Use the sample information = 36, o = 4, n= 13 to calculate the following confidence intervals for u assuming the sample is from a normal population. (a) 90 percent confidence. (Round your answers to 4 decimal places.) The 90% confidence interval is from to (b) 95 percent confidence. (Round your answers to 4 decimal places.) The 95% confidence interval is from to (c) 99 percent confidence. (Round your answers to 4 decimal places.) The 99% confidence interval is from 331422 to 38.8578

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Use the sample information = 36 , 0 = 4, n= 13 to calculate the following confidence intervals forp assuming the sample is from a
normal population.
(a) 90 percent confidence. (Round your answers to 4 decimal places.)
The 90% confidence interval is from
to
(b) 95 percent confidence. (Round your answers to 4 decimal places.)
The 95% confidence interval is from
to [
(c) 99 percent confidence. (Round your answers to 4 decimal places.)
The 99% confidence interval is from 331422 to 38 8578
(d) Describe how the intervals change as you increase the confidence level
O The interval gets narrower as the confidence level increases.
O The interval gets wider as the confidence level decreases.
O The interval gets wider as the confidence level increases
O The interval stays the same as the confidencelevel increases.
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Transcribed Image Text:Use the sample information = 36 , 0 = 4, n= 13 to calculate the following confidence intervals forp assuming the sample is from a normal population. (a) 90 percent confidence. (Round your answers to 4 decimal places.) The 90% confidence interval is from to (b) 95 percent confidence. (Round your answers to 4 decimal places.) The 95% confidence interval is from to [ (c) 99 percent confidence. (Round your answers to 4 decimal places.) The 99% confidence interval is from 331422 to 38 8578 (d) Describe how the intervals change as you increase the confidence level O The interval gets narrower as the confidence level increases. O The interval gets wider as the confidence level decreases. O The interval gets wider as the confidence level increases O The interval stays the same as the confidencelevel increases. < Prey 4 of 10 Next > a e to search s米 & 7 % 2$ 4 8 9 23 2 W E R G
The highway fuel economy of a 2016 Lexus RX 350 FWD 6-cylinder 3.5-L automatic 5-speed using premium fuel is a normally
distributed random variable with a mean of u = 2050 mpg and a standard deviation of o = 1.25 mpg.
(a) What is the standard error of X the mean from a random sample of 16 fill-ups by one driver? (Round your answer to 4 decimal
places.)
Standard error of X
(b) Within what interval would you expect the sample mean to fall, with 90 percent probability? (Round your answers to 4 decimal
places.)
nt
The interval is from
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Transcribed Image Text:The highway fuel economy of a 2016 Lexus RX 350 FWD 6-cylinder 3.5-L automatic 5-speed using premium fuel is a normally distributed random variable with a mean of u = 2050 mpg and a standard deviation of o = 1.25 mpg. (a) What is the standard error of X the mean from a random sample of 16 fill-ups by one driver? (Round your answer to 4 decimal places.) Standard error of X (b) Within what interval would you expect the sample mean to fall, with 90 percent probability? (Round your answers to 4 decimal places.) nt The interval is from |to ences < Prev 3 of 10 Nexy > e here to search & $ 5 7 8 G H B
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