Mathematics, 18.10.2019 21:30, Theyfall4raven
In 2010, the average duration of long-distance telephone calls originating in one town was 9.4 minutes. a long-distance telephone company wants to perform a hypothesis test to determine whether the average duration of long-distance phone calls has changed from the 2010 mean of 9.4 minutes. the mean duration for a random sample of 50 calls originating in the town was 8.6 minutes. does the data provide sufficient evidence to conclude that the mean call duration, µ, is different from the 2010 mean of 9.4 minutes? perform the appropriate hypothesis test using a significance level of 0.01. assume that s = 4.8 minutes.
Answers: 3
Mathematics, 21.06.2019 18:40, calebhoover03
2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?
Answers: 1
Mathematics, 21.06.2019 20:40, guyfromnasa
Which questions would most a reader identify the author's purpose for writing? check all that apply. what type of text is this? what type of reviews did the book receive? how many copies of the book have been sold? what is the central idea? how does this text make one feel?
Answers: 2
Mathematics, 21.06.2019 21:10, lizbeth696
The vertices of a triangle are a(7.5), b(4,2), and c19. 2). what is
Answers: 1
In 2010, the average duration of long-distance telephone calls originating in one town was 9.4 minut...
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