ex1_f13a - STA 6166 Exam 1 Fall 2013 PRINT Name Conduct all tests at = 0.05 significance level Q.1 The father of a teenage child records the number of

# ex1_f13a - STA 6166 Exam 1 Fall 2013 PRINT Name Conduct all...

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STA 6166 – Exam 1 – Fall 2013 PRINT Name ___________________________ Conduct all tests at = 0.05 significance levelQ.1. The father of a teenage child records the number of telephone calls the child receives or makes for each of five days. The results are: 9,6,12,7,6 a.What is the mean number of calls in one day?b.What is the median number of calls in one day?c.What is the standard deviation of the number of calls?Q.2. A school system employs teachers at salaries between \$18,000 and \$40,000. The teachers' union and the school board are negotiating the form of next year's increase. Circle the correct response to each of the following.p.2.a. If every teacher is given a flat \$1,000 raise, what is the effect on each of the following measures of salaries?Mean: (1) decreases by \$1,000 (2) increases by \$1,000 (3) remains the sameStandard Deviation: (1) decreases by \$1,000 (2) increases by \$1,000 (3) remains the samep.2.b. If every teacher is given a 5% raise, the amount of the raise will vary from \$900 to \$2,000, depending on the teacher's current salary. What is the effect on each of the following descriptive measures of the salaries?