Question

A study of identity theft looked at how well consumers protect themselves from this increasingly prevalent crime. The behaviors of 61 college students were compared with the behaviors of 58 nonstudents. One of the questions was "When asked to create a password, I have used either my mother's maiden name, or my pet's name, or my birth date, or the last four digits of my social security number, or a series of consecutive numbers." For the students, 22 agreed with this statement while 27 of the nonstudents agreed.

Perform the chi-square test. (Round your χ² to three decimal places and round your P-value to four decimal places.)

B) χ² =

C) df=

D) P-value=

Reanalyze the data using the methods for comparing two proportions that we studied in the previous chapter. Compare the results and verify that the chi-square statistic is the square of the z statistic. (Test students who agreed minus nonstudents who agreed. Round your z to two decimal places and round your P-value to four decimal places.\

E) Z-value=

F) P-value=

Answer 1

applying chi square test:

Observed	Oi	student	non student	Total
	agreed	22	27	49
	not agreed	39	31	70
	Lawyer	61	58	119
Expected	Ei=row total*column total/grand total	student	non student	Total
	agreed	25.118	23.882	49
	not agreed	35.882	34.118	70
	Lawyer	61	58	119
chi square    χ2	=(Oi-Ei)2/Ei	student	non student	Total
	agreed	0.3870	0.4070	0.794
	not agreed	0.2709	0.2849	0.556
	Lawyer	0.658	0.692	1.350

b)test statistic X² =1.350

c)df=1

d) p value =0.2453

e ) z value =1.16

f) p value =0.2453