US High School Using the Normal Distribution — practice questions
8 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice US High School Using the Normal Distribution in the app →Most z-tables give the area under the normal curve on which side of the z-score?To read a probability out of a z-table by hand, what do you work out before opening the table?Exam scores are normal with mean 63 and standard deviation 5. The 90th percentile has a z-score of about 1.28.The area to the left of one z-score is 0.9332 and to the left of another is 0.3446. What area lies between theForty percent of the values in a normal distribution are at least k. Which area do you look up to find k?Which percentile marks the top of the bottom quartile of a normal distribution?To pick out the middle 20 percent of a normal distribution, which two percentiles do you need?A normal distribution has a third quartile of 46.3 and a first quartile of 27.5. What is the interquartile ran