Which of these samples is a valid random sample for the population given?
A.
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Mathematics, 22.06.2021 22:10 Stucklikechuck1703
Which of these samples is a valid random sample for the population given?
A.
Alia questions three students from her class to learn about the movie preferences of students in her school.
B.
Miles randomly surveys a group of customers at a coffee shop to understand the coffee consumption habits of 18- to 24-year-old Americans.
C.
Carson interviews students working part-time to gather data on the general spending habits of students.
D.
Lea speaks with the managers at half of the town’s 10 supermarkets, which stock similar items, to find out which breakfast cereal is most popular among the town's residents.
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(b) suppose that consolidated power decides to use a level of significance of α = .05, and suppose a random sample of 100 temperature readings is obtained. if the sample mean of the 100 temperature readings is x⎯⎯ = 60.990, test h0 versus ha and determine whether the power plant should be shut down and the cooling system repaired. perform the hypothesis test by using a critical value and a p-value. assume σ = 5. (round your z to 2 decimal places and p-value to 4 decimal places.)
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