Question
In: Statistics and Probability
The following set of scores was collected on the number of hours spent on social media...
The following set of scores was collected on the number of hours spent on social media by students in a week:
11, 13, 14, 14, 15, 16, 17, 17, 18, 19, 20, 20, 21, 22, 22, 23, 23, 24, 24, 25
14) Which raw score is indicated at 45%? Use the formula shown in lectures
15) What is the percentile for 19 hours a week? Use the formula shown in lectures
16) Based on the previous example, construct a simple frequency distribution, a relative frequency distribution, a cumulative frequency distribution and a percentile
17) If you wanted to represent a distribution visually, how would you know if you should use a bar graph, pie chart, histogram or frequency polygon?
Formulas: P= i/n * 100
i = p*n
Solutions
Expert Solution
14.
15. For percentile correspond to
19hours:
17. Histogram is appropriate tool to
represent the given data.
orchestra answered 1 year agoRelated Solutions
The number of hours 10 students spent studying for a test and their scores on that...
The number of hours 10 students spent studying for a test and
their scores on that test is represented in the table below.
Hours spent studying, x
0
2
4
5
5
5
6
7
8
9
Test scores, y
40
51
64
69
73
75
93
90
95
95
7) What amount of the variance in test score (y) do the hours
spent studying (x) account for this sample? (r2 =?) Interpret the
result in the context of the...
The number of hours 1010 students spent studying for a test and their scores on that...
The number of hours
1010
students spent studying for a test and their scores on that test
are shown in the table. Is there enough evidence to conclude that
there is a significant linear correlation between the data?
Use
alphaαequals=0.050.05.
Hours, x
00
11
22
44
44
55
55
66
77
88
Test score, y
4141
4040
5555
5656
6464
6666
7575
7878
8181
9797
LOADING...
Click here to view a table of critical values for Student's
t-distribution.
Setup...
The number of hours 10 students spent studying for a test and their scores on that...
The number of hours 10 students spent studying for a test and
their scores on that test are shown in the table. Is there enough
evidence to conclude that there is a significant linear correlation
between the data? Use alphaequals0.05.
Hours, x= 0 1 2 4 4 5 5 6 7 8 Test score, y= 41 40 51 56 65 70
76 70 84 97
1. Setup the hypothesis for the test.
2. Identify the critical value(s). Select the correct...
The number of hours 10 students spent studying for a test and their scores on that...
The number of hours 10 students spent studying for a test and
their scores on that test is represented in the table below.
Hours spent studying, x
0
2
4
5
5
5
6
7
8
9
Test scores, y
40
51
64
69
73
75
93
90
95
95
3) Describe the type of correlation and interpret the
correlation in the context of the data. Be specific in describing
the magnitude, direction, and strength of the relationship.
(12p)
4)...
The number of hours 10 students spent studying for a test and their scores on that...
The number of hours 10 students spent studying for a test and
their scores on that test are shown in the table. Is there enough
evidence to conclude that there is a significant linear correlation
between the data? Use alphaαequals= .01
X(hours) = top row; Y(score)=bottom row
0
1
2
3
4
4
5
6
7
8
41
46
52
50
65
68
75
85
82
91
Set up hypothesis test = ??
Critical Values = ??
Calculate test statistic;...
The following data set is from a survey of the weekly number of hours spent exercising...
The following data set is from a survey of the weekly number of
hours spent exercising for 40 high school students.
8
10
14
3
11
9
11
5
11
17
13
11
9
13
6
8
10
15
3
10
13
12
15
13
12
5
1
7
5
7
9
5
5
10
9
12
2
7
6
8
a) Put in order the data set and determine the mean, median and
mode.
b) Calculate the bin width...
Time (hours) spent on social media per day 2 5 4 6 3 2 4 1...
Time (hours) spent on social media per day
2 5 4 6 3 2 4 1 0 1 3 2 5 4 2 6 3 7 4 3 5 2 4 1 3 4 2 4 3 5 3 6
3 2 4
1. For the above data set, give the minimum and maximum score
and calculate the range.
2. Calculate the standard deviation (show your work).
3. Choosing the appropriate format, draw a bar chart or
histogram of the...
Suppose data about the average number of hours people spend on social media websites at work...
Suppose data about the average number of hours people spend on
social media websites at work is randomly collected for 6
days:
5, 4, 3.1, 2, 4.5, 1.7
A.) If we assume this population is normally distributed, construct
an 99% confidence interval for the population average amount of
time people spend on social media websites at work. B.) Suppose I
want to know more about how workers spend their time throughout the
day. I want to test the claim that...
Data in hrs/week: Individual Hours/Week Spent on Social Media 1 8 2 8 3 15 4...
Data in hrs/week:
Individual
Hours/Week Spent on Social Media
1
8
2
8
3
15
4
9
5
5
6
10
7
4
8
5
9
14
10
20
11
16
12
7
13
6
14
8
15
10
16
4
17
9
18
18
19
13
20
12
21
8
22
6
23
11
24
20
25
9
26
5
27
7
28
19
29
8
30
6
31
16
32
7
33
16
34
9
35
4
36...
A statistics teacher collected the following data to determine if the number of hours a student...
A statistics teacher collected the following data to determine
if the number of hours a student studied during the semester could
be used to predict the final grade for the course. The default
level of significance is .05 in excel. Use the default level of
significance.
Student
Hours Studying
Final Grade
1
42
92
2
58
95
3
32
81
4
39
78
5
37
75
6
51
88
7
49
85
8
45
85
1. Is β1 statistically significant? State...
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