There is a new input technique for touch-screen devices that allows users to inp

Question

There is a new input technique for touch-screen devices that allows users to input a word by sliding a finger from letter to letter. The user's finger is only removed from the keyboard between words. The developers claim that typing speed using this new input technique is faster when compared with traditional touch-screen keyboards. The accompanying data table shows the typing speeds of 10 individuals who were measured typing using both methods.

Person: 1 2 3 4 5 6 7 8 9 10

New Method 47 52 41 37 53 41 38 31 54 45

Traditional 41 46 36 27 44 41 43 38 45 37

Perform a hypothesis test using alpha = 0.05 to determine if the average typing speed using these two input methods is different. Let 1 be the population mean for the new method and let 2 be the population mean for the traditional method, where d=12. Choose the correct hypotheses below. Question 1 options:

A) H0: d 4.1 H1: d = 4.1

B) H0: d 0 H1: d = 0

C) H0: d = 0 H1: d 0

D) H0: d = 4.1 H1: d 4.1

E) H0: d 0 H1: d > 0

Explanation / Answer

we have to determine if the average typing speed using these two input methods is different

hence

C) H0: d = 0 H1: d 0 is correct

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