Mathematics, 19.11.2019 05:31 heyhowdy
The librarian at the local elementary school claims that, on average, the books in the library are more than 20 years old. to test this claim, a student takes a sample of 30 books and records the publication date for each. the sample produces an average age of 23.8 years with a variance of 67.5. what test should you use to determine whether the average age of the library books is significantly greater than 20 years.
Answers: 1
Mathematics, 21.06.2019 15:00, vnzgirl
1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.
Answers: 1
Mathematics, 21.06.2019 17:20, tinyiaihfurlow
Match the equivalent expressions. x - 3y + 12 12 - 3y - 2x + x + 2x 3x + 2y - 2x + y + 12 3y + 12 3x + y - 12 4y + 3y + 3x - 6y - 10 - 2 x + 3y + 2x - 3x + 7 + 5 x + 3y + 12 5 + 2y + 7x - 4x + 3y - 17
Answers: 1
Mathematics, 21.06.2019 18:20, hihihi129473838
What is the y-intercept of the line given by the equation
Answers: 2
Mathematics, 21.06.2019 20:00, arianaaldaz062002
If the simple annual interest rate on a loan is 6, what is the interest rate in percentage per month?
Answers: 1
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