)  28 
C)  32 
D)  46

Question 13

Claus received a raw score of 86. Given that the test had a mean of 88, and a standard deviation of 4. What is Claus's approximate t -score?
-Which of the following best represents Claus's z- score?

Accepted Answer

A)  -1.5 
B)  -.5 
C)  .5 
D)  2.5

Question 14

Anton collected survey data regarding teachers' use of technology in their teaching activities. He was pleased that his data are generally normally distributed. Among other data, he collected age, number of years teaching, highest degree held, amount of time spent in online office hours weekly, and whether the teacher reported using an electronic discussion board.
-Anton will most likely report which of the following measures of central tendency for the variable highest degree held?

Accepted Answer

A)  Mode 
B)  Range 
C)  Mean 
D)  Median

Question 15

Given the following distribution-24,19,15,18,16,24,17-the score that best represents the mean is

Accepted Answer

A)  15 
B)  18 
C)  19 
D)  24

Question 16

The measure of central tendency used for interval and ratio data is the

Accepted Answer

A)  mode. 
B)  standard deviation. 
C)  mean. 
D)  median.

Question 17

To convert a raw score to a z score, one needs the following information:

Accepted Answer

A)  raw score and mean. 
B)  raw score and standard deviation. 
C)  mean and standard deviation. 
D)  raw score, mean, and standard deviation.

Question 18

If there are extreme scores in a data set, what is the most appropriate measure of central tendency to indicate the most typical score?

Accepted Answer

A)  Mode 
B)  Standard deviation 
C)  Mean 
D)  Median

Question 19

Quantitative indices calculated for an entire population are referred to as

Accepted Answer

A)  statistics. 
B)  inferential. 
C)  parameters. 
D)  correlations.

Question 20

Given the following distribution-24,19,15,18,16,24,17-the measure of central tendency best to report is the

Accepted Answer

A)  Mean 
B)  Range 
C)  Median 
D)  Mode

Exam 12: Descriptive Statistics Activities and Resources

Given the following scores on a midterm exam 72, 89, 91, 90, 100, 68, 80,76, 78,94,94,90,84,86,88,87,92,96,74,93, find the best answer to the following questions. -Calculate the mean of the scores.