IHP 340 Ch 2 Sec 3 HW.docx - *Chapter 2 Section 3 Exercise...

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*Chapter 2, Section 3, Exercise 106 Estimating Summary Statistics Use the dataset given below. 54,55,57,58,58,59,59,61,61,63,66,66,67,67,69,70
Your answer is partially correct. (c) Use StatKey or other technology to find the mean and the standard deviation for this dataset. Click here to access StatKey . Round your answers to one decimal
Chapter 2, Section 3, Exercise 107 Percent Obese by State Computer output giving descriptive statistics for the percent of the population that is obese for each of the 50 US states, from the USStates dataset, is given in the table shown below. Since all 50 US states are included, this is a population, not a sample. Descriptive Statistics: Obese Variable N N* Mean SE Mean StDev Minimum Q1 Median Q3 Maximum Obese 50 0 28.766 0.476 3.369 21.300 26.375 29.400 31.150 35.100 Percent of the population that is obese by state Click here for the dataset associated with this question. Correct. (a) What are the mean and the standard deviation?
σ= 3.369 % Answer *1: exact number, no tolerance Answer *2: exact number, no tolerance Correct. (b) Calculate the z-score for the largest value and interpret it in terms of standard deviations. Do the same for the smallest value. Round your answers to three decimal places. The largest value: z-score= 1.880 The maximum of 35.1% obese is 1.880 standard deviations above the mean. The smallest value: z-score= -2.216 The minimum of 21.3% obese is 2.216 standard deviations below the mean.
(c) This distribution is relatively symmetric and bell-shaped. Give an interval that is likely to contain about 95% of the data values.

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