A sample selected from a population gave a sample proportion equal to 0.74 Round your answers to three decimal places. a. Make a 99% confidence interval for p assuming n = 75 . = ( ) , ( )  b. Construct a 99% confidence interval for passuming n = 575 . = ( ) , ( ) Make a 99% confidence interval for p assuming n = 1400 = ( ) , ( )

The following information is obtained for a sample of 80 observations taken from a population. SS xx 370.842, se = 0.922, and y = 164.43 - 2.83x Make a 97 % confidence interval for B. = Round your answers to two decimal places. The 97 % confidence interval for Bis ( i ).

Tina catches a 14-pound bass.  She does not know the population mean or standard deviation.  So she takes a sample of five friends and they say the last bass they caught was 9, 12, 13, 10, and 10 pounds.  Find the t and calculate a 95% (α = .05) confidence interval.

A statistics class is estimating the mean height of all female students at their college. They collect a random sample of 42 female students and measure their heights. The mean of the sample is 65.3 inches and the sample standard deviation is 5.4 inches. Find the 90% confidence interval for the mean height of all female students in their school? Assume that the distribution of individual female heights at this school is approximately normal. 1. The t value is 1.3025 2. The standard error has a value of -- 3. The margin of error has a value of 4. Find the 90% confidence interval for the mean height of all female students in their school

Use the sample Information E = 37, o = 5, n=15 to calculate the following confidence Intervals for u assuming the sample Is from a normal populatlon. (a) 90 percent confidence. (Round your answers to 4 declmal 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.) hs The 99% confidence interval is from to ( Prev 4 of 10 Next >

(1 point) A random sample of 70 observations produced a mean of a 39.5 from a population with a normal distribution and a standard deviation o = 2.14. (a) Find a 95% confidence interval for u (b) Find a 99% confidence interval for (c) Find a 90% confidence interval for

(1 point) A random sample of 110 observations produced a mean of x = 34.7 from a population with a normal distribution and a standard deviation o = 4.39. (a) Find a 99% confidence interval for u (b) Find a 95% confidence interval for (c) Find a 90% confidence interval for u

Use the sample information x¯x¯  = 38, σ = 4, n = 11 to calculate the following confidence intervals for μ 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           ?      to       ?  (d) Describe how the intervals change as you increase the confidence level.   multiple choice The interval gets narrower as the confidence level increases. The interval gets wider as the confidence level decreases. The interval gets wider as the confidence level increases. The interval stays the same as the confidence level increases.

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