Question

the answers on there are wrong

6) Your company wants to improve critical thinking skills for their employees. Last year, the employees had a mean critical thinking score of u 15 as measured by the HElghten Critical Thinking Assessment. Suppose the CEO of the company wants to test a program to increase crtical thinking skills. A sample of n-20 employees were selected to attend the program. The HElghten Critical Thinking scores for these n 20 employees after taking the program are provided. How much did the critical thinking scores of the employees increase because Student HElghten Critical Thinking Score of the CEO's program? Compute the following: 20 1 19 2 16.3 1) a point-estimate 18 3 13 4 1.225 16.3 2) a 95% confidence interval 5 13 14 6 1.675 16.3 3) a 99% confidence interval 20 7 16 8 20 18 10 18 11 19 12 16 13 14 14 16 15 15 16 15 17 17 18 13 19 12 20

Answer 1

Solution from the given antormation, we need to estimate mean and standand deviation Sample mean= 16 3 16-3 Point estimate The population standand deviation is unknown, we will disbibution table to estimate the lonlidence 4se the n teval from t table for degrees of breedom n-1, 20 -1, 19 and 95. Confidenæ level, aiti Cal Value t 20.9 (MOE) -tx(standand deviationln Margino! erro 2.09x(2-6178/R0) 1.225 Contidence intenval is given by (mangin o Grro Sample mean + and-MOE 16.3 +/- 1-225 for la degree o breedon and Contidence hevel q9, t is-2-86 (MDE)- 2.86 x(2.78/ Mangin of erior 1675 Contidence intenval is 16-3 +/ 1.675