Praxis Core (Teaching) The Normal Distribution — practice questions
31 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice Praxis Core (Teaching) The Normal Distribution in the app →A normal curve is symmetric about a vertical line drawn through which value?In a normal distribution, where do the mean, the median and the mode sit?The standard normal distribution has which mean and standard deviation?A z-score reports how far a value sits from the mean, measured in which units?A value that is smaller than the mean of its distribution has which kind of z-score?What does a z-score of exactly zero tell you about a value?In a normal distribution, about what percent of values lie within one standard deviation of the mean?The total area under a normal curve always adds up to what number?The graph of a normal distribution has which overall shape?Two normal curves share the same mean, but one has a larger standard deviation. How does that one look?Changing only the mean of a normal distribution does what to its graph?About 99.7 percent of the values of a normal distribution fall within how many standard deviations of the meanWhy can a z-score compare a score from one test with a score from a completely different test?A normal distribution has a mean of 50 and a standard deviation of 6. About 68 percent of its values lie betweA normal distribution has a mean of 50 and a standard deviation of 6. About 95 percent of its values lie betweThe area to the left of a value on a normal curve is 0.0228. What is the area to its right?On a final exam, 39 percent of students scored less than 75. What percent scored higher than 75?A test score sits at the 90th percentile. What does that position mean?A doctor reports that a patient's blood pressure has a z-score of 1.75. Which reading is correct?In a sample of 100 cars the number of faulty cars has a mean of 10 and a standard deviation of 3. About 68 perA coin is flipped 100 times. The number of heads has a mean of 20 and a standard deviation of 4. About 95 percA normal curve fitted to 60 stadium capacities and the actual count of stadiums give slightly different sharesOne student scored 700 on a math test with mean 514 and standard deviation 117. Another scored 30 on a differeIn one group a value of 160.58 has a z-score of -1.5. In a second group a value of 162.85 also has a z-score oAnita's grade average is 0.70 standard deviations above her college's average. Which conclusion does that figuRicardo's grade average is exactly equal to his college's average, so his z-score is zero. What does that zeroMonthly weight change has a mean loss of 5 pounds and a standard deviation of 2 pounds. Someone gains 3 poundsAbout 95 percent of a normal distribution lies within two standard deviations of the mean and about 99.7 perceAbout 68 percent of a normal distribution lies within one standard deviation of the mean and about 95 percent About 99.7 percent of a normal distribution lies within three standard deviations of the mean. About what percFifty customers' waiting times were compared with a fitted normal curve, and the two shares below 6.1 minutes