BSTAT 3321 Chapter 7 with 100%
complete solutions
Beer bottles are filled so that they contain an average of 480 ml of beer in each bottle. Suppose
that the amount of beer in a bottle is normally distributed with a standard deviation of 7 ml. -
correct answer ✔✔
Nonresponse bias occurs when ______. - correct answer ✔✔
At an exhibit in the Museum of Science, people are asked to choose between 90 or 175 random
draws from a machine. The machine is known to have 91 green balls and 98 red balls. After each
draw, the color of the ball is noted and the ball is put back for the next draw. You win a prize if
more than 55% of the draws result in a green ball. - correct answer ✔✔
Bias can occur in sampling. Bias refers to ______. - correct answer ✔✔
Selection bias occurs when ______. - correct answer ✔✔
A recent survey found that 82% of college graduates believe their degree was a good
investment (cnbc.com, February 27, 2020). Suppose a random sample of 100 college graduates
is taken. - correct answer ✔✔
A car manufacturer is concerned about poor customer satisfaction at one of its dealerships. The
management decides to evaluate the satisfaction surveys of its next 62 customers. The
dealership will be fined if the number of customers who report favorably is between 45 and 50.
The dealership will be dissolved if fewer than 45 customers report favorably. It is known that
84% of the dealership's customers report favorably on satisfaction surveys. - correct answer ✔✔
complete solutions
Beer bottles are filled so that they contain an average of 480 ml of beer in each bottle. Suppose
that the amount of beer in a bottle is normally distributed with a standard deviation of 7 ml. -
correct answer ✔✔
Nonresponse bias occurs when ______. - correct answer ✔✔
At an exhibit in the Museum of Science, people are asked to choose between 90 or 175 random
draws from a machine. The machine is known to have 91 green balls and 98 red balls. After each
draw, the color of the ball is noted and the ball is put back for the next draw. You win a prize if
more than 55% of the draws result in a green ball. - correct answer ✔✔
Bias can occur in sampling. Bias refers to ______. - correct answer ✔✔
Selection bias occurs when ______. - correct answer ✔✔
A recent survey found that 82% of college graduates believe their degree was a good
investment (cnbc.com, February 27, 2020). Suppose a random sample of 100 college graduates
is taken. - correct answer ✔✔
A car manufacturer is concerned about poor customer satisfaction at one of its dealerships. The
management decides to evaluate the satisfaction surveys of its next 62 customers. The
dealership will be fined if the number of customers who report favorably is between 45 and 50.
The dealership will be dissolved if fewer than 45 customers report favorably. It is known that
84% of the dealership's customers report favorably on satisfaction surveys. - correct answer ✔✔
