ions. Write your answers on a sheet of paper. 1. The mean and standard deviation of n measurements randomly sampled from a normally distributed population are 33 and 4, respectively. Construct a 95% confidence interval for the population mean for each given n. n = 5 a. b. n=15 C. n= 20 Five learners from th

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Q: For a population data set, σ = 13.3 . How large a sample should be selected so that the margin of…

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Q: You draw a sample of size 30 from a normally distributed population with a standard deviation of…

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A: n = 21  s​ = 12.6 confidence interval = 80%.

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Q: 1. The principal randomly selected six students to take an aptitude test. Their scores were: 81.6…

A: Given data is appropriate for t-test for single mean . because it is a small sample test .(n<30)

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A: confidence interval calculation

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Q: A sample of 64 was taken from a population, with the mean of the sample being 25 and the standard…

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Q: A 95% confidence interval for mean was found to be (18.54, 21.22). What was the margin of error? O…

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Q: 7.38 Potential insurance fraud? Insurance adjusters are concerned about the high estimates they are…

A: Solution To find the confidence interval we will use t distribution.

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Q: Consider the following random sample from a normal population: 14, 10, 13, 16, 12, 18, 15, and 11.…

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Q: Which estimate at a 95% confidence level most likely comes from a small sample? OA. 78% (14%) OB.…

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Q: 3 - The mean of a chance sample with n=25 volume is X ̅=60. Given that the standard deviation of the…

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Q: For a population data set, σ = 13.0 . How large a sample should be selected so that the margin of…

A: Given, As per z-distribution table, the zcrit value for 96% confidence level is obtained as 2.05.

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Q: 1) Construct a 95% confidence interval estimate for the population mean given that s =30 , x = 45…

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Q: You are told that a 95% confidence interval for the population mean is 17.3 to 24.5. If the…

A: we have to identify true or false.

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Q: Suppose we have a population that is approximately normal with standard deviation a=2.4 If we want…

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Q: A sample of 64 is taken from a population, with the mean of the sample being 119 and the standard…

A: Option B is correct (113, 125)

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