Question
In: Math
Brothers and sisters: Thirty students in a first-grade class were asked how many siblings they have....
Brothers and sisters: Thirty students in a first-grade class were asked how many siblings they have. Following are the results.
|
1 |
1 |
2 |
1 |
2 |
3 |
7 |
1 |
1 |
5 |
|
1 |
1 |
3 |
0 |
1 |
1 |
1 |
2 |
5 |
0 |
|
0 |
1 |
2 |
2 |
4 |
2 |
2 |
3 |
3 |
4 |
|
a. |
Construct a frequency histogram. |
|
b. |
Construct a relative frequency histogram. |
|
c. |
Are the histograms skewed to the left, skewed to the right, or approximately symmetric? |
Solutions
milcah answered 1 year agoRelated Solutions
The General Social Survey asked a sample of adults how many siblings (brothers and sisters) they...
The General Social Survey asked a sample of adults how many
siblings (brothers and sisters) they had (X) and also how
many children they had (Y). We show results for those who
had no more than 4 children and no more than 4 siblings. Assume
that the joint probability mass function is given in the following
contingency table:
y
x
0
1
2
3
4
0
0.03
0.01
0.02
0.01
0.01
1
0.09
0.05
0.08
0.03
0.01
2
0.08
0.05...
60 randomly selected students were asked how many siblings were in their family. Let X =...
60 randomly selected students were asked how many siblings were
in their family. Let X = the number of pairs of siblings in the
student's family. The results are as follows:
Siblings
Frequency
1
13
2
22
3
15
4
6
5
3
6
0
7
1
Round your answers to two decimal places.
The mean is:
The median is:
The sample standard deviation is:
The first quartile is:
The third quartile is:
What percent of the respondents have had...
54 randomly selected students were asked how many siblings were in their family. Let X -...
54 randomly selected students were asked how many siblings were
in their family. Let X - the number of pairs of siblings in the
student's family.
# of Siblings
0
1
2
3
4
5
Frequency
5
9
10
13
10
7
Round all your answers to one decimal place.
The mean is:
The median is:
The sample standard deviation is:
The first quartile is:
The third quartile is:
What percent of the respondents have at least 1 siblings?
_____%...
52 randomly selected students were asked how many siblings were in their family. Let X represent...
52 randomly selected students were asked how many siblings were
in their family. Let X represent the number of pairs of siblings in
the student's family. The results are as follows:
# of Siblings
0
1
2
3
4
5
6
Frequency
10
11
7
4
5
10
5
Round all your answers to 4 decimal places where
possible.
The mean is:
The median is:
The sample standard deviation is:
The first quartile is:
The third quartile is:
What percent...
Thirty graduate students were asked how many credit hours they were taking in the current quarter.
Student Number
Credit Hours
1
4
2
11
3
3
4
5
5
7
6
11
7
10
8
8
9
12
10
12
11
6
12
6
13
12
14
7
15
8
16
5
17
6
18
7
19
10
20
11
21
12
22
8
23
6
24
10
25
11
26
3
27
5
28
12
29
8
30
11
Thirty graduate students were asked how many credit hours they were taking in the current quarter....
A class survey in a large class for first-year college students asked, "About how many minutes...
A class survey in a large class for first-year college students
asked, "About how many minutes do you study on a typical
weeknight?" The mean response of the 259 students was x⎯⎯⎯ = 147
minutes. Suppose that we know that the study time follows a Normal
distribution with standard deviation σ = 65 minutes in the
population of all first-year students at this university. Use the
survey result to give a 95% confidence interval for the mean study
time of...
A class survey in a large class for first‑year college students asked, “About how many hours...
A class survey in a large class for first‑year college students
asked, “About how many hours do you study during a typical week?”
The mean response of the 463 students was ?¯=13.7 hours. Suppose
that we know that the study time follows a Normal distribution with
standard deviation ?=7.4 hours in the population of all first‑year
students at this university.
Regard these students as an SRS from the population of all
first‑year students at this university. Does the study give...
A class survey in a large class for first-year college students asked, "About how many minutes...
A class survey in a large class for first-year college students
asked, "About how many minutes do you study on a typical
weeknight?" The mean response of the 261 students was x¯¯¯x¯ = 130
minutes. Suppose that we know that the studey time follows a Normal
distribution with standard deviation σσ = 65 minutes in the
population of all first-year students at this university. Regard
these students as an SRS from the population of all first-year
students at this university....
A class survey in a large class for first-year college students asked, "About how many hours...
A class survey in a large class for first-year college students
asked, "About how many hours do you study in a typical week?". The
mean response of the 427 students was x¯¯¯ = 12 hours. Suppose that
we know that the study time follows a Normal distribution with
standard deviation 7 hours in the population of all first-year
students at this university. What is the 99% confidence interval
(±0.001) for the population mean?
Confidence interval is from ____to_____ hours.
A class survey in a large class for first-year college students asked, "About how many minutes...
A class survey in a
large class for first-year college students asked, "About how many
minutes do you study on a typical weeknight?" The mean response of
the 257 students was x¯¯¯x¯ = 140 minutes. Suppose that we
know that the study time follows a Normal distribution with
standard deviation σσ = 65 minutes in the population of
all first-year students at this university.
Use the survey result to give a 95% confidence interval for the
mean study time of...
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