Question

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

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
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
____________________________________________ 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 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...
Assuming that the population standard deviation is unknown, calculate the 95% confidence interval of the population...
Assuming that the population standard deviation is unknown, calculate the 95% confidence interval of the population mean. The following is the data. Calculating Process should be shown by Excel (Formulas). What formulas in statistics are used? 7 21 23 24 18 16 2 19 11 6 3 13 17 9 5 12 13 17 4 14 15 25 12 24 22 14 14 20 15 11 26 17 21 11 4 13 16 14 13 14 25 23 9 15...
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...
A random sample of 11 truant students produced the following data, where x is the number...
A random sample of 11 truant students produced the following data, where x is the number of classes missed, and y is the final exam score (out of a maximum of 75 points). The data are presented below in the table of values. x y 10 54 11 41 12 37 14 36 15 29 16 28 18 28 19 26 22 19 25 19 26 18 What is the equation of the regression line? Select the correct answer below:...
A sample of 200 ROM computer chips was selected on each of 30 consecutive days, and...
A sample of 200 ROM computer chips was selected on each of 30 consecutive days, and the number of nonconforming chips on each day was as follows: 10, 21, 26, 18, 38, 20, 5, 23, 11, 22, 28, 12, 14, 22, 20, 19, 16, 25, 10, 17, 14, 17, 15, 22, 29, 15, 9, 19, 16, 25 Calculate pbar = LCL = UCL =
Consider the following data from a random sample: 23 12 26 14 20 25 14 11...
Consider the following data from a random sample: 23 12 26 14 20 25 14 11 21 14 25 21 22 21 8 19 17 22 17 16 a.) Construct a stem-and-leaf plot and specify the five-number index (min, Q1, Q2, Q3, & max) b.) Compute the mean and the standard deviation c.) Find a 95% confidence interval for the population mean.
A company has the following returns over the past 30 months: Month Ret.(%) Month Ret.(%) Month...
A company has the following returns over the past 30 months: Month Ret.(%) Month Ret.(%) Month Ret.(%) 1) 3 11   -3 21 -1 2) -16 12 -2 22 -24 3) 31 13 -8 23 -14 4) 33 14 2 24 -19 5) -23 15 35 25 -19 6) -17 16 11 26 33 7) 8 17 -20 27 -18    8) -19 18 15 28 23 9) -13 19 -12 29 6 10 -17 20 17 30 5 What is...
Consider the following data: 25 24 18 20 21 18 16 20 23 17 15 13...
Consider the following data: 25 24 18 20 21 18 16 20 23 17 15 13 19 23 24 20 16 26 21 24 15 22 16 12 20 23 19 26 20 25 21 19 21 25 23 26 21 19 20 14 (a) Develop a frequency distribution using classes of 12-14, 15-17, 18-20, 21-23, and 24-26. Class Frequency   12-14   15-17   18-20   21-23   24-26     Total (b) Develop a relative frequency distribution and a percent frequency distribution using the classes...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT