In a sample of 320 adults, 186 had children. Construct a 90% confidence interval for the true population proportion of adults with children.
_________________ < p < ________________________
You measure 40 backpacks' weights, and find they have a mean weight of 76 ounces. Assume the population standard deviation is 11.1 ounces. Based on this, construct a 99% confidence interval for the true population mean backpack weight.
Decimals to two places
______________________ +- ____________________ ounces
The p-value for a hypothesis test turns out to be 0.09802. At a 10% level of significance, what is the proper decision.
- Reject Ho
- Fail to reject Ho