Out of 267 roller skates randomly selected for close examination, 5 were found to have a loose
Question:
a. Use the formula for computing an expected count. How many roller skates would you expect to have both problems if the problems are independent?
b. Find the estimated probability of a loose rivet, using the relative frequency.
c. Similarly, find the estimated probability of a cleaning problem.
d. Use the probability formula from Chapter 6 to find the estimated probability of a loose rivet and a cleaning problem, assuming they are independent, using your estimated probabilities from parts b and c.
e. Convert your probability from part d to an expected count by multiplying it by the sample size.
f. Compare your answers to parts a (from the expected count formula) and e (from the independence formula). Comment on why they both came out this way.
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a We would expect 02247 roller skates to have both problems less than one skate Th...View the full answer
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