Write the null and alternative hypotheses for each of the following examples. Determine if each is...

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Statistics

Write the null and alternative hypotheses for each of thefollowing examples. Determine if each is a case of a two-tailed, aleft-tailed, or a right-tailed test. (a) To test if the mean numberof hours spent working per week by college students who hold jobsis different from 20 hours (b) To test whether or not a bankâ€™s ATMis out of service for an average of more than 10 hours per month(c) To test if the mean length of experience of airport securityguards is different from 3 years (d) To test if the mean creditcard debt of college seniors is less than $1000 (e) To test if themean time a customer has to wait on the phone to speak to arepresentative of a mailorder company about unsatisfactory serviceis more than 12 minutes

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a To test if the mean number of hours spent working per week by college students who hold jobs is different from 20 hours Two tailed Below are the null and alternative Hypothesis Null Hypothesis 20 Alternative See Answer

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