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As part of the study on ongoing fright symptoms due to exposure to horror movies at...

As part of the study on ongoing fright symptoms due to exposure to horror movies at a young age, the following table was presented to describe the lasting impact these movies have had during bedtime and waking life: Waking symptoms Bedtime symptoms Yes 35 34 No 33 17

(a) What percent of the students have lasting waking-life symptoms? (Round your answer to two decimal places.) %

(b) What percent of the students have both waking-life and bedtime symptoms? (Round your answer to two decimal places.) %

(c) Test whether there is an association between waking-life and bedtime symptoms. State the null and alternative hypotheses. (Use α = 0.01.) Null Hypothesis:

H0: Bedtime symptoms cause waking symptoms.

H0: Waking symptoms cause bedtime symptoms.

H0: There is no relationship between waking and bedtime symptoms.

H0: There is a relationship between waking and bedtime symptoms.

Alternative Hypothesis:

Ha: There is a relationship between waking and bedtime symptoms.

Ha: Waking symptoms cause bedtime symptoms.

Ha: Bedtime symptoms cause waking symptoms.

Ha: There is no relationship between waking and bedtime symptoms.

State the χ2 statistic and the P-value. (Round your answers for χ2 and the P-value to three decimal places.) χ2 = df = P = Conclusion: We do not have enough evidence to conclude that there is a relationship. We have enough evidence to conclude that there is a relationship.

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