Weights of 10 red and 36 brown randomly chosen M{&}M plain candies are listed below.
Red:
|
0.907
|
0.897
|
0.912
|
0.891
|
0.874
|
|
0.936
|
0.898
|
0.913
|
0.871
|
0.923
|
Brown:
|
0.93
|
0.913
|
0.898
|
0.921
|
0.872
|
0.866
|
|
0.931
|
0.92
|
0.914
|
1.001
|
0.92
|
0.936
|
|
0.902
|
0.875
|
0.857
|
0.915
|
0.9
|
0.877
|
|
0.923
|
0.986
|
0.905
|
0.876
|
0.897
|
0.93
|
|
0.929
|
0.871
|
0.918
|
0.889
|
0.928
|
0.861
|
|
0.988
|
0.912
|
0.867
|
0.858
|
0.86
|
0.902
|
1. To construct a 90% confidence interval for the mean weight of red M{&}M plain candies, you have to use
A. The normal distribution
B. The t distribution with 10 degrees of freedom
C. The t distribution with 9 degrees of freedom
D. The t distribution with 11 degrees of freedom
E. None of the above
2. A 90% confidence interval for the mean weight of red M{&}M plain candies is
________ <μ< __________
3. To construct a 90% confidence interval for the mean weight of brown M{&}M plain candies, you have to use
A. The t distribution with 36 degrees of freedom
B. The t distribution with 37 degrees of freedom
C. The normal distribution
D. The t distribution with 35 degrees of freedom
E. None of the above
4. A 90% confidence interval for the mean weight of brown M{&}M plain candies is
__________ <μ< ____________