Elements of inferential statistical analysis

Reference no: EM1316963

Q1) Life span of certain type of car timing belt, computed in miles, is normally distributed, with mean of 80,000 miles and standard deviation of 5000 miles. If maker of timing belt wishes less than 4% of belts to fail whereas under warranty, for how many miles must the timing belts be guaranteed?

a) Less than 66,750 miles

b) Less than 88,250 miles

c) Less than 71,250 miles

d) Less than 93,250 miles

Q2) Parking at large university has become very big problem. University administrators are interested in finding average parking time of its students. Administrator inconspicuously followed 250 students and carefully recorded their parking times. Recognize population of interest to university administration.

a) 250 students that data was collected from.

b) Entire set of students that park at the university.

c) Entire set of faculty, staff, and students that park at the university.

d) Students that park at the university between 9 and 10AM on Wednesdays.

e) None of the others

Q3) Name three elements of the inferential statistical analysis.

Q4) Categorize the given examples of data as either qualitative or quantitative.

a) The bacteria count in water at each of the 20 city swimming pools

b) Occupation of each of 100 shoppers at supermarket

c) Marital status of each person living on city block

Reference no: EM1316963

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