A researcher hypothesizes that strong negative correlation between the number of

Question

A researcher hypothesizes that strong negative correlation between the number of alcoholic drinks consumed the night before a major test and the score on that test. The two variables (amount of alcohol and test score) are listed below. Enter the data into Excel, determine the correlation, and explain whether or not the researcher's hypothesis is correct. 1. The correlation coefficient of number of drinks and test score is _____. 2. Explain what this correlation coefficient means (i.e., provide the strength and direction). 3. What can you conclude about the relationship between the number of drinks and test score? (Describe in everyday language the relationship between the variables.) 4. Was the researcher's hypothesis correct or incorrect? Consider the correctness of both strength and direction in the researcher's predictions.

Explanation / Answer

Answer:

1).

No. of drinks

Test scores

No. of drinks

1

Test scores

-0.60173

1

Correlation coefficient r = -0.60173

2).

The correlation is negative and moderate.

3).

When the number of drinks increases the test scores decreases.

4).

The researcher hypothesis that negative correlation is correct but the strength is not strong but moderate.

No. of drinks

Test scores

No. of drinks

1

Test scores

-0.60173

1

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