Please answer as soon as possible, thank you! Aa Aa E 4. Chapter 17, Problem 12
ID: 3250284 • Letter: P
Question
Please answer as soon as possible, thank you!
Aa Aa E 4. Chapter 17, Problem 12 A researcher asks college students to evaluate three new cell phone designs However, the researcher suspects that college students may have criteria that are different from those used by older adults. To test this hypothesis, the researcher performs a study using a sample of n 60 older adults in addition to a sample of n 60 students. The distribution of preferences is as follows. Design 1 Design 2 Design 3 Student 27 20 13 60 Older Adult 21 34 60 48 54 18 Do the data indicate that the distribution of preferences for older adults is significantly different from the distribution for college students? Test with 05. (Use two decimal places.) Find the expected frequencies and compute the chi-square statistic. (Use two decimal places for fe and X2, three for each (fo fe)2/fe.) Cell fe)2/f Student-Design 1 27 Student-Design 2 20 student-Design 3 13 Older Adult-Design 1 21 Older Adult-Design 2 34 Older Adult-Design 3 5Explanation / Answer
from above:
X2 critcal value for 2 degree of freedom =5.991
X2 =7.9352
reject the null hypothesis; thre is a significant.............
Observed O design 1 design 2 design 3 Total student 27 20 13 60 older adult 21 34 5 60 Total 48 54 18 120 Expected E=rowtotal*column total/grand total design 1 design 2 design 3 Total student 24.000 27.000 9.000 60 older adult 24.000 27.000 9.000 60 Total 48 54 18 120 chi square =(O-E)^2/E design 1 design 2 design 3 Total student 0.375 1.8148 1.7778 3.968 older adult 0.375 1.815 1.778 3.968 Total 0.750 3.630 3.556 7.9352