Question

1. The following set of data lists the number of text messages sent per day in a sample of college students and a sample of their parents. College students: 43, 12, 14, 13, 54, 7, 50, 15, 21, 21 Parents: 24, 0, 20, 21, 3, 21, 17, 19, 5, 10 Compute the mean, median, mode and sum of squares for each group

2. Compute the range, variance and standard deviation for each group

3. Under what circumstances would the median or mode be a preferred measure of central tendency, rather than a mean?

Answer #1

The stem and leaf plot shows a set of data regarding the number
of text messages sent and received per day by a group of college
students.
0
2 6 7
1
2 2 6
2
2 4 4 5
3
1 9 9 9
4
0
5
6
1
What is the mode of the distribution?
Based on this data, how many students send and receive 39 or
more text messages per day?
a.
10
b.
5
c.
4...

The stem and leaf plot shows a set of data regarding the number
of text messages sent and received per day by a group of college
students.Find the median and explain what it means in the context
of the problem. Write a detailed sentence.
0
2 6 7
1
2 2 6
2
2 4 4 5
3
1 9 9 9
4
0
5
6
1

. Forbes Magazine lists the richest
people in the world each year. The following data represents the
ages of 40 of these individuals. All of these individuals have a
net worth of at least $5 billion.
17
24
31
32
32
43
43 43
46
50
51
51
54
55
55 59
59
60
62
62
62
62
63 64
69
71
71
73
73
74
75 75
76
77
79
81
82
82
84 84
Calculate the mean and...

Compute a 95% confidence interval for the quantitative variable
for the sales data set and interpret that interval.
Sales (Y)
Mean
41.89
Standard
Error
0.84
Median
43
Mode
44
Standard
Deviation
8.39
Sample
Variance
70.32
Kurtosis
1.66
Skewness
-0.45
Range
46
Minimum
21
Maximum
67
Sum
4189
Count
100

34. The following data show the number of hours per day 12 STAT
3309 students spent in front of screens watchingtelevision-related
content. Use the printout below to answer the following
question:
HOURS
1.2
Mean
4.666666667
4.8
Standard Error
0.695802712
4.1
Median
4.75
4.7
Mode
#N/A
7.9
Standard Deviation
2.410331299
7.5
Sample Variance
5.80969697
5.1
Kurtosis
-1.182783193
2.3
Skewness
0.141232566
5.8
Range
7.1
1.9
Minimum
1.2
2.4
Maximum
8.3
8.3
Sum
56
Count
12
Confidence Level(95.0%)
1.531451444
What is the 95%...

The following scores were received on a recent exam. there were
100 questions asked and 1 point was awarded for each question
answered correctly. No partial credit was allowed.
98, 84, 89, 81, 50, 98, 72, 79, 68, 81, 85, 86, 90, 84, 77, 71,
70, 86, 81, 71, 84, 86, 85, 85, 94
a) based on the above data, construct a frequency distribution
table incorporating each value ( ie. no grouped frequencies)
containing absolute frequencies, relative frequencies, cumulative
frequencies...

QUESTION 1 [13 MARKS]
Write down only the letter corresponding to your choice next to
the question number.
1.1. A random variable that can assume only a finite number of
values is referred to as a
a) Infinite sequence
b) Finite sequence
c) Discrete random variable
d) Discrete probability function
e) All of the above
1.2 Which one of the following statements is incorrect?
a) A data set provides information about people, objects or
other entities.
b) If the possible...

John and Mary visited 29 randomly selected Starbucks locations
and recorded the number of cappuccinos sold at each coffee shop on
April 1st. They summarized the data in the following frequency
distribution table: (Variable ,Frequency) (0, 2 ) (1, 5) ( 2, 8)
(3, 10) (4, 4) (5, 2)
a. For this scenario, identify the following: • Variable •
Individual (Subject) • Sample • What percentage of Starbucks
locations sold at least 3 cappuccinos?
b. Calculate the sample mean. Note:...

Data Set: 6 8 10 13 15 18 20 21 27 29 30 35 45 49 52 54 57 58
Define: mean and median.
1. mean 30.4, median 28
2. mean 28.4 , median 28
3. mean 31.4 , median 29
4. mean 30.4 , median 29
5. None of these answers
QUESTION 2
Sample: 45 71 34 88 46
For the given set of numbers, find the mean and the standard
deviation.
1.
mean: 56.8, deviation: 19.75
2.
mean:...

1. Correlations and Scatter Plots
The following data set represents avg time per week spent on social
media by age for 12 randomly chosen individuals.
Age 14 18 27 21 55 46 18 26 15 17 62 41 Time (s) 240 150 135 110 45
72 150 41 200 125 31 52
a. The correlation coefficient between the two variables is found
to be r = -0.84, and the standard deviation for each variable are
Sage = 16.71 and Stime...

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