Quantitative Reasoning Final Exam / Accurate Expert
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Graphs of normal distributions - (ANSWER)always have the same characteristic
bell shape
In a normal distribution, the mean - (ANSWER)is equal to the median
In a normal distribution, data values farther from the mean are - (ANSWER)less
common than data values close to the mean
Consider wages at a fast food restaurant where most of the workers earn the
minimum wage. Would you expect the wages of all workers at this restaurant to
have a normal distribution? - (ANSWER)no, because a normal distribution is
symmetric, but no one earns less than the minimum wage
In a normal distribution, about two-thirds of the data values fall within -
(ANSWER)1 standard deviation of the mean
Suppose a car driven under 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 -
(ANSWER)34 and 46 miles per gallon
Consider again the car described in question 6. On about what percentage of the
trips will the gas mileage be less than 37 miles per gallon? - (ANSWER)16%
, Consider an exam with a 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 - (ANSWER)-1.5
A friend tells you that his IQ is in the 102nd percentile. You can conclude that -
(ANSWER)he doesn't understand percentiles
Researchers are testing a new cancer treatment. To determine whether the
treatment offers a statistically significant improvement in survival rates, the
researchers must - (ANSWER)compare the survival rate with the new treatment
to that with other treatments or no treatment
Working with equal sample sizes, researchers compared three new cold remedies
to a placebo. Which remedy is most likely to be most effective? - (ANSWER)the
one that gave results statistically significant at the 0.01 level
Researchers conduct 20 different experiments to test the effectiveness of a new
weight loss pill compared to the effectiveness of a placebo. For 19 of the 20
experiments, the results are not statistically significant. However, one of the
experiments shows that the pill works better than the placebo with statistical
significance at the 0.05 level. A fair report of the combined results from all 20
experiments would say that - (ANSWER)there is no evidence that the treatment
works
Verified Actual Questions & Answers for Guaranteed
Pass | Newest Update,
Graphs of normal distributions - (ANSWER)always have the same characteristic
bell shape
In a normal distribution, the mean - (ANSWER)is equal to the median
In a normal distribution, data values farther from the mean are - (ANSWER)less
common than data values close to the mean
Consider wages at a fast food restaurant where most of the workers earn the
minimum wage. Would you expect the wages of all workers at this restaurant to
have a normal distribution? - (ANSWER)no, because a normal distribution is
symmetric, but no one earns less than the minimum wage
In a normal distribution, about two-thirds of the data values fall within -
(ANSWER)1 standard deviation of the mean
Suppose a car driven under 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 -
(ANSWER)34 and 46 miles per gallon
Consider again the car described in question 6. On about what percentage of the
trips will the gas mileage be less than 37 miles per gallon? - (ANSWER)16%
, Consider an exam with a 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 - (ANSWER)-1.5
A friend tells you that his IQ is in the 102nd percentile. You can conclude that -
(ANSWER)he doesn't understand percentiles
Researchers are testing a new cancer treatment. To determine whether the
treatment offers a statistically significant improvement in survival rates, the
researchers must - (ANSWER)compare the survival rate with the new treatment
to that with other treatments or no treatment
Working with equal sample sizes, researchers compared three new cold remedies
to a placebo. Which remedy is most likely to be most effective? - (ANSWER)the
one that gave results statistically significant at the 0.01 level
Researchers conduct 20 different experiments to test the effectiveness of a new
weight loss pill compared to the effectiveness of a placebo. For 19 of the 20
experiments, the results are not statistically significant. However, one of the
experiments shows that the pill works better than the placebo with statistical
significance at the 0.05 level. A fair report of the combined results from all 20
experiments would say that - (ANSWER)there is no evidence that the treatment
works
