3) If a confidence level of 80% is being used to construct a confidence interval, then what would be the value of alpha? Answer in decimal form.

4)If a confidence level of 95.44% is being used to construct a confidence interval, then what would be the value of alpha? Answer in decimal form.

5) A confidence interval for the average adult male height is to be constructed at a 95% confidence. If the population deviation for the data in question is 4.3 inches, and the researcher desires a margin of error of 0.25 inches, then what should be the sample size?

6) Aconfidence interval for the average healthy human body temperature is to be constructed at a 90% confidence. If the population deviation for the data in question is 0.30degrees F, and the researcher desires a margin of error of 0.04degrees F, then what should be the sample size?

7)A sample of weights of 70 boxes of cereal yield a sample average of 18.0 ounces. What would be the margin of error for a 95% CI of the average weight of all such boxes if the population deviation is 0.70 ounces?

8)A sample of heights of 142 American men yield a sample average of 58.12 inches. What would be the margin of error for a 99.74% CI of the average height of all such men if the population deviation is 4.5 inches?

9)If a sample average is found to be 98.64, and the margin of error is calculated to be 0.02, then the upper end of the confidence interval for mu would be ______

10) A 98% confidence interval for the average height of the adult American male if a sample of 338 such males have an average height of 57.1 inches with a population deviation of 4.8 inches. round to the nearest hundredth of an inch

11)A 95% confidence interval for the average waiting time at the drive-thru of a fast food restaurant if a sample of 115 customers have an average waiting time of 107 seconds with a population deviation of 33 seconds round to the nearest hundredth of a second

12)A 90% confidence interval for the average lifespan of the large tortoise if a sample of 50 such animals have an average life of 81 years with a population deviation of 18 years round to the nearest hundredth of a year