![subject](/tpl/images/cats/mat.png)
Mathematics, 21.04.2020 00:02 molly7654
In order to estimate the average time spent on the computer terminals per student at a local university, data were collected for a sample of 81 business students over a one-week period. Assume the population standard deviation is 1.8 hours. Answer questions 7 - 9.
7. What is the standard error of the mean?
a. 7.50
b . 0.39
c. 2.00
d. 0.20
8. With a 0.95 probability, the margin of error is approximately
a. 0.39
b 1.96
c. 0.20
d. 1.64
9. If the sample mean is 9 hours, then the 95% confidence interval is
a. 7.04 to 10.96 hours
b. 7.36 to 10.64 hours
c. 7.80 to 10.20 hours
1d. 8.61 to 9.39 hours
![ansver](/tpl/images/cats/User.png)
Answers: 2
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Mathematics
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 12:40
20 ! need which shows a difference of squares? 10y^2-4x^2 16y^2-x^2 8x^2-40x+25 64x^2-48x+9
Answers: 2
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 21:00
Mr.zimmerman invested $25,000 in an account that draws 1.4 interest, compouneded annually. what is the total value of the account after 15 years
Answers: 1
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 22:30
1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x
Answers: 1
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 23:00
Apackage of orgainc strwberries costs $1.50 while there in season and $2.25 when not in season what the percent increase
Answers: 1
You know the right answer?
In order to estimate the average time spent on the computer terminals per student at a local univers...
Questions
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 07.10.2019 19:30
![question](/tpl/images/cats/biologiya.png)
Biology, 07.10.2019 19:30
![question](/tpl/images/cats/mat.png)
Mathematics, 07.10.2019 19:30
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/istoriya.png)
History, 07.10.2019 19:30
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 07.10.2019 19:30
![question](/tpl/images/cats/mat.png)
Mathematics, 07.10.2019 19:30
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 07.10.2019 19:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
History, 07.10.2019 19:30
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 07.10.2019 19:30
![question](/tpl/images/cats/en.png)
English, 07.10.2019 19:30