 # Make a two-­way table that includes the marginal frequencies, math homework help Anonymous
timer Asked: Jun 28th, 2016
account_balance_wallet \$10

### Question Description

1. You randomly survey people in the mall about whether or not they regularly use text messaging. The results are shown in the tally sheets below based on the people’s ages.

Link to the tally sheets: http://www.intervisualtechnology.us/data/1/16381/textregular.jpg

a. Make a two-­way table that includes the marginal frequencies.

b. Make a two­-way table that shows both the joint and marginal relative frequencies. Round to the nearest hundredth, if necessary.

c. What is the probability that someone who is between the ages of 20-29 also texts regularly?

d. What is the probability that someone who is between the ages of 40-49 also texts regularly?

e. Does the data show a relationship between age and texting? Explain.

2. The data below represents the number of hits on your web site over 10 months. a. Make a scatter plot of ln ​y​ versus ​x​. Use the scatter plot to find the equation for the line of best fit.

b. Make a scatter plot of ln ​y​ versus ln ​x​. Use the scatter plot to find the equation for the line of best fit.

c. Based on your answers in part a and b, would an exponential model or a power model be better to represent this data? Explain.

d. Use your answers from parts a and b to find an exponential model and a power model to represent this data by hand.

e. Use the regression feature on your calculator to find an exponential model and a power model to represent this data.

f. Use your answer from parts c and d to make the ​best​ estimate for the number of hits your web site will have in 12 months.

vmohanakumar
School: Rice University   Here is the document.

1. You randomly survey people in the mall about whether or not they regularly use text
messaging. The results are shown in the tally sheets below based on the people’s ages.
Link to the tally sheets: http://www.intervisualtechnology.us/data/1/16381/textregular.jpg

a. Make a two-way table that includes the marginal frequencies.
Age
Texts regularly
Does not text regularly
Frequency
Frequency
20 – 29
30 – 39
40 – 49
Total

20
16
2
38

7
13
10
30

Total

27
29
12
68

b. Make a two-way table that shows both the joint and m...

flag Report DMCA  Review Anonymous
Goes above and beyond expectations ! Brown University

1271 Tutors California Institute of Technology

2131 Tutors Carnegie Mellon University

982 Tutors Columbia University

1256 Tutors Dartmouth University

2113 Tutors Emory University

2279 Tutors Harvard University

599 Tutors Massachusetts Institute of Technology

2319 Tutors New York University

1645 Tutors Notre Dam University

1911 Tutors Oklahoma University

2122 Tutors Pennsylvania State University

932 Tutors Princeton University

1211 Tutors Stanford University

983 Tutors University of California

1282 Tutors Oxford University

123 Tutors Yale University

2325 Tutors