Q1.

In a study of pain relievers, 100 people were given product A, and all but 34 experienced relief. In the same study, 20 people were given product B, and all but 6 experienced relief.

Fill in the blanks below to make the most reasonable statement possible.

Product ?(Choose one - A, B) performed worse in the study. That is because only % got relief with this product, whereas % got relief with Product ?(Choose one - A, B)).

Q2.

After the premiere of the new comedy Bumblebee, moviegoers were asked in a quick poll whether they liked the movie. Out of 50 adults, all but 16 said they liked the movie, whereas out of 25 teenagers, all but 5 said they liked the movie.

Fill in the blanks below to make the most reasonable statement possible.

At the movie premiere, ?(Choose one - adult, teenage) moviegoers liked the movie less. That is because only %

liked the movie, whereas % of the ?(Choose one - adult, teenage) moviegoers liked the movie.

Q3.

A researcher wishes to estimate the proportion of X-ray machines that malfunction. A random sample of 200

machines is taken, and 60 of the machines in the sample malfunction. Based upon this, compute a 99%

confidence interval for the proportion of all X-ray machines that malfunction. Then find the lower limit and upper limit of the 99% confidence interval.

Carry your intermediate computations to at least three decimal places. Round your answers to two decimal places.

Lower limit:
Upper limit:

Q4.

A random sample of 200 adults was given an IQ test. It was found that 110 of them scored higher than 100. Based on this, compute a 90% confidence interval for the proportion of all adults whose IQ score is greater than

100. Then find the lower limit and upper limit of the 90% confidence interval.

Carry your intermediate computations to at least three decimal places. Round your answers to two decimal places.

Lower limit:
Upper limit:

Q5.

We want to conduct a hypothesis test of the claim that the population mean number of holding penalties during a college football game is more than 2.4 penalties per game. So, we choose a random sample of games. The sample has a mean of 2.5 penalties per game and a standard deviation of 0.8 penalties per game. For each of the following sampling scenarios, choose an appropriate test statistic for our hypothesis test on the population mean. Then calculate that statistic. Round your answers to two decimal places. (a) The sample has size 18, and it is from a normally distributed population with an unknown standard deviation. oz=D ot= Q It is unclear which test statistic to use. (b) The sample has size 19, and it is from a normally distributed population with a known standard deviation of 0.75. oz=D ot=U Q It is unclear which test statistic to use. We want to conduct a hypothesis test of the claim that the population mean germination time of strawberry seeds is different from 15.9 days. So, we choose a random sample of strawberries. The sample has a mean of 16 days and a standard deviation of 1.5 days. For each of the following sampling scenarios, choose an appropriate test statistic for our hypothesis test on the population mean. Then calculate that statistic. Round your answers to two decimal places. (a) The sample has size 105, and it is from a non-normally distributed population with a known standard deviation of 1.4. oz=D OI=D Q It is unclear which test statistic to use. (b) The sample has size 12, and it is from a population with a distribution about which we know very little. OZ=U ot=D Q It is unclear which test statistic to use