MATH 225N WEEK EIGHT LINEAR REGRESSION
PREDICTION ASSIGNMENT COMPLETE
SOLUTION SET 2026
◉ In which of the following situations can multiple regression be
performed? Select all that apply. Answer: - predicting the current salary
of an employee, given the initial salary and the number of years the
employee has been in his or her current position
- predicting the number of home runs a baseball player will hit in the
next season, given the number of home runs the player hit in the
previous season and the number of doubles the player hit in the previous
season
◉ Timothy wants to estimate the mean number of siblings for each
student in his school. He records the number of siblings for each of 75
randomly selected students in the school. What is the statistic? Answer:
the mean number of siblings for the randomly selected students
◉ Which of the following results in the null hypothesis μ=38 and
alternative hypothesis μ<38? Answer: A fitness center claims that the
mean amount of time that a person spends at the gym per visit is fewer
than 38 minutes.
◉ If A and B are independent events with P(A)=0.4 and P(B)=0.5, find
P(A AND B). Answer: 0.2
