I need a accurate Standard Deviation Thank you Questions Assignment Score: 94.6%

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I need a accurate Standard Deviation Thank you

Questions Assignment Score: 94.6% CollapseResources Give Up? Feedback Question 3 of 19> Attempt 26 1. Question Correct 5 Allernpl:s The Weschler Intelligence Scale for Children (WISC) is an intelligence test designed for children between the ages of 6 and 16. The lest is standardized so thal the mean score for all children is 100 and the standaru deviation is 15. 2. Question Correct 1 Attempt Suppose that the administrators of a very large and competitive school district wish to estimate the mean WISC score for all students enrolled in their programs for gifted and talented children. They obtained a random sample of 40 students currently enrolled in at least one program for gifted and talented children. "l'he test scores for this sample are as follows: 100% 126. 111, 141,96, 123, 115, 116, 113, 127, 114, 122, 116, 104, 126, 126, 132, 139, 111,143, 121 3. Question In Progress 26 Atlempls 75% 119, 107. 154, 125, 120, 135, 142, 132, 94, 103. 143, 115, 132. 107, 118, 105, 10, 135,94,153 Click to download the data in your prefe Crunchlt! SVExcel IMP Mac Text Minitah PC Text R SPSS TI Calc Use this data to calculate the mean WISC score.?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 for ?, the mean score for all students in the school district who are enrolled in gifted and talented programs. Give and the lsof the confidence interval precisetoone decimal place, but give the standard deviation to at least three decimal places in order avoid ounding errors when computing the limits. rred format. 4. Question Correct 22 Attempts 100% 5. Question Correct 2 Attempts 6. Question Correct 2 Altenpts 100% 1214 SD15.264 Assignment Info Upper limit 125.3 Lower limit = 1 1 17.5 Tools

Explanation / Answer

By using MINITAB,

MTB > Describe 'data';
SUBC> Mean;
SUBC> StDeviation;
SUBC> Variance.

Descriptive Statistics: data

Variable Mean StDev Variance
data 121.40 15.46 238.96

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