Homework SourseA marketing firm asked a random set of married and single me
A marketing firm asked a random set of married and single men how much they were willing to spend on a vacation. At = 0.05 and assuming normal distributions what is critical value to test a difference in the two amounts?
A) -1.65
B) -1.96
C) ±1.65
D) ±1.96
| Married men | Single men | |
| Sample size | 50 | 40 |
| Sample mean | $640 | $665 |
| Population variance | 5700 | 9100 |
Solution
The problem says \"test a \"difference\" in the two amounts\", which means that it is two tailed.
Thus, for a two tailed, 0.05 level test, the critical values are
OPTION D: +/- 1.96 [ANSWER]
