Module 2, Week 3, Paper and Pencil Assignment 3
Module 2, Week 3, Paper and Pencil
Assignment 3
1.
You
have the following random sample containing information on customers at grocery
store. The sample standard deviation for the spending variable is equal to
116.82.
|
Customer |
$ spent |
Used shopping cart |
|
A |
21 |
No |
|
B |
205 |
No |
|
C |
109 |
Yes |
|
D |
43 |
No |
|
E |
58 |
No |
|
F |
302 |
Yes |
|
G |
99 |
Yes |
|
H |
18 |
No |
|
I |
91 |
Yes |
|
J |
120 |
Yes |
|
K |
390 |
Yes |
|
L |
44 |
No |
a)
Test
the hypothesis that mean spending is not equal to $190. Use a 5% level of
significance.
b)
Test
the hypothesis that mean spending is not equal to $190. Use a 10% level of
significance.
c)
Test
the hypothesis that mean spending is less than $200. Use a 5% level of
significance.
d)
Test
the hypothesis that mean spending is greater than $180. Use a 5% level of
significance.
e)
Calculate
a 95% confidence interval for mean spending.
f)
Test
the hypothesis that the proportion of customers who use a shopping cart is
greater than 0.60. Use a 5% level of significance.
g)
Test
the hypothesis that the proportion of customers who use a shopping cart is less
than 0.80. Use a 5% level of significance.
h)
Calculate
a 95% confidence interval for the proportion of customers who use a shopping
cart.
Comments
Post a Comment