What is the margin of error (the value you subtract from the mean for lower limit, and add to the mean to obtain the upper limit) on a 95% confidence interval for a population mean o = 7 and n = 36? QUESTION 4 O a. 2.29 O b.0.38 O C. 1.92 O d. 13.72

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A: Given: Margin of error (E) = 3 σ=23 Confidence interval = 97%

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Q: Which of the following would increase the width of a confidence interval for a population mean?

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A: The given confidence level is 90%, 95% and 99%.

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Q: In a survey, 20 people were asked how much they spent on their child's last birthday gift. The…

A: Givensample size(n)=20mean(x¯)=46standard deviation(s)=10α=1-0.99=0.01α2=0.005Degrees of…

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Q: 26 randomly selected students took the calculus final. If the sample mean was 90 and the standard…

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Q: The following data represent the concentration of organic carbon (mg/L) collected from organic soil.…

A: From the given information n=20x=18.37s=7.5α=0.99 The degrees of freedom df=n-1=20-1=19 We can use…

Q: In a survey, 10 people were asked how much they spent on their child's last birthday gift. The…

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Q: Suppose someone wanted an 75%-confidence interval. What value of z should they use? Choose the…

A: Level of significance ɑ=0.25

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Q: In a survey, 25 people were asked how much they spent on their child's last birthday gift. The…

A: Givensample size(n)=25Mean(x)=36standard deviation(s)=3confidence level = 99%

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Q: The Statistics Games are played by a large number of teams across the county. Teams raise money to…

A: Sample mean (x̄) =  $ 375 , standard deviation    (s) = $ 32 and sample size (n) = 36 Then,

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