The following are ages in years of nine employees of a large company. 46, 22, 35, 26, 22, 53, 33, 42, 59 Find the mean and the standard deviation on this data set.

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National park services, a bureau of the US government responsible for park management, is interested in how the scores of their park rangers today are better or worse than in the past. The cognitive test that the forest rangers take as remained the same over the last five years. Below are the scores for each year, compute the mean, median, mode, range, and standard deviation for each year. ​       ​Current Year 56, 45, 64, 75, 87, 81, 69, 81, 58, 92, 99, 95, 75, 92, 73, 83, 47, 69, 57, 74, 62, 74, 73, 100, 83   Five Years Ago 66, 78, 75, 79, 59, 74, 55, 89, 55, 79, 68, 27, 69, 95, 68, 90, 65, 79, 69, 79, 87, 86, 98, 81, 96

The highway mileage (mpg) for a sample of 8 different models of a car company can be found below. Find the mean, median, mode, and standard deviation. Round to one decimal place as needed. 20, 23, 25, 28, 30, 32, 35, 35 Mean = Median = %3D Mode = Standard Deviation =

A psychologist has designed an index to measure the social perspectives of elementary school children.  The index is based on ratings of a child’s responses to questions about a set of photographs showing different social situations.  The following are the indices measured on a random sample of 16 children attending elementary school in a particular district. 48, 75, 69, 58, 60, 68, 59, 66, 71, 52, 49, 60, 54, 55, 70, 57   For the data the mean index is 60.69 and the standard deviation is 8.26. Perform a statistical test to determine if the population mean index is greater than 50. a) Name of hypothesis test:   b) H0:   c) HA:   d) Test Statistic:   e) Rejection region:   f) Decision in the context of the problem:

What is the sum of the deviation scores for the following list of numbers? 1,1,2,3,3,3,3,4,4,5,6,7,7,7,8,8,9,9,9,10

The question is, for the following scores find the mean, median, sum of squared deviations, variance, and standard deviation. 2,2,0,5,1,4,1,3,0,,0,1,4,,4,0,1,,4,3,4,2,1,0. Tnank you!

A psychologist has designed an index to measure the social perspectives of elementary school children. The index is based on ratings of a child’s responses to questions about a set of photographs showing different social situations.  The following are the indices measured on a random sample of 16 children attending elementary school in a particular district.   48, 75, 69, 58, 60, 68, 59, 66, 71, 52, 49, 60, 54, 55, 70, 57   For the data the mean index is 60.69 and the standard deviation is 8.26. The confidence interval is 95%, with a level of significance of 0.05. Perform a statistical test to determine if the population mean index is greater than 50. a) Name of hypothesis test:   b) H0:   c) HA:   d) Test Statistic:   e) Rejection region:   f) Decision in the context of the problem:

In a sample of employees at a company here were the number of days they were out (sick/personal/vacation days) last year:​​​​​​​​   1,  6,  19,  35,  5,  9,  8,  12,  2,  15,  7,  7,  11,  15,  0,  25,  20,  15,  19,  5   Using Minitab, find the following sample statistics (take a screenshot of your output from Minitab and paste it here):   Mean = ​​                                           median =​​   Standard deviation =​​​​IQR=

It is known that, on average, the level of knowledge in natural sciences of children in urban areas is 7.5. It is suspected that the average natural science knowledge of children in rural areas is lower. identify The research hypothesis H1 The null hypothesis HO The rejection region of the null hypothesis 1. Hi: д > 7.5 2. Но: а 7.5 3. [tin-1), 0) 1. Η: μ > 7.5 2. Ho: д 7.5 3. (-00, -tn-1)]