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A random sample of size 15 is selected from a normal population but the population standard deviation is unknown. Assume the null hypothesis indicates a two-tailed test and the researcher decides to use the 0.05 significance level. For what values of t will the null hypothesis not be rejected? to the left of -2.145 or to the right of 2.145 O between -2.131 and 2.131 to the left of -2.131 or to the right of 2.131 O between -2.145 and 2.145Suppose you estimate a simple regression where the dependent variable is the number of auto accidents in a day in Georgia. The number of drivers cited for driving while intoxicated (DWI) is the only independent variable. You obtain the following regression equation using MS Excel: ACCIDENTS = 155 + 4.1 * DWI. What is the estimated number of ACCIDENTS for a day where 110 DWI citations were issued? (Round your nal answer to the rst place to the right of the decimal, e.g., 23.4) Your Answer: Answer Which of the following statements best describes the three scatter plots? O B and C show a negative relationship between x and y while A shows a positive relationship between x and y. A shows a negative relationship between x and y, B shows no relationship between x and y while C shows a positive relationship between x and y. A shows a positive relationship between x and y, B shows no relationship between x and y while C 0 shows a negative relationship between x and y. 0 A and B show a positive relationship between x and y while C shows a negative relationship between x and y