## NASA is conducting an experiment to find out the fraction of people who black out at G forces greater than 6

NASA is conducting an experiment to find out the fraction of people who black out at G forces greater than 6. Suppose a sample of 543 People is drawn. Of these people, 217 passed out at G forces greater than 6. Using the data, estimate the proportion of people who pass out at more than 6 Gs. Enter your answer as a fraction or a decimal number rounded to three decimal places.

## A technician working for the Chase-National Food Additive Company would like to estimate the preserving ability of a new additive

A technician working for the Chase-National Food Additive Company would like to estimate the preserving ability of a new additive. This additive will be used for Auntie’s brand preserves. Based on past tests, it is believed that the time to spoilage for this additive has a standard deviation of 8 days. To be 95% confident of the true mean time to spoilage, what sample size will be needed to estimate the mean time to spoilage with an accuracy of one day?

## In a sample of 54 walking canes, the average length was found to be 36.1in. with a variance of 2.2

In a sample of 54 walking canes, the average length was found to be 36.1in. with a variance of 2.2
. Give a point estimate for the population variance of the length of the walking canes. Round your answer to two decimal places, if necessary.

## A travel agent is interested in the average price of a hotel room during the summer in a resort community

A travel agent is interested in the average price of a hotel room during the summer in a resort community. The agent randomly selects 18 hotels from the community and determines the price of a regular room with a king size bed. The average price of the room for the sample was \$150 with a standard deviation of \$40. Assume the prices are normally distributed. Construct an interval to estimate the true average price of a regular room with a king size bed in the resort community with 99% confidence. Round the endpoints to two decimal places, if necessary.