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A random sample of 45 female professional soccer players found an average height of 67.4 inches. It is known that the standard deviation in heights for female soccer players is 2 inches. Build a 94% CI for the mean height of female professional soccer players. This will be a Z-Interval since o is known. a. σ = To find the Margin of Error, E, we need to find the Critical Value, Ze. To do this we use invNorm(C+ (1-C)/2), where in this problem C= 0.94. Round to three decimals. b. Ze = Next we find the Margin of Error: E = Ze c. E= = d. Finally, we compute our Cl: - E<μ< + E √n < F< Round to one decimal.
To build a 98% CI for the mean of a population for which a is 18, you take a random sample of 34 values and find that the sample mean is 212.6. Round all intermediate calculations to two decimals, then construct the Cl and enter like this: (min,max). Be sure to include the parentheses or you will be marked wrong. Note: if you use a built-in CI command on a calculator/computer, you might get marked wrong due to rounding. Use the formulas given in the text/notes. Submit Question
To build a 95% CI for the mean of a population for which o is 17, you take a random sample of 33 values and find that the sample mean is 297.6. Round all intermediate calculations to two decimals, then construct the Cl and enter like this: (min,max). Be sure to include the parentheses or you will be marked wrong. Note: if you use a built-in Cl command on a calculator/computer, you might get marked wrong due to rounding. Use the formulas given in the text/notes. Submit Question