Quantitative Reasoning Final Exam – Questions
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Terms in this set (61)
Graphs of normal always have the same characteristic bell shape
distributions
In a normal distribution, the is equal to the median
mean
In a normal distribution, less common than data values close to the mean
data values farther from the
mean are
Consider wages at a fast no, because a normal distribution is symmetric, but no
food restaurant where most one earns less than the minimum wage
of the workers earn the
minimum wage. Would you
expect the wages of all
workers at this restaurant to
have a normal distribution?
In a normal distribution, 1 standard deviation of the mean
about two-thirds of the
data values fall within
Suppose a car driven under 34 and 46 miles per gallon
different conditions gets a
mean gas mileage of 40
miles per gallon with a
standard deviation of 3
miles per gallon. If you
drive this car many times,
the gas mileage on 95% of
the trips will be between
, Consider again the car 16%
described in question 6. On
about what percentage of
the trips will the gas
mileage be less than 37
miles per gallon?
Consider an exam with a -1.5
normal distribution of
scores with a mean of 75
and a standard deviation of
6. If you get a 66 on the
exam, your standard score
(z-score) is
A friend tells you that his IQ he doesn't understand percentiles
is in the 102nd percentile.
You can conclude that
Researchers are testing a compare the survival rate with the new treatment to that
new cancer treatment. To with other treatments or no treatment
determine whether the
treatment offers a
statistically significant
improvement in survival
rates, the researchers must
Working with equal sample the one that gave results statistically significant at the
sizes, researchers 0.01 level
compared three new cold
remedies to a placebo.
Which remedy is most likely
to be most effective?
With Comprehensive Solutions
Save
Terms in this set (61)
Graphs of normal always have the same characteristic bell shape
distributions
In a normal distribution, the is equal to the median
mean
In a normal distribution, less common than data values close to the mean
data values farther from the
mean are
Consider wages at a fast no, because a normal distribution is symmetric, but no
food restaurant where most one earns less than the minimum wage
of the workers earn the
minimum wage. Would you
expect the wages of all
workers at this restaurant to
have a normal distribution?
In a normal distribution, 1 standard deviation of the mean
about two-thirds of the
data values fall within
Suppose a car driven under 34 and 46 miles per gallon
different conditions gets a
mean gas mileage of 40
miles per gallon with a
standard deviation of 3
miles per gallon. If you
drive this car many times,
the gas mileage on 95% of
the trips will be between
, Consider again the car 16%
described in question 6. On
about what percentage of
the trips will the gas
mileage be less than 37
miles per gallon?
Consider an exam with a -1.5
normal distribution of
scores with a mean of 75
and a standard deviation of
6. If you get a 66 on the
exam, your standard score
(z-score) is
A friend tells you that his IQ he doesn't understand percentiles
is in the 102nd percentile.
You can conclude that
Researchers are testing a compare the survival rate with the new treatment to that
new cancer treatment. To with other treatments or no treatment
determine whether the
treatment offers a
statistically significant
improvement in survival
rates, the researchers must
Working with equal sample the one that gave results statistically significant at the
sizes, researchers 0.01 level
compared three new cold
remedies to a placebo.
Which remedy is most likely
to be most effective?
