1. Determine the interquartile range of the following: 70, 71, 79, 80, 81, 82, 84, 92, 94 rounded to 1 decimal place.
2. Given the data 18, 23, 26, 29, find the standard deviation to two decimal places rounded to 2 decimal place.
3. Given a normally distributed data set whose mean is 29 and whose standard deviation is 6.3, what value of x would have a z-score of 1.27?
4. IQ scores of people around the world are normally distributed, with a mean of 100 and a standard deviation of 15. A genius is someone with an IQ greater than or equal to 130. What percent of the population is considered genius? a percent rounded to 2 decimal places.
5. Suppose that masses of newborns are normally distributed with a mean of 8.2 lbs. and a standard deviation of 1.4 lbs.. A newborn is potentially at risk if the baby's mass falls in the lowest 2.5%. These babies will have a mass of less than how many pounds? rounded to 1 decimal place.
6. Each letter of the word LOVEMATHS is placed in hat. If one letter is drawn randomly, what is the probability that a vowel is not selected? a reduced fraction in the format numerator/denominator
7. Determine the probability of drawing 3 black cards in a row (with replacement) from a standard deck. rounded to 3 decimal places.
8. The probability of events A and B is 0.47, and the probability of event A is 0.9. Find the probability of event B given event A. rounded to 3 decimal places.
9. An aquarium at a pet store contains guppies (16 females and 8 males) and tetras (14 females and 22 males). If the clerk randomly nets a fish, what is the probability that it is a female or a tetra? rounded to 3 decimal places.
10. From a classroom of 18 students, the number of students taking Data Management is 13, the number taking Calculus is 9. There are 5 students who are not taking either course. How many students are taking both Calculus and Data Management?
11. From a classroom of 24 students, the number of students taking Data Management is 13, the number taking Calculus is 9. There are 5 students who are not taking either course. How many students are taking just Data Management?