A Researcher Believes She Has Designed a Keyboard That Is$\alpha$

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The Answer is Let Original keyboard be population 1, New keyboard be population 2, and

Let Original keyboard be population 1, New keyboard be population 2, and be the true average difference in typing speed for the two keyboards. The hypotheses to be tested are Differences: d = (Speed of original keyboard - Speed of new keyboard) are d =3, 1, 2, 2, 4, 0, 5, and 8. The sample mean and sample standard deviation of the differences, d, are calculated as follows: = 25/8 = 3.125. = = 2.532. Hence, the test statistic is = 3.125/0.8952 = 3.491. Reject if t > = 1.895. Since t > 1.895, reject , and conclude that the original keyboard yields slower times.

be the true average difference in typing speed for the two keyboards. The hypotheses to be tested are

Differences: d = (Speed of original keyboard - Speed of new keyboard) are d =3, 1, 2, 2, 4, 0, 5, and 8.
The sample mean and sample standard deviation of the differences, d, are calculated as follows:

= 25/8 = 3.125.

=

= 2.532. Hence, the test statistic is

= 3.125/0.8952 = 3.491. Reject

if t >

= 1.895. Since t > 1.895, reject

, and conclude that the original keyboard yields slower times.

A Researcher Believes She Has Designed a Keyboard That Is $\alpha$

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A Researcher Believes She Has Designed a Keyboard That Is α\alphaα

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A Researcher Believes She Has Designed a Keyboard That Is $\alpha$

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