Statistics Questions & Answers

Exercise 1: One hundred subjects in a psychological study had a mean score of \( M=35 \) on a test instrument designed to measure anger. The standard deviation of the \( n=100 \) test scores was \( \sigma=10 \). Find: a. A \( 99 \% \) confidence interval for the mean of the population the sample was selected.

A certain magazine published a study on how well firefighter gloves fit. In a group of 586 firefighters who reported their glove size, the researchers determined whether the gloves fit well or poorly, by gender. The data are summarized in the accompanying table. Consider the gender and glove fit status of a randomly selected firefighter. Complete parts a through f . A. male and glove fits well, male and glove fits poorly, female and glove fits well, female and glove fits poorly B. male and glove fits well, female and glove fits well C. male and glove fits well, male and glove fits poorly, female and glove fits well, female and glove fits poorly, no response D. male, female, glove fits well, glove fits poorly

A certain magazine published a study on how well firefighter gloves fit. In a group of 586 firefighters who reported their glove size, the researchers determined whether the gloves fit well or poorly, by gender. The data are summarized in the accompanying table. Consider the gender and glove fit status of a randomly selected firefighter. Complete parts a through \( f \). A. male and glove fits well, male and glove fits poorly, female and gitve fits well, female and glove fits poorly B. male and glove fits well, female and glove fits well C. male and glove fits well, male and glove fits poorly, female and glove fits well, female and glove fits poorly, no response D. male, female, glove fits well, glove fits poorly

In a sample of 1995 adults from a certain region, 1505 reported that they currently receive cable or satellite TV service at home, 198 revealed that they have never subscribed to a cable/satellite TV service at home, and 292 admitted that they are "cord cutters," i.e., they canceled the cable/satellite TV service. One of the surveyed adults is randomly selected and his or her cable TV subscription status is determined. Complete parts a through d . \( \begin{array}{ll}\text { A. } 0.246,0.901,0.854 & \text { B. } 0.146,0.099,0.754 \\ \text { C. } 0.333,0.333,0.333 & \text { D. } 0.754,0.099 \\ \text { E. } 0.754,0.099,0.146 & \text { F. } 0.099,0.146\end{array} \) sample points found in part a, rounding to three decimal places. Choose the correct answer below. \( \begin{array}{ll}\text { E. } \\ \begin{array}{l}\text { E. }\end{array}\end{array} \)

In a sample of 1995 adults from a certain region, 1505 reported that they currently receive cable or satellite TV service at home, 198 revealed that they have never subscribed to a cable/satellite TV service at home, and 292 admitted that they are "cord cutters," i.e., they canceled the cable/satellite TV service. One of the surveyed adults is randomly selected and his or her cable TV subscription status is determined. Complete parts a through d. a. Identify the sample points for this study. Choose the correct answer below. A. Currently receives cable/satellite TV service, Canceled cable/satellite TV service B. Currently receives cable/satellite TV service, Never received cable/satellite TV service C. Currently receives cable/satellite TV service, Never received cable/satellite TV service, Canceled cable/satellite TV service

The number of goals scored by the Tailulu college First X1 girls soccer team in their 25 matches last season were \( 2,3,1,4,2,1,1,0,3,1,2,1,1,2,4,5,0,1,2,3,0,2,1,3,2 \) Fi. Find the range \( \begin{array}{l}5 \text { - } 0 \\ =5\end{array} \)

What is the median of the following string of values? \( 75,2,44,27,8,91,18,46,38,62 \) A. 38 B. 46 C. 44 D. 41

Savannah decides to research the relationship between the length in inches and the weight of a certain species of catfish. She measures the length and weight of a number of specimens she catches, then throws back into the water. After plotting all her data, she draws a line of best fit. Based on the line of best fit, what would you predict to be the length of a catfish that weighed 36 pounds?

An apple chew was selected 13 times. A strawberry chew was selected 6 times. A lime chew was selected 15 times.

Truly Amazing Dudes are a group of comic acrobats. The heights (in inches) of the ten acrobats are as follows. 697968717870676568 (a) Find the mean and sample standard deviation of the heights. (Round your answers to one decimal place.) mean standard deviation 23.8