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.
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Mathematics, 21.06.2019 13:40
1c-2 m405 what values are needed to make each expression a perfect square trinomial? 32 + 2x+ 2-20x + 22+5x+
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Mathematics, 21.06.2019 17:30
Danielle earns a 7.25% commission on everything she sells at the electronics store where she works. she also earns a base salary of $750 per week. what were her sales last week if her total earnings for the week were $1,076.25?
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Mathematics, 21.06.2019 19:00
Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 20 = x a. 5, 4 b. -5, -4 c. -5, 4 d. 5, -4
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Mathematics, 21.06.2019 20:00
Someone answer asap for ! max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a. the median of max’s data is 250 b. more than half of the data points max recorded were 177 centimeters. c. a data point chosen at random is as likely to be above the mean as it is to be below the mean. d. every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.
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In 2010, the average duration of long-distance telephone calls originating in one town was 9.4 minut...
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