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Why are graphs and tables useful when examining data?
A researcher is comparing two middle school 7th grade classes. One class at one school has participated in an arts program (involving putting on a musical play) which emphasized training in group cooperation skills. The class at the other school also put on the same musical play, but did not participate in the cooperation skills training. One month after each group performed the play, they took a paper and pencil social skills test and the scores are shown below. Compare the two groups in terms of measures central tendency, variability, skewness, and kurtosis. What do these measures tell you about the scores in the two groups?
Cooperation Skills Training No Cooperation Skills Training
103 100
10496
105 94
110 85
98 82
97 98
120 101
124 102
114 85
108 88
101 82
96 101
102 98
112 98
108 94
what are characteristics of a population for which it would be appropiate to use mean/median/mode
Median Median is a position average. It is the value of middle item of a variable when the items are arranged according to their values either in ascending or descending order.
What type of correlation coefficient would you use to examine the relationship between the following variables? Explain why you have selected the correlation coefficients. A. Re
Differentiate between data and database
The file Midterm Data.xls has a tab labeled "Income Data 2009". This data is collected income data from a sample of 400 people in 2009. Use a hypothesis test to see whether the av
Analytical Approach We will illustrate this through an example. Example 1 A firm sells a product in a market with a few competitors. The average price charged by the
The PCA is amongst the oldest of the multivariate statistical methods of data reduction. It is a technique for simplifying a dataset, by reducing multidimensional datasets to lower
solve problems
whats mean by Double Exponential Smoothing
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