Homework SourseExample 1 In a nationwide opinion poll based on a random sam
Example 1. In a nationwide opinion poll based on a random sample of 240 people, one question is:
Solution
H0: mean=1
H1: mean not eqaul to 1
z=xbar-mean/s/srt(n)
p< 0.05, so we reject the null hypothesis.
| 1.000 | hypothesized value | |
| 3.100 | mean label | |
| 0.900 | std. dev. | |
| 0.058 | std. error | |
| 240 | n | |
| 36.15 | z | |
| 0.00E+00 | p-value (two-tailed) |
