Question
In: Statistics and Probability
Sam Suffolk is a student in MAT103 at SCCC. Sam has data from a random sample...
Sam Suffolk is a student in MAT103 at SCCC. Sam has data from a random sample of 20 students that represents how many miles (rounded to the nearest whole mile) each student lives from the SCCC Ammerman campus. Sam organizes this data in the following frequency distribution table. Look at the table carefully and answer the questions that follow.
|
Distance |
frequency |
|
0 - 10 |
8 |
|
10 - 19 |
5 |
|
20 - 29 |
3 |
|
30 - 49 |
5 |
|
50 - 59 |
2 |
Sam made two mistakes when creating the classes for this table. Assuming Sam's frequencies are correct, despite the errors in the class limits, answer each of the following.
Note: The first two lower class limits are correct.
(a) Identify Sam's mistakes.
(b) Can we determine how many students live 10 miles from the campus? If so, how many? If not, why not?
(c) Give an estimate of the number of students in the sample that live more than 25 miles from the campus. If more than one frequency is possible, state all possible values.
Solutions
Expert Solution
Sam done two mistakes that are
clear in the corrected class table in answer
orchestra answered 2 years agoRelated Solutions
A random sample of 59 students was selected from the PSU student data base. Each student...
A random sample of 59 students was selected from the PSU student
data base. Each student was asked their Sex and Height (in inches).
Below are the summary results:
Sex
N
Mean
SD
Female
42
66.10
2.58
Male
17
70.12
3.66
a) Using the summary information,
estimate with 99% confidence the difference in heights between the
sexes and interpret these results. What are the exact degrees of
freedom used in the calculation of the t-statistic?
b) Is there enough evidence...
A random sample of 59 students was selected from the PSU student data base. Each student...
A random sample of 59 students was selected from the PSU student
data base. Each student was asked their Sex and Height (in inches).
Below are the summary results:
Sex
N
Mean
SD
Female
42
66.10
2.58
Male
17
70.12
3.66
a) Using the summary information,
estimate with 99% confidence the difference in heights between the
sexes and interpret these results. What are the exact degrees of
freedom used in the calculation of the t-statistic?
b) Is there enough evidence...
A random sample of 30 Suffolk University employees had an average commute length of 13.5 miles,...
A random sample of 30 Suffolk University employees had an
average commute length of 13.5 miles, with a standard deviation of
7.5 miles. What is the 90% confidence interval for the mean commute
length of all Suffolk employees? Use 4 non-zero decimal places in
your calculations.
(a) Find the tα/2 , df
(b) Find σx
(c) Find the margin of error (MoE) and construct the confidence
interval
ONE SAMPLE T TEST A random sample of 22 students’ weights from the student population of...
ONE SAMPLE T TEST
A random sample of 22 students’ weights from the student
population of palamar college were taken. The average weight of the
population of college students is µ = 140. The 22 students in the
sample had the following weights:
X
135 205
119 195
106 185
135 182
180 150
108 175
128 190
160 180
143 195
175 220
170 235
Please state your null hypothesis and alternative hypothesis,
both as an equation and in...
Maria has data from a random sample of 16 subjects and is constructing a 95% confidence...
Maria has data from a random sample of 16 subjects and is
constructing a 95% confidence interval for the population mean.
Which value should she use for t*, her critical value?
Consider class data set to represent a simple random sample of the student. Construct the confidence...
Consider class data set to represent a simple random sample of
the student. Construct the confidence intervals required and also
write sample statistics calculated for each.
a) Calculate the 9% t-confidence interval for the mean pulse of
all the student
B) Calculate the 95%confidence interval for the true proportion
of all student who are registered
Voter Reg
Pulse Rate
64
75
74
65
72
72
60
66
60
69
89
64
71
50
80
80
62
85
60
65...
A graduate student obtains data from a sample of children with ADHD. The data represent level...
A graduate student obtains data from a sample of children with
ADHD. The data represent level of activity where higher scores
indicate more activity and are as follows:
31, 32, 38, 32, 31.
a) Find the median.
b) Find the mean.
c) Find the range.
d) Find the standard deviation.
e) Find the z-score for child 3.
f) Find the z-score for child 1.
g) For child 4, find the standardized score with a
mean of 52 and variance of...
A student is interested in the sleep quality of students. That student selects a random sample...
A student is interested in the sleep quality of students. That
student selects a random sample of 21 students (age 19-24 years)
from each four undergraduate years (Freshman, Sophomore, Junior and
Senior), and applies Pittsburgh Sleep Quality Index (PSQI) and
obtains their responses. PSQI includes 19 self-reported items and
is designed to evaluate overall sleep quality (Data are presented
in Table 1 below). The student is interested in determining whether
there is any evidence of a difference in sleep quality...
A student conducts a simple random sample of students from her high school and finds that...
A student conducts a simple random sample of students from her
high school and finds that 21 out of 100 students in her sample
regularly walk to school. Give a point estimate for the proportion
of all students at her high school who regularly walk to school.
For each combination of sample size and sample proportion, find the
approximate margin of error for the 95% confidence level. (Round
the answers to three decimal places.) In a sample of 16 students,...
The following random sample of weekly student expenses in dollars is obtained from a normally distributed...
The following random sample of weekly student expenses in
dollars is obtained from a normally distributed population of
undergraduate students with unknown parameters.
8
56
76
75
62
81
72
69
91
84
49
75
69
59
70
53
65
78
71
87
71
74
69
65
64
You have been charged to conduct a statistical test in SPSS to
verify the claim that the‘average weekly student expenses’ is
different than 74 dollars using an alpha level of 5%.
...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Create 5 short-term plan of technology projects that you can perform outside of an I.T. department...
- Derek plans to retire on his 65th birthday. However, he plans to work part-time until he...
- Toady and Froggy were running a vegan cafe together. The business was having financial difficulties.Betelguese, who...
- 1. The following questions concern Jesse Gelsinger who suffered from partial OTC. a. In the...
- Pittman Company is a small but growing manufacturer of telecommunications equipment. The company has no sales...
- TzeMay was one of the first women engineering students at ABC University. She graduated in 1995...
- Use the following information to calculate these various solvency measures: a) NWC, B) WCR, c) Current...
ADVERTISEMENT