I already have answers I just want to see the work of how it is done! Use the in

Question

I already have answers I just want to see the work of how it is done!

Use the information given below to answer the next two questions. A study is designed to determine the effect of an office-training course on typing productivity. Ten typists who have not taken the course are randomly selected. The investigator assigns 15 pages of equally difficult text to be typed by the each typist both before and after completing the training course. The raw data on errors in typing and the MS Excel analysis are shown in the tables below. Typist Before After t-Test: Paired Two Sample for Means 29 25 19 17 Before After 34 30 28.300 Mean 29.400 42 37 35.822 29.567 Variance 28 29 Observations 10 10 33 31 Pearson Correlation 0.819 28 Hypothesized Mean Difference 0.000 27 26 9.000 27 30 t Stat 1.000 10 27 33 0.172 POTK-t) one-tail t Critical one-tail TK-t two-ta 0.343 t Critical two-tail

Explanation / Answer

all answers are fine

1) t critical (one-tail) = 1.833

2) t critical (two tail) = 2.2621

9) (c)

at 0.05 level t critical = 1.833

10) (b)

mean difference = 29.4-28.3 = 1.1

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