5. The owner of a small company employs 6 people. As part of their personnel file, she asked each one to record to the nearest one-tenth of a mile the distance they travel one way from home to work. The distances are: 52, 38. 15, 24, 15. 39 The variance of the data set is: A. 13.6229 B. 14.9231 C. 185.5833 D. 222.7

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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5. The owner of a smal company employs 6 people. As part of their personnel file, she
asked each one to record to the nearest one-tenth of a mile the distance they travel
one way from home to work. The distances are:
38. 15. 24,
52.
15,
39
The variance of the data set is:
A. 13.6229
C. 185.5833
B. 14.9231
D. 222.7
6. According to the empirical rule, approximately what percentage of normally distributed
data lies within one standard deviation of the mean?
A. 59%
B. 68%
C. 95%
D. 99.7%
7. Which measure of central tendency can be used for both numerical and categorical
variables?
C. Mode
A. Mean
B. Median
D. Range
8. Which of the following statements about the median is NOT true?
A. It is more atffected by extreme values than the mean.
B. It is a measure of central tendency.
C.It is equal to second quartile.
D. It is equal to the mode in bell-shaped distributions.
9. The members of the Engineering Club promised to give the following monetary donations
for COMD-19 response activities in a certain city: 10 members pledged Php9000 each,
15 members pledged Php10000 each, 20 members pledged Php15000 each, 11
members pldeged Php14000 each, 17 members pideged Php7000 each, 24 members
pledged Php9500 each, 19 members pldeged Php12000 each, and 7 members pledged
Php12500 each. What is the median amount of members' pledged donations?
A. Php9500
B. Php10000
C. Php12000
D. Php12500
10. Suppose that the variance for 40 observations is 50. If all the observations are increased
by 20, the resulting variance of these increased values will be?
A. 2.5
C. 70
B. 50
D. 400
11. Data on the time an online banking transaction is completed, gathered from 400
randomly selected online banking transactions produced the following summary
statistics: 8 = 21.3 seconds; s= 1.7 seconds. At least what proportion of the data lies within
2standard deviations from the mean?
A. 20%
B. 72.6%
C. 86.8%
D. 91%
Transcribed Image Text:5. The owner of a smal company employs 6 people. As part of their personnel file, she asked each one to record to the nearest one-tenth of a mile the distance they travel one way from home to work. The distances are: 38. 15. 24, 52. 15, 39 The variance of the data set is: A. 13.6229 C. 185.5833 B. 14.9231 D. 222.7 6. According to the empirical rule, approximately what percentage of normally distributed data lies within one standard deviation of the mean? A. 59% B. 68% C. 95% D. 99.7% 7. Which measure of central tendency can be used for both numerical and categorical variables? C. Mode A. Mean B. Median D. Range 8. Which of the following statements about the median is NOT true? A. It is more atffected by extreme values than the mean. B. It is a measure of central tendency. C.It is equal to second quartile. D. It is equal to the mode in bell-shaped distributions. 9. The members of the Engineering Club promised to give the following monetary donations for COMD-19 response activities in a certain city: 10 members pledged Php9000 each, 15 members pledged Php10000 each, 20 members pledged Php15000 each, 11 members pldeged Php14000 each, 17 members pideged Php7000 each, 24 members pledged Php9500 each, 19 members pldeged Php12000 each, and 7 members pledged Php12500 each. What is the median amount of members' pledged donations? A. Php9500 B. Php10000 C. Php12000 D. Php12500 10. Suppose that the variance for 40 observations is 50. If all the observations are increased by 20, the resulting variance of these increased values will be? A. 2.5 C. 70 B. 50 D. 400 11. Data on the time an online banking transaction is completed, gathered from 400 randomly selected online banking transactions produced the following summary statistics: 8 = 21.3 seconds; s= 1.7 seconds. At least what proportion of the data lies within 2standard deviations from the mean? A. 20% B. 72.6% C. 86.8% D. 91%
1. Which of the following statements is NOT TRUE for the mean?
A. Every set of interval-level data has a mean value.
B. The mean is not affected by extreme values in the data set.
C. A data set has only one mean value.
D. The total of the deviations or differences of every observation from the mean is
zero.
2. The computation of the arithmetic mean requires at least the
A. nominal level of measurement.
B. ordinal level of measurement.
C. interval level of measurement.
D. ratio level of measurement.
3. The number of vehicles passing through a traffic monitoring device during each 30
minute period was recorded. The results are shown below. Find the median number of
vehicles.
28
23
29
25
26
23
23
22
26
25
33
29
27
29
23
18
13
25
25
25
A. 24.85
В. 25
C. 26
D. 29
4. The distributions of data set have different shapes. The distribution may be symmetrical
or asymmetrical. If a distribution is asymmetric, it is either positively skewed or negatively
skewed. If the data set has lower frequencies of smaller data values, then the data
distribution is said to be
A. Bimodal
B. Skewed to the right
C. Skewed to the left
D. Unimodal
Transcribed Image Text:1. Which of the following statements is NOT TRUE for the mean? A. Every set of interval-level data has a mean value. B. The mean is not affected by extreme values in the data set. C. A data set has only one mean value. D. The total of the deviations or differences of every observation from the mean is zero. 2. The computation of the arithmetic mean requires at least the A. nominal level of measurement. B. ordinal level of measurement. C. interval level of measurement. D. ratio level of measurement. 3. The number of vehicles passing through a traffic monitoring device during each 30 minute period was recorded. The results are shown below. Find the median number of vehicles. 28 23 29 25 26 23 23 22 26 25 33 29 27 29 23 18 13 25 25 25 A. 24.85 В. 25 C. 26 D. 29 4. The distributions of data set have different shapes. The distribution may be symmetrical or asymmetrical. If a distribution is asymmetric, it is either positively skewed or negatively skewed. If the data set has lower frequencies of smaller data values, then the data distribution is said to be A. Bimodal B. Skewed to the right C. Skewed to the left D. Unimodal
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