Percentage of observations of normal distribution

Reference no: EM1396062

1) The linear regression model has a slope or -2.5 and an intercept of 10. The sample coefficient of determination is 0.50. What is the value of the sample correlation coefficient?

2) What percentage of observations of a normal distribution are represented by the mean plus or minus 1.96 standard deviations?

Reference no: EM1396062

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