121.4 SD =| 2.372 Lower limit = Upper limit =

MATLAB: An Introduction with Applications
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The mean and standard deviation filled in are correct. I cannot seem to get the limits correct. ?

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Use this data to calculate the mean WISC score, x, for these 40 students. Next, compute the standard deviation, SD, of the
sampling distribution of the sample mean, assuming that the standard deviation of WISC scores for students in the district
is the same as for the population as a whole. Finally, determine both the lower and upper limits of a 90% z-confidence
interval foru, the mean score for all students in the school district who are enrolled in gifted and talented programs.
Give x and the limits of the confidence interval precise to one decimal place, but give the standard deviation to at least
three decimal places in order avoid rounding errors when computing the limits.
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Transcribed Image Text:Click to download the data in your preferred format. CrunchIt! CSV Excel JMP Mac Text Minitab PC Text R SPSS TI Calc Use this data to calculate the mean WISC score, x, for these 40 students. Next, compute the standard deviation, SD, of the sampling distribution of the sample mean, assuming that the standard deviation of WISC scores for students in the district is the same as for the population as a whole. Finally, determine both the lower and upper limits of a 90% z-confidence interval foru, the mean score for all students in the school district who are enrolled in gifted and talented programs. Give x and the limits of the confidence interval precise to one decimal place, but give the standard deviation to at least three decimal places in order avoid rounding errors when computing the limits. kerms'of use contact us help 5:13 PM తెంంలో క) 11/12/2020 * メ op delete prt sc insert f11 f1o l f9 18 + 144 f6
ree decimal places in order avoid rounding errors when computing the limits.
x =
121.4
SD = | 2.372
Lower limit =
Upper limit =
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Transcribed Image Text:ree decimal places in order avoid rounding errors when computing the limits. x = 121.4 SD = | 2.372 Lower limit = Upper limit = about us careers privacy policy terms of use contact us help 5:13 PM 昂 11/12/2020 Cop prt sc insert AA
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