Deck 13: Statistics Organising the Data

Question 1

13, 24, 33, 47, 56, 68, 87
-1) the arithmetic mean of the values above is:

A) 46.9
B) 47
C) 46.857
D) 46.86

Answer 1

A

Question 2

13, 24, 33, 47, 56, 68, 87
-2) The median of the values above is:

A) 56
B) 33
C) 47
D) 68

Answer 2

C

Question 3

3) The mode of 9, 12, 13, 23, 13, 16, 18, 35, 14, 18, 18, 13 is:

A) 13
B) 18
C) 13 or 18
D) 13 and 18

Answer 3

D

Question 4

4) If the standard deviation of a data set is 4 then the variance is:

A) 2
B) 16
C) 6
D) 40

Question 5

5) What is the range of the scores:
23 14 17 28 31 27

A) 17
B) 18
C) 7
D) 4

Question 6

6) A researcher records A if a car stopped at a red light, B if it crossed and C if it stopped only with difficulty. The data recorded are:

A) At an interval level of measurement
B) Ordinal data
C) Categorical data
D) At a ratio level of measurement

Question 7

7) Which of the following kinds of data can be treated as being at interval level?

A) The gender of each participant
B) Scores on a standardised measure of anxiety
C) Songs ranked by a participant in order of preference
D) The kind of physical activity each participant reports being engaged in

Question 8

8) Which of the following is true?

A) The sample variance is almost always larger than the population variance
B) The formula for standard deviation when it is used to estimate population variance uses just N on the bottom of the equation
C) The formula for standard deviation when it is used to estimate population variance uses N -1 on the bottom of the equation
D) The 'uncorrected' version of the standard deviation formula uses N -1 on the bottom of the equation

Question 9

9) Which of the following is true?

A) Sample statistics are always a good indication of population parameters
B) Population parameters can never be estimated from sample statistics
C) Sample statistics can be used to estimate population parameters
D) Population parameters can be used to estimate sample statistics

Question 10

10) A disadvantage of using the arithmetic mean to measure central tendency is that:

A) It is not a very sensitive measure
B) It is easily distorted by rogue scores
C) It cannot be used in the estimation of population parameters
D) It is less accurate than the median