Mathematics, 28.11.2019 00:31 ethanyayger
Ccn and actmedia provided a television channel targeted to individuals waiting in super- market checkout lines. the channel showed news, short features, and advertisements. the length of the program was based on the assumption that the population mean time a shopper stands in a supermarket checkout line is 8 minutes. a sample of actual waiting imes will be used to test this assumption and determine whether actual mean waiting time differs from this standard
(1) formulate the hypotheses for this application.
(2) a sample of 120 shoppers showed a sample mean waiting time of 8.5 minutes. assume a population standard deviation of σ 3.2 minutes. what is the p-value?
(3) at a .05, what is your conclusion?
(4) using the critical value approach to test the hypothesis again, if α = 0.05.
(5) compute a 95% confidence interval for the population mean. does it support your conclusion?
Answers: 3
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Mathematics, 21.06.2019 22:30
9.4.34 question to estimate the height of a stone figure, an observer holds a small square up to her eyes and walks backward from the figure. she stops when the bottom of the figure aligns with the bottom edge of the square, and when the top of the figure aligns with the top edge of the square. her eye level is 1.811.81 m from the ground. she is 3.703.70 m from the figure. what is the height of the figure to the nearest hundredth of a meter?
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Mathematics, 22.06.2019 01:00
Which of the following statements is true? a. the irrational number system is not closed under multiplication, because the product of two irrational numbers is always a rational number. b. the irrational number system is not closed under multiplication, because the product of two irrational numbers is not always an irrational number. c. the irrational number system is closed under multiplication, because the product of two irrational numbers is always an irrational number. d. the irrational number system is closed under multiplication, because the product of two irrational numbers is always a rational numbers. reset submit
Answers: 1
Ccn and actmedia provided a television channel targeted to individuals waiting in super- market chec...
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