22 The average age for licensed drivers in the country is u = 42.6 years with a standard deviation of
= 12. The distribution is approximately normal
a. A researcher obtained a sample of n = 25 drivers who received parking tickets. The average age
for these drivers was M = 40.5. Is this a reasonable outcome of a sample of n=25, or is the sample
mean very different from what would normally be expected? (Hint: Compute the z-score for the
sample mean )
b. The same researcher also obtained a sample of n = 12 drivers who received speeding tickets. The
average age for this sample was M = 34.4. Is this a reasonable outcome for a sample of n= 16, or is
the sample mean very different from what would usually be expected? (Again, compute the z-score
for the sample mean.)
Answers: 3
Business, 22.06.2019 17:30
Kevin and jenny, who are both working full-time, have three children all under the age of ten. the two youngest children, who are three and five years old, attended eastside pre-school for a total cost of $3,000. ervin, who is nine, attended big kid daycare after school at a cost of $2,000. jenny has earned income of $15,000 and kevin earns $14,000. what amount of childcare expenses should be used to determine the child and dependent care credit?
Answers: 3
Business, 22.06.2019 19:00
By 2020, automobile market analysts expect that the demand for electric autos will increase as buyers become more familiar with the technology. however, the costs of producing electric autos may increase because of higher costs for inputs (e.g., rare earth elements), or they may decrease as the manufacturers learn better assembly methods (i.e., learning by doing). what is the expected impact of these changes on the equilibrium price and quantity for electric autos?
Answers: 1
Business, 22.06.2019 22:00
What legislation increased the ability for federal authorities to tap telephones and wireless devices, tightened the enforcement of money laundering activities, as well as broadened powers toward acts of terrorism and acts such as drug trafficking?
Answers: 2
22 The average age for licensed drivers in the country is u = 42.6 years with a standard deviation o...
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