Question

A national random sample of 20 ACT scores from 2010 is listed below. Calculate the sample...

A national random sample of 20 ACT scores from 2010 is listed below. Calculate the sample mean and standard deviation. 32, 26, 13, 23, 23, 25, 18, 22, 17, 19, 15, 26, 30, 30, 18, 20, 17, 26, 17, 18
1- O 20.85, 5.94
2-20.50, 5.94
3- none of the above
4- 20.50, 5.79

Business   Accounting   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A random sample of marks scored by 20 students in a CAT is listed below. Calculate...
A random sample of marks scored by 20 students in a CAT is listed below. Calculate the sample mean and standard deviation: 29, 26, 13, 23, 23, 25, 17, 22, 17, 19, 12, 26, 30, 30, 18, 14, 12, 26, 17, 18 Select one: a. 20.50, 5.94 b. 20.50, 5.79 c. 20.85, 5.94 d. 20.85, 5.79
9. Sum of Squares for the Difference Scores A new form of cognitive therapy has been...
9. Sum of Squares for the Difference Scores A new form of cognitive therapy has been developed to treat the symptoms of depression. To determine the effectiveness of the treatment, depression scores were measured twice for each person in the sample - once before the therapy began (Pretest) and once after the therapy was completed (Posttest). The values below represent the Beck Depression Inventory scores for the two measurements (higher scores indicate higher levels of depression). Note that each row...
____________________________________________ The results of a sample of 372 subscribers to Wired magazine shows the time spent...
____________________________________________ The results of a sample of 372 subscribers to Wired magazine shows the time spent using the Internet during the week. Previous surveys have revealed that the population standard deviation is 10.95 hours. The sample data can be found in the Excel test data file. What is the probability that another sample of 372 subscribers spends less than 19.00 hours per week using the Internet? ____________________________________________ Develop a 95% confidence interval for the population mean ____________________________________________ If the editors...
A diet doctor claims that the average North American is more than 20 pounds overweight. To...
A diet doctor claims that the average North American is more than 20 pounds overweight. To test his claim, a random sample of 20 North Americans was weighed, and the difference between their actual and ideal weights was calculated. The data is listed below: 16 23 18 41 22 18 23 19 22 15 18 35 16 15 17 19 23 15 16 26 The sample statistics are: ?̅ = 20.85, ? = 6.76. Can we infer, at the 5%...
A particular drug is used to treat leukemia. A random sample of 30 patients had remission...
A particular drug is used to treat leukemia. A random sample of 30 patients had remission times in weeks listed below. 10 7 32 23 22 6 16 34 32 25 11 17 16 12 23 20 9 6 17 35 6 13 9 6 10 24 11 18 19 16 At a 0.05 level of significance, does the data indicate that the mean remission time of people using this drug is more than 13 weeks (close to 3 months)?...
A diet doctor claims that the average North American is more than 20 pounds overweight. To...
A diet doctor claims that the average North American is more than 20 pounds overweight. To test his claim, a random sample of 20 North Americans was weighed, and the difference between their actual and ideal weights was calculated. The data is listed below: 16 23 18 41 22 18 23 19 22 15 18 35 16 15 17 19 23 15 16 26 The sample statistics are: ?̅= 20.85, ? = 6.76. Can we infer, at the 5% significance...
A study was conducted to see if students’ writing skills continue to improve as the academic...
A study was conducted to see if students’ writing skills continue to improve as the academic year progresses. English 101 students were asked to write essays throughout the year in September, December, March and June. The scores were compared to see if there is any improvement in this one-year course. Was there a significant improvement? The appropriate test for this problem is: one-way ANOVA repeated measurements Student September December March June 1 17 23 21 24 2 25 21 21...
The results of a sample of 372 subscribers toWiredmagazine shows the time spent using the Internet...
The results of a sample of 372 subscribers toWiredmagazine shows the time spent using the Internet during the week. Previous surveys have revealed that the population standard deviation is 10.95 hours. The sample data can be found in the Excel test data file. What is the probability that another sample of 372 subscribers spends less than 19.00 hours per week using the Internet? Develop a 95% confidence interval for the population mean If the editors of Wiredwanted to have the...
The SAT and the ACT are the two major standardized tests that colleges use to evaluate...
The SAT and the ACT are the two major standardized tests that colleges use to evaluate candidates. Most students take just one of these tests. However, some students take both. The data data18.dat gives the scores of 60 students who did this. How can we relate the two tests? (a) Plot the data with SAT on the x axis and ACT on the y axis. Describe the overall pattern and any unusual observations. (b) Find the least-squares regression line and...
e SAT and the ACT are the two major standardized tests that colleges use to evaluate...
e SAT and the ACT are the two major standardized tests that colleges use to evaluate candidates. Most students take just one of these tests. However, some students take both. The data data76.dat gives the scores of 60 students who did this. How can we relate the two tests? (a) Plot the data with SAT on the x axis and ACT on the y axis. Describe the overall pattern and any unusual observations. (b) Find the least-squares regression line and...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT