Question 1 A researcher tested 23 older adults and 23 younger adults on their ab

Question

Question 1

A researcher tested 23 older adults and 23 younger adults on their ability to remember a list of words. For each participant in each group, the researcher counted the number of words correctly recalled.

HYPOTHESIS

The research hypothesis is that the younger adults will perform better on this task than the older adults.

1. This hypothesis is non-directional/directional?

RESULTS

Suppose the researcher found that the younger adults remembered a mean of 32 words (SD = 1.2) and the older adults remembered a mean of 30 words (SD = 2.7).

Suppose the calculated t is 1.655

APA style: (t(44) = 1.655, p > .05)

CONCLUSION

2. This result is/is not statistically significant

3. We reject/fail to reject the null hypothesis that there is no difference in age/memory performance between the two age/memory performance groups (t(44) = 1.655, p > .05). There is no evidence/clear evidence that the older adults remembered fewer words (M = 30, SD = 2.7) than the younger adults (M = 32, SD = 1.2).

Question 2

A researcher tested 23 older adults and 23 younger adults on their ability to remember a list of words. For each participant in each group, the researcher counted the number of words correctly recalled.

HYPOTHESIS

The research hypothesis is that the younger adults will perform differently on this task than the older adults.

1. This hypothesis is non-directional/directional?

RESULTS

Suppose the researcher found that the younger adults remembered a mean of 36 words (SD = 1.2) and the older adults remembered a mean of 30 words (SD = 2.7).

Suppose the calculated t is 2.613

APA style: (t(44) = 2.613, p < 0.01)

CONCLUSION

2. This result is/is not statistically significant

3. We reject/fail to reject the null hypothesis that there is no difference in age/memory performance between the two age/memory performance groups (t(44) = 2.613, p < 0.01). The older adults remembered fewer/the same number of/more words (M = 30, SD = 2.7) than the younger adults (M = 36, SD = 1.2).

Question 3

A researcher tested 23 older adults and 23 younger adults on their ability to remember a list of words.

Will the researcher potentially be able to determine if age causes increased or decreased memory performance (Yes/No)? Explain your answer in one complete sentence.

Explanation / Answer

Question 1:

1. This is a directional hypothesis because the researcher makes a prediction about the direction of the difference (by saying that younger adults will perform better than older adults).

2. Conclusion:

This result is not statistically significant. We fail to reject the null hypothesis that there is no difference in memory performance between the two age groups (t(44) = 1.655, p > .05). There is no evidence that the older adults remembered fewer words (M = 30, SD = 2.7) than the younger adults (M = 32, SD = 1.2).

Question 2:

1. This is a non-directional hypothesis.

2. Conclusion:

This result is statistically significant. We fail to reject the null hypothesis that there is no difference in memory performance between the two age groups (t(44) = 2.613, p < 0.01). The older adults remembered fewer words (M = 30, SD = 2.7) than the younger adults (M = 36, SD= 1.2).

Please post the other questions separately as we are supposed to answer just one question or four sub parts of a question.

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