Answer:
test stat=1.7986
p value =0.0391
Step-by-step explanation:
given
n=50
d = 7.3
s d = 28.7
formula to calculate test statistic
t=
⇒ t=
⇒t=1.7986
for 49 df and t=1.7986 ,p value can be obtained from software
p value=0.0391
Answer:
The online survey has large biases concerning representativeness. Regarding the behavioural characteristics of consumers, the face-to-face data delivers the best results, followed by the telephone interviews and finally the online survey.
Face-to-face surveys still deliver the most representative results. Telephone surveys may provide a good alternative, but we would advise use of a larger sample. The online survey needs to be corrected, one should relinquish representativeness.
The correct answer is second one
54 buttons ÷ 9 button cards = 6
She should buy 6 cards of buttons.
