7 Answered Questions for the topic Sample

04/01/21

Which of the following correctly labels the population?
A farmer sows 100 seeds of a new type of corn and wants to quickly determine the yield, or total number of ears of corn, for the crop when it has matured. He decides to take a simple random sample... more
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01/29/21

Can you interpret a confidence interval without knowing the population mean?
If we don't know the population mean, could we still make a precise interpretation of the confidence interval? For example, would we still be able to say that there is a 90% chance that the... more
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12/09/20

What is the test statistic for this problem? Please help!!
The marital status distribution of the U.S. male population, age 15 and older, is as shown below.Marital Status Percent never... more
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06/12/20

Statistics with confidence intervals

A random sample of 80 college students was asked, “How many hours do you study each week?” After gathering the data, the sample has a mean of 14 hours and a standard deviation of 2.8 hours.... more
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10/18/16

Mean or Proportion?!
1. Chips Ahoy wants to perform a study to determine the number of chocolate chips in their cookies. To that end, they collected a sample of 40 cookies. The mean of this sample is 23.95 chocolate... more
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Sample

06/20/16

You think that the population proportion of voters who will vote for your candidate is 0.50
You are the manager of a political campaign. You think that the population proportion of voters who will vote for your candidate is 0.50 (use this for a planning value). Your candidate wants to... more
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Sample

04/05/16

a. Describe the sampling distribution of x¯. b.what is P(x¯<62.6) c.what is P(x¯>68.7) d. what is P(59.8<x¯<65.9)
A simple random sample size n= 36 is obtained from a population with m= 64 and o= 18. a. Describe the sampling distribution of x¯. b.what is P(x¯<62.6) c.what is P(x¯>68.7) d. what is... more
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