A sample of 1000 adults was asked? "Do you buy clothes from your mobile? device?"
Male Female Total Buy clothes from their mobile device
Yes 225 275 500
No 275 225 500
Total 500 500 1000
a. Is there evidence of a significant difference between the proportion of males and females who say they buy clothing from their mobile devices at the 0.005 level of? significance?
Calculate the test statistic
χ2STAT= 10.000
?(three decimal places)
b. Determine the? p-value in? (a)
p=0.002
What if 280 males say they buy clothing from their mobile device and 220 did? not?
Calculate the new test statistic.
χ2STAT=
What is the critical value for the 0.005 level of? significance?
The new? p-value = ?(three decimal places)