please don't write any do these MCQs wrongly if you don't know the answers. Thanks.

1.In Town A, the minimum family size is 2, and the maximum family size is 17; in Town B, the minimum family size is 4, and the maximum family size is 19. On the basis of this information, we can say that ________.

a)	the range in family size is the same in both towns

b)	the average age of residents in Town A is increasing

c)	Town B is larger than Town A

d)	we cannot draw any conclusions about families in Towns A or B without first knowing the total number of families in each of these two towns

e)	Town B has larger average family sizes than Town A

2. The z-score of the number of hours that Alex sleeps every night is 1.50, and the z-score of the number of days that Alex spends with friends every month is 1.00. If sleeping hours and friendship days are both normally distributed, then these values indicate that ________.

a)	Alex's sleep time is more deviant than Alex's friendship time

b)	Alex's sleep time is less deviant than Alex's friendship time

c)	Alex spends more time sleeping than he does with his friends

d)	No conclusion can be drawn unless the raw scores are stated in the original units of measurement.

3. It makes sense to calculate the mean for religious affiliation.

	a) True
	b) False

4.The range CANNOT be used with nominal variables.

	a) True
	b) False

5. If you begin at the centre of a normal distribution, and go out a fixed distance from the centre, you will always find the same ________.

a)	variable response categories

b)	number of cases

c)	percentage of variables

d)	number of variables

e)	percentage of cases

6-The shape of the normal distribution ________.

a)	may be asymmetrical, so long as there is only one mode

b)	is symmetrical, only

c)	may be leptokurtic or platykurtic, so long as the median and mean are equivalent

d)	is positively skewed or negatively skewed, only

e)	may be bimodal, so long as the median and mean are equivalent

7-A standard interpretation of the ________ takes the following form: "In this sample the variable FAVOURITE_MOVIE displays 39% of its possible variation."

a)	standard deviation

b)

IQV

c)

variance

d)

range

8-The normal curve is a distribution shape that is relevant for variables at the ________ level of measurement.

a)	ratio, only

b)	nominal and ordinal

c)	ordinal, only

d)	nominal, only

e)	interval and ratio

9-Under a normal curve, what percentage of cases should lie between +1 and -1 standard deviation units?

a)

34%

b)

99.7%

c)

80%

d)

68%

e)

95%

10-In one set of variable scores, the mean is 10 and the standard deviation is 1. When a raw score of 20 is converted to a z-score, the resulting z-score is ________.

a)

2

b)

1.5

c)

10

d)

200

11-A histogram is different from a bar chart because:

a)	It can only present information for one variable

b)	The height of the bars represents the raw score or percentage of each category

c)	It can only be used with a discrete variable

d)	It can only be used with a continuous variable

12-If central tendency statistics and dispersion statistics are obtained for the variable NUMBER OF HOURS OF SLEEP, and also for the variable LEVEL OF FATIGUE, this would be an example of a(n) ________.

a)	multivariate analysis

b)	inverse relationship

c)	bivariate analysis

d)	direct relationship

e)	univariate analysis

13-Susan received 92% on the last test where the class average was 56% and the standard deviation was 12. What would her z-score be if the class average formed a normal distribution?

a)

3.3

b)

3

c)

2

d)

4

e)

2.7

14-The class average for Tommy's French test was 64% with a standard deviation of 8. Assuming that the class marks were normally distributed, what percentage of classmates received a grade between the mean and 80%?

a)

50%

b)

48%

c)

45%

d)

51%

e)

53%

15-Variance is most appropriately used with ________.

a)	interval or ratio variables

b)	categorical variables of any level of measurement

c)	continuous variables of any level of measurement and ordinal variables

d)	nominal variables

e)	ordinal variables

16-The measure of central tendency that is used in the calculation of the variance and the standard deviation is the ________.

a)

median

b)

mean

c)

IQV

d)

range

e)

mode

17-The measure of central tendency that takes into account all the values in the distribution is the:

a)

IQV

b)

Mode

c)

Median

d)

Mean

18-If the ________ age in a sample of students is 21, the interpretation would be "50% of the cases on the variable AGE fall below a score of 21."

A)

mode

B)

median

C)

mean

D)	central tendency

E)	dispersion

19-If the percentage of cases which have a z-score value between the mean and a z-score value of 1.65 is 45%, then the percentage of cases which have a z-score value between 1.65 and 1.65 is ________.

a)

45%

b)

30%

c)	The percentage cannot be determined without a z-score table.

d)

90%

e)

15%

20-If the largest score in a distribution is made extremely larger:

a)	Both the mean and median will remain unaffected

b)	The mean will increase while the median will remain unaffected

c)	Both the mean and median will increase

d)	The mode will increase while both the mean and median will remain unaffected

e)	The median will increase while the mean will remain unaffected