ULTICHOICE QUESTIONS : INDICATE THE RIGHT ANSWER WHEITHER (A,B,C,,D) Following is a sample of ERIC salary consulting company survey data (in $1,000). (Use for questions 1 to 4). 49, 72, 66, 55, 71, 68, 69, 75, 77, 78, 52, 79. Q.1: What is the average salary? A) 70,000. B) 67,583. C) 70. D) None of the above 2: Calculate the salary’s appropriate variance. 10,290 B) 105,901.5 C)105,901.5 D)105,901.5 Q.3: Calculate the standard deviation. A) 10,291 B) 105,901.5 C) 105,901.5 D) 10,291 Q.4: Calculate the coefficient of variation. A) 15.23 B) 152.30 C) 15.23 D) None of the above
MULTICHOICE QUESTIONS : INDICATE THE RIGHT ANSWER WHEITHER (A,B,C,,D)
Following is a sample of ERIC salary consulting company survey data (in $1,000). (Use for questions 1 to 4). 49, 72, 66, 55, 71, 68, 69, 75, 77, 78, 52, 79.
Q.1: What is the average salary? A) 70,000. B) 67,583. C) 70. D) None of the above
2: Calculate the salary’s appropriate variance.
- 10,290 B) 105,901.5 C)105,901.5 D)105,901.5
Q.3: Calculate the standard deviation. A) 10,291 B) 105,901.5 C) 105,901.5 D) 10,291
Q.4: Calculate the coefficient of variation. A) 15.23 B) 152.30 C) 15.23 D) None of the above
Q.5: The sum of deviations taken from arithmetic mean is?
- A) Minimum B) Zero C) Maximum D) None of these options
Q.6: The following histogram shows the distribution of the difference between the actual and “ideal” weights for 119 female students.
What is the approximate shape of the distribution?
- Nearly symmetric. B) Skewed to the left. C) Skewed to the right. D) Bimodal
Q.7: A numerical value used as a summary measure for a sample, such as a sample mean, is known as a: A) Parameter B) Statistics C) Population D) Statistic
Q.8: Consider the results of a Statistics final exam taken by 100 students, as given in the following relative frequency distribution: How many students received at least a 70 on this exam?
|
Grade |
> 50 |
50-59 |
60-69 |
70-79 |
80-89 |
90-100 |
|
Frequency |
15 |
10 |
30 |
25 |
15 |
5 |
- A) 45 B) 25 C) 30 D) 66
Q.9: A sample of 400 Regina households is selected and several variables are recorded. Which of the following statements is correct?
- A) Total household income is interval level data. B) Socioeconomic status (recorded as low income or middle income or high income is nominal level data. C) The number of people living in a household is a discrete variable. D) The primary language spoken in the household is ordinal level data.
Note: Questions 10 to 12 are based on the following sample of ages (in months) of 18 children at a day care 36, 42, 18, 32, 22, 22, 25, 29, 30, 31, 19, 24, 35, 29, 26, 36, 24, 28
Q.10: The
Q.11: The
Q.12: The standard deviation of the age of children is... A) 41.24 B) 6.42 C) 10.20 D) 6.24
Note: Questions 13 to 15 are based on the following grouped frequency table of the income x of 30 employees at a local small business (in 1000s).
|
Income |
26-28 |
28-30 |
30-32 |
32-34 |
34-36 |
|
Frequency |
2 |
11 |
8 |
5 |
4 |
Q.13: The relative cumulative frequency of the $28<x#$30 class is A) 11 B) 0.43 C) 0.06 D) 13
Q.14: The class that contains the 80th percentile is A) 26-28 B) 28-30 C) 30-32 D) 32-34
Q.15: Using class-midpoints as representative values, we can estimate the mean for this data as
A) 30870 B) 29790 C) 31000 D) 30500 E) 31340
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