Mathematics, 03.01.2020 04:31 Aggie9341
An advertisement for a word-processing class claims that students who complete the class will, on average, be able to type 60 words per minute (wpm) with a standard deviation of 6 wpm. at the end of the class, 49 students are tested and their mean score is 58.5 wpm.
a. is this evidence that the true mean is different from 60 wpm? give a complete answer, using a significance level of .05. (12 points)
b. suppose the person conducting the research had believed, before collecting data, that the graduates weren't as good as claimed. would this belief have changed the analysis you performed in part (a)? (12 points)
c. construct a 99% confidence interval for the true mean of the population. what conclusion can you draw from this interval, and do you have evidence to reject the claim that the average graduate can type 60 wpm? (6 points)
Answers: 2
Mathematics, 21.06.2019 18:30, hsjsjsjdjjd
Iam a rectangle. my perimeter is 60 feet. how much are do i cover?
Answers: 1
Mathematics, 21.06.2019 20:00, karamalqussiri478
The weight v of an object on venus varies directly with its weight e on earth. a person weighing 120 lb on earth would weigh 106 lb on venus. how much would a person weighing 150 lb on earth weigh on venus?
Answers: 1
Mathematics, 21.06.2019 23:30, xelynncaldera
In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.
Answers: 1
An advertisement for a word-processing class claims that students who complete the class will, on av...
Mathematics, 27.01.2021 19:30
Mathematics, 27.01.2021 19:30
Mathematics, 27.01.2021 19:30
Mathematics, 27.01.2021 19:30