A random sample of 60 students in the business statistics course answered a survey on the...
A random sample of 60 students in the business statistics course answered a survey on the average number of hours they spent on statistics each week. Unfortunately, the original data were lost and all that remains is the frequency table below. From these data, calculate the estimated sample mean, variance, Standard Deviation and the coefficient of variation.
| hours | frequency |
| 0-3 | 18 |
| 4-7 | 16 |
| 8-11 | 14 |
| 12-15 | 10 |
| 16-19 | 2 |
show all working and formulas
Homework Answers
Add Answer to:
A random sample of 60 students in the business statistics course
answered a survey on the...
4. A random sample of 12 second-year university students enrolled in a business statistics course was...
4. A random sample of 12 second-year university students enrolled in a business statistics course was drawn. At the course's completion, each student was asked how many hours he or she spent doing homework in statistics. The data are listed below. It is known that the population standard deviation is o= 8.0. The instructor has recommended that students devote 3 hours per week for the duration of the 12-week semester, for a total of 36 hours. At 10% significance level...
A random sample of 12 second-year university students enrolled in a business statistics course was drawn....
A random sample of 12 second-year university students enrolled in a business statistics course was drawn. At the course's completion, each student was asked how many hours he or she spent doing homework in statistics. The data are listed below. 40, 34, 41, 29, 29, 37, 30, 41, 31, 37, 31, 40, 40, 41, 29, 30, 31, 31, 34, 29, 37, 41, 37, 40 It is known that the population standard deviation is 8. The instructor has recommended that students...
(4 points) A random sample of 12 second-year university students enrolled in a business statistics course was drawn...
(4 points) A random sample of 12 second-year university students enrolled in a business statistics course was drawn. At the course's completion, each student was asked how many hours he or she spent doing homework in statistics. The data are listed below. 51 64 63 54 63 52 63 57 55 65 59 58 It is known that the population standard deviation is 7. The instructor has recommended that students devote 5 hours per week for the duration of the...
9. A group of statistics students decided to conduct a survey at their university to find...
9. A group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time students spent studying per week. Assuming a population standard deviation of three hours, what is the required sample size if the error should be less than a half hour with a 99% level of confidence? 10.University officials say that at least 70% of the voting student population supports a fee increase. If the 95% confidence interval estimating the...
Here is probability data on a random sample of students who have enrolled in a Business-related...
Here is probability data on a random sample of students who have enrolled in a Business-related Math course... PASS FAIL Withdrew TOTAL Calculus .25 .05 .08 .38 Statistics .42 .08 .12 .62 TOTAL .67 .13 .20 1 Compute the probability of passing the course given that the course taken was calculus.
In an anonymous survey 34 students reported the hours they studied for a statistics final exam....
In an anonymous survey 34 students reported the hours they
studied for a statistics final exam. The histogram below shows the
results of the survey.
In an anonymous survey 34 students reported the hours they studied for a statistics final exam. The histogram below shows the results of the survey. Time spent studying 8 4 0-2 2-4 4-6 6-8 8-10 10-12 12-14 14-16 16-18 18-20 20-22 Hours Which statement below is the most accurate description of the center of the...
4. A survey asked a random sample of 363 first-year students how many hours they studied...
4. A survey asked a random sample of 363 first-year students how many hours they studied during a particular week. The mean was 15.3 hours. Suppose we know that the population standard deviation is 8.5 hours. Construct a 90%, 95% and 99% confidence interval for the mean study time of all first year students at this university. Interpret the 90% confidence interval.
In the survey of a random sample of students at a university, two questions were, “How...
In the survey of a random sample of students at a university, two questions were, “How many hours per week do you usually study?” and “Have you smoked marijuana in the past six months?” An analysis of the results produced the following SPSS output: A research question of interest is whether students who have smoked marijuana (group Y) in the past 6 months differ in study hours on average per week than those who have not (group N). Which...
A random sample of 60 business students required an average of 50.7 minutes to complete a...
A random sample of 60 business students required an average of 50.7 minutes to complete a statistics exam. Assume that the population standard deviation to complete the exam is 10.4 minutes. 1.Calculate the margin of error if the confidence level is 98%.
(Test on a Mean, Sigma Unknown): A random sample of 12 first-year university students enrolled in...
(Test on a Mean, Sigma Unknown): A random sample of 12 first-year university students enrolled in MATH 1051H was drawn. At the course's completion, each student was asked how many hours he or she spent doing homework in statistics. The data are listed below. (28, 36, 38, 37, 32,36), (31, 31, 40, 40, 41, 36) You estimate that the population standard deviation is 7. The instructor has recommended that students devote 3 hours per week for the duration of the...
4. A random sample of 12 second-year university students enrolled in a business statistics course was drawn. At the course's completion, each student was asked how many hours he or she spent doing homework in statistics. The data are listed below. It is known that the population standard deviation is o= 8.0. The instructor has recommended that students devote 3 hours per week for the duration of the 12-week semester, for a total of 36 hours. At 10% significance level...
(4 points) A random sample of 12 second-year university students enrolled in a business statistics course was drawn. At the course's completion, each student was asked how many hours he or she spent doing homework in statistics. The data are listed below. 51 64 63 54 63 52 63 57 55 65 59 58 It is known that the population standard deviation is 7. The instructor has recommended that students devote 5 hours per week for the duration of the...
In an anonymous survey 34 students reported the hours they
studied for a statistics final exam. The histogram below shows the
results of the survey.
In an anonymous survey 34 students reported the hours they studied for a statistics final exam. The histogram below shows the results of the survey. Time spent studying 8 4 0-2 2-4 4-6 6-8 8-10 10-12 12-14 14-16 16-18 18-20 20-22 Hours Which statement below is the most accurate description of the center of the...
4. A survey asked a random sample of 363 first-year students how many hours they studied during a particular week. The mean was 15.3 hours. Suppose we know that the population standard deviation is 8.5 hours. Construct a 90%, 95% and 99% confidence interval for the mean study time of all first year students at this university. Interpret the 90% confidence interval.
Most questions answered within 3 hours.
-
Which of the following is a provision of
NAFTA?
A.
Common accounting rules
B.
Adding new...
asked 17 minutes ago -
Need to do in Python? Can do in Javascript but not in Python
Write a function...
asked 32 minutes ago -
Industry: Telecommunications in India
Here, you need to discuss the sources of the growth pattern
and...
asked 1 hour ago -
Hydrobromic acid
dissolves solid iron according to the followiaung reaction:
Fe(s)+2HBr(aq)→
FeBr2(aq)+ H2(g)
Part A. What...
asked 3 hours ago -
Verify the following vector identity in SPHERICAL
COORDINATES.
div(curl(A)) = 0
asked 5 hours ago -
The work function (Φ) for a metal is 7.50×10-19 J.
What is the longest wavelength (nm)...
asked 6 hours ago -
1. Would the following procedural changes cause the
calculated mass percent Ni2+ ion in Ni(NH3)nCl2 to...
asked 7 hours ago -
1. Why does the voltage of the capacitor vary with frequency?
where does this missing voltage...
asked 8 hours ago -
p p please write each step out clearly
3. A manager of a company is considering...
asked 7 hours ago -
On October 1, Ebony Ernst organized Ernst Consulting; on October
3, the owner contributed $83,540 in...
asked 9 hours ago -
A.)As an electron moves through a region of space, its speed
decreases from 9.60 × 106...
asked 9 hours ago -
In java with the netbeans program do:
Through object programming
Create a class "ContadorP", which is...
asked 9 hours ago