Mathematics, 12.03.2020 20:49 Xavitheking2542
Rick the receptionist claims that he types an average of 70 words per minute. In order to test this, Rick's boss gives him 15 different one minute typing challenges throughout the day. On each challenge, Rick's boss records the number of words typed. The boss calculates the sample mean to be 67 words per minute and the sample standard deviation to be 16 words per minute. He calculates a test statistic for the following hypothesis test:
H0: ?\u = 70
Ha: u (does not equal) 70
Assuming the null hypothesis is true, this test statistic will follow:
the t distribution with 16 degrees of freedom
the t distribution with 14 degrees of freedom
the t distribution with 15 degrees of freedom
the standard normal distribution
(the answer I have chosen the t distribution with 14 degrees of freedom
Answers: 1
Mathematics, 21.06.2019 15:30
Astore manager records the total visitors and sales, in dollars, for 10 days. the data is shown in the scatter plot. what conclusion can the store manager draw based on the data? question 3 options: an increase in sales causes a decrease in visitors. an increase in sales is correlated with a decrease in visitors. an increase in visitors is correlated with an increase in sales.
Answers: 1
Mathematics, 21.06.2019 23:20
Sophia wrote an equation to represent the revenue of a movie theater for one day. she let x represent the number of child tickets sold and y represents the nunver of adult tickets sold. if a child ticket cost $4, an adult ticket cost $6, and the total revenue for the daybwas $420, which equation could sophia use to represent the number of chikd and adult tickets that were sold?
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Mathematics, 22.06.2019 00:30
Which ordered pair identifies a point in quadrant iv? a) (2, 5) b) (0, 1) c) (-1, -1) d) (12, -5) which quadrant is (-4,-6) in? a) i. b) ii. c) iii. d) iv.
Answers: 3
Rick the receptionist claims that he types an average of 70 words per minute. In order to test this,...
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