Statistics Questions & Answers

Suppose \( Z \) follows the standard normal distribution. Use the calculator provided, or this table, to determine the value of \( c \) so that the following is true. \( P(c \leq Z \leq-0.95)=0.1523 \) Carry your intermediate computations to at least four decimal places. Round your answer to two decimal places.

A corporation that maintains a large fleet of company cars for the use of its sales staff is interested in the mean distance driven monthly per salesperson. The following list gives the monthly distances in miles driven by a random sample of 13 salespeople. \( 2333,1979,2364,2113,2135,2363,2168,1987,1997,2441,2690,1950,2603 \) Send data to calculator Bend data to Excel driving distances are normally distributed. Give 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 one decimal place. (If necessary, consult a list of formulas.) Lower limit: Upper limit:

A random sample of 13 health maintenance organizations (HMOs) was selected. For each HMO, the co-payment (in dollars) for a doctor's office visit was recorded. The results are as follows. \( 43,54,40,26,53,52,26,25,28,27,39,39,35 \) Send data to calculator) Send data to Excel: Under the assumption that co-payment amounts are normally distributed, find a \( 99 \% \) confidence interval for the mean co-payment amount in dollars. Glve 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 one decimal place. (If necessary, consult a list of formulas.) Lower limit: Upper limit:

Suppose \( Z \) follows the standard normal distribution. Use the calculator provided, or this table, to determine the value of \( c \) so that the following is true. \[ P(0.85 \leq Z \leq c)=0.1640 \] Carry your intermediate computations to at least four decimal places. Round your answer to two decimal places.

Standard normal values: Advanced Suppose \( Z \) follows the standard normal distribution. Use the calculator provided, or this table, to determine the value of \( c \) so that the following is true. Carry your intermediate computations to at least four decimal places. Round your answer to two decimal places. S

Suppose \( Z \) follows the standard normal distribution. Use the calculator provided, or this table, to determine the value of \( c \) so that the following is true. \( P(-1.23 \leq Z \leq c)=0.8632 \) Carry your intermediate computations to at least four decimal places. Round your answer to two decimal places.

Suppose Z follows the standard normal distribution. Use the calculator provided, or this table, to determine the value of \( c \) so that the following is true. \( \mathrm{P}(\mathrm{c} \leq \mathrm{Z} \leq-0.97)=0.1514 \) Carry your intermediate computations to at least four decimal places. Round your answer to two decimal places.

Standard normal values: Advanced Suppose Z follows the standard normal distribution. Use the calculator provided, or this table, to determine the value of c so that the following is tru \( \mathrm{P}(-0.73 \leq \mathrm{Z} \leq \mathrm{C})=0.7530 \) Carry your intermediate computations to at least four decimal places. Round your answer to two decimal places.

Suppose \( Z \) follows the standard normal distribution. Use the calculator provided, or this table, to determine the value of \( c \) so that the following is true \( P(c \leq Z \leq 0.93)=0.8088 \) Carry your intermediate computations to at least four decimal places. Round your answer to two decimal places. P

uppose \( Z \) follows the standard normal distribution. Use the calculator provided, or this table, to determine the value of \( c \) so that the following is true. \( P(1.08 \leq \mathrm{Z} \leq \mathrm{C})=0.1184 \) Carry your intermediate computations to at least four decimal places. Round your answer to two decimal places.