Questions and Answers of Understandable Statistics Concepts And Methods

Given that z is the standard normal variable (with mean 0 and standard deviation 1), find(a) P(0 ≤ z ≤ 1.75) (b) P(– 1.29 ≤ z ≤ 0)(c) P(1.03 ≤ z ≤ 1.21) (d) P(z ≤
“With Sampling, There Is Too a Free Lunch”—This is a headline that appeared in TheWall Street Journal. The article is about food product samples available at grocery stores. Giving out food
Discuss each of the following topics in class or review the topics on your own. Then write a brief but complete essay in which you summarize the main points. Please include formulas and graphs as
“Sweets May Not Be Culprit in Hyper Kids”—This is a USA Today headliner reporting results of a study that appeared in the New England Journal of Medicine. In this study, the subjects were 25
Break into small groups and discuss the following topics. Organize a brief outline in which you summarize the main points of your group discussion. Scatter diagrams! Are they really useful? Scatter
The Statistical Abstract of the United States reported information about the percentage of arrests of all drunk drivers according to age group. In the following table, the entry 3.7 in the first row
Discuss each of the following topics in class or review the topics on your own. Then write a brief but complete essay in which you summarize the main points. Please include formulas and graphs as
Discuss each of the following topics in class or review the topics on your own. Then write a brief but complete essay in which you summarize the main points. Please include formulas and graphs as
Discuss each of the following topics in class or review the topics on your own. Then write a brief but complete essay in which you summarize the main points. Please include formulas and graphs as
Use a random-number table or random-number generator to simulate tossing a fair coin 10 times. Generate 20 such simulations of 10 coin tosses. Compare the simulations. Are there any strings of 10
Discuss each of the following topics in class or review the topics on your own. Then write a brief but complete essay in which you summarize the main points. Please include formulas and graphs as
Use a random-number table or random-number generator to generate a random sample of 30 distinct values from the set of integers from 1 to 100. Instructions for doing this using the
Make a statistical profile of your own statistics class. Items of interest might be(a) Height, age, gender, pulse, number of siblings, marital status(b) Number of college credit hours completed (as
Census and You, a publication of the Census Bureau, indicates that “Wherever your Web journey ends up, it should start at the Census Bureau’s site.” Visit the Brase/Brase statistics site at
Discuss each of the following topics in class or review the topics on your own. Then write a brief but complete essay in which you summarize the main points. Please include formulas and graphs as
Examine Figure 2-20, “Everyone Agrees: Slobs Make Worst Roommates.” This is a clustered bar graph because two percentages are given for each response category: responses from men and responses
Examine Figure 2-21, “Global Teen Worries.” How many countries were contained in the sample? The graph contains bars and a circle. Which bar is the longest? Which bar represents the greatest
The Story of Old Faithful is a short book written by George Marler and published by the Yellowstone Association. Chapter 7 of this interesting book talks about the effect of the 1959 earthquake on
Discuss each of the following topics in class or review the topics on your own. Then write a brief but complete essay in which you summarize the main points. Please include formulas and graphs as
Look at Figure 4-11, “Who’s Cracking the Books?”(a) Does the figure show the probability distribution of grade records for male students? for female students? Describe all the grade-record
Most academic advisors tell students to major in a field the student really loves. After all, it is true that money cannot buy happiness! Nevertheless, it is interesting to at least look at some of
Discuss each of the following topics in class or review the topics on your own. Then write a brief but complete essay in which you summarize the main points. Please include formulas as appropriate.1.
Consider the information given in Figure 4-12, “Vulnerable Knees.” What is the probability that an orthopedic case selected at random involves knee problems? Of those cases, estimate the
Examine Figure 6-37. Government documents and the Census Bureau show that the age at first marriage for U.S. citizens is approximately normally distributed for both men and women. For men, the
Describe a normal probability distribution.
Discuss each of the following topics in class or review the topics on your own. Then write a brief but complete essay in which you summarize the main points. Please include formulas and graphs as
Examine Figure 6-38, “Time Shopping.”(a) Notice that 52% of the people who go to a shopping center spend less than 1 hour. However, the figure also states that people spend an average of 69
Discuss each of the following topics in class or review the topics on your own. Then write a brief but complete essay in which you summarize the main points. Please include formulas and graphs as
Would you like to travel in space, if given a chance? According to Opinion Research for Space Day Partners, if your answer is yes, you are not alone. Fortyfour percent of adults surveyed agreed that
Powerball! Imagine, you could win a jackpot worth at least $10 million. Some jackpots have been worth more than $250 million! Powerball is a multistate lottery. To play Powerball, you purchase a $1
Can a normal distribution always be used to approximate a binomial distribution? Explain.
Given that z is the standard normal variable (with mean 0 and standard deviation 1), find(a) P(0 ≤ z ≤ 0.75) (b) P(– 1.50 ≤ z ≤ 0)(c) P(–2.67 ≤ z ≤ 1.74) (d) P(z ≥
Find z such that 1% of the area under the standard normal curve lies to the left of z.
Find z such that 95% of the area under the standard normal curve lies between –z and z.
Instead of hearing the jingle of prices being rung up manually on cash registers, we now hear the beep of prices being scanned by electronic scanners. How accurate is price scanning? There are
Break into small groups and discuss the following topics. Organize a brief outline in which you summarize the main points of your group discussion.Iris setosa is a beautiful wildflower that is found
The Flight for Life emergency helicopter service is available for medical emergencies occurring from 15 to 90 miles from the hospital. Emergencies that occur closer to the hospital can be handled
Discuss each of the following topics in class, or review the topics on your own. Then write a brief but complete essay in which you summarize the main points. Please include formulas and graphs as
How easy is it to contact a person in Sacramento, California? If you don’t know the telephone number, it could be difficult. The data from Survey Sampling of Fairfield, Connecticut, reported in
About 11% of Americans believe that Joan of Arc was Noah’s wife. (Source: Harper’s Index, Volume 3.) At a large freshman symposium, a college professor (jokingly) says that Joan of Arc was
Thomas Myers is a staff physician at the clinic in Grand Canyon Village. Based on reports in recent years, Dr. Myers estimates that about 31% of the boating accidents on the Colorado River in Grand
Suppose we have a binomial distribution with n trials and probability of success p. The random variable r is the number of successes in the n trials, and the random variable representing the
Garrison Bay is a small bay in Washington state. A popular recreational activity in the bay is clam digging. For several years, this harvest has been monitored and the size distribution of clams
Discuss each of the following topics in class or review the topics on your own. Then write a brief but complete essay in which you summarize the main points. Please include formulas and graphs as
Examine Figure 8-8, “Fall Back.”(a) Of the 1024 adults surveyed, 66% were reported to favor daylight saving time. How many people in the sample preferred daylight saving time? Using the statistic
Examine Figure 8-9,“Coupons: Limited Use.”(a) Use Figure 8-9 to estimate the percentage of merchandise coupons that were redeemed. Also estimate the percentage dollar value of the coupons that
On a practical nursing licensing exam, the mean score is 79 and the standard deviation is 9 points.(a) What is the standardized score of a student with a raw score of 87?(b) What is the standardized
On an auto mechanic aptitude test, the mean score is 270 points and the standard deviation is 35 points.(a) If a student has a standardized score of 1.9, how many points is that?(b) If a student has