Solutions for Excursions In Modern Mathematics, 9th Edition
Problem 1E:
Consider the normal distribution represented by the normal curve in Fig 17-12. Assume that P is a...Problem 2E:
Consider the normal distribution represented by the normal curve in Fig. 17-13. Assume that P is a...Problem 3E:
Consider the normal distribution represented by the normal curve in Fig. 17-14. Assume that P and P...Problem 4E:
Consider the normal distribution represented by the curve in Fig. 17-15. Assume that P and P are the...Problem 5E:
Consider a normal distribution with mean =81.2lb and standard deviation =12.4lb. a. Find the third...Problem 6E:
Consider a normal distribution with mean =2354 points and standard deviation =468 points. a. Find...Problem 7E:
Consider a normal distribution with first quartile Q1=432.5 points and third quartile Q3=567.5...Problem 8E:
Consider a normal distribution with first quartile Q1=229 and third quartile Q3=391. a. Find the...Problem 9E:
Estimate the value of the standard deviation rounded to the nearest tenth of an inch of a normal...Problem 10E:
Estimate the value of the standard deviation rounded to the nearest dollar of a normal distribution...Problem 11E:
Explain why a distribution with median M=82, mean =71 and standard deviation =11 cannot be a normal...Problem 12E:
Explain why a distribution with median M=453, mean =453, first quartile Q1=343 and third quartile...Problem 13E:
Explain why a distribution with =195, Q1=180 and Q3=220 cannot be a normal distribution.Problem 15E:
A normal distribution has mean =30kg and standard deviation =15kg. Find the z- value of each of the...Problem 20E:
In a normal distribution with mean =83.2 and standard deviation =4.6, find the data value...Problem 26E:
In a normal distribution with standard deviation =20, the data value x=10 has a z-value of z=2. Find...Problem 29E:
Consider the normal distribution represented by the normal curve in Fig. 17-16. Find the mean and...Problem 30E:
Consider the normal distribution represented by the normal curve in Fig 17-17. Find the mean and...Problem 31E:
Consider the normal distribution defined by Fig. 17-18. a. Find the mean and the standard deviation...Problem 32E:
Consider the normal distribution defined by Fig. 17-19. a. Find the mean and the standard deviation...Problem 33E:
A normal distribution has mean =71.5in., and the 16th percentile of the distribution is P16=65.2in....Problem 34E:
A normal distribution has standard deviation =12.3 points and the 84th percentile of the...Problem 38E:
A normal distribution has mean =500 and standard deviation =35. Approximately what percent of the...Problem 39E:
In a normal distribution, what percent of the data have z-values satisfying a. z2? b. 1z2?Problem 40E:
In a normal distribution, what percent of the data have z-values satisfying a. z3 b. 3z2Problem 41E:
Exercises 41 through 44 refer to the following: 2500 students take a college entrance exam. The...Problem 42E:
Exercises 41 through 44 refer to the following: 2500 students take a college entrance exam. The...Problem 43E:
Exercises 41 through 44 refer to the following: 2500 students take a college entrance exam. The...Problem 44E:
Exercises 41 through 44 refer to the following: 2500 students take a college entrance exam. The...Problem 45E:
Exercises 45 through 48 refer to the following: As part of a research project, the blood pressures...Problem 46E:
Exercises 45 through 48 refer to the following: As part of a research project, the blood pressures...Problem 47E:
Exercises 45 through 48 refer to the following: As part of a research project, the blood pressures...Problem 48E:
Exercises 45 through 48 refer to the following: As part of a research project, the blood pressures...Problem 49E:
Exercises 49 through 52 refer to the following: Packaged foods sold at supermarkets are not always...Problem 50E:
Exercises 49 through 52 refer to the following: Packaged foods sold at supermarkets are not always...Problem 51E:
Exercises 49 through 52 refer to the following: Packaged foods sold at supermarkets are not always...Problem 52E:
Exercises 49 through 52 refer to the following: Packaged foods sold at supermarkets are not always...Problem 53E:
Exercises 53 through 56 refer to the distribution of weights for infants by age and gender. In all...Problem 54E:
Exercises 53 through 56 refer to the distribution of weights for infants by age and gender. In all...Problem 55E:
Exercises 53 through 56 refer to the distribution of weights for infants by age and gender. In all...Problem 56E:
Exercises 53 through 56 refer to the distribution of weights for infants by age and gender. In all...Problem 57E:
An honest coin is tossed n=3600 times. Let the random variable Y denote the number of tails tossed....Problem 59E:
Suppose that a random sample of n=7056 adults is to be chosen for a survey. Assume that the gender...Problem 60E:
An honest die is rolled. If the roll comes out even (2,4,or6) you will win 1; if the roll comes out...Problem 61E:
A dishonest coin with probability of heads p=0.4 is tossed n=600 times. Let the random variable X...Problem 62E:
A dishonest coin with probability of heads p=0.75 is tossed n=1200 times. Let the random variable X...Problem 64E:
Suppose that 1 out of every 10 plasma televisions shipped has a defective speaker. Out of a shipment...Problem 67E:
Percentiles. The pth percentile of a sorted data set is a number xp such that p of the data fall at...Problem 70E:
Percentiles. The pth percentile of a sorted data set is a number xp such that p of the data fall at...Problem 72E:
Percentiles. The pth percentile of a sorted data set is a number xp such that p of the data fall at...Problem 77E:
A dishonest coin with probability of heads p=0.1 is tossed n times. Let the random variable X denote...Browse All Chapters of This Textbook
Chapter 1 - The Mathematics Of Elections The Paradoxes Of DemocracyChapter 2 - The Mathematics Of Power Weighted VotingChapter 3 - The Mathematics Of Sharing Fair-division GamesChapter 4 - The Mathematics Of Apportionment Making The RoundsChapter 5 - The Mathematics Of Getting Around Euler Paths And CircuitsChapter 6 - The Mathematics Of Touring Traveling Salesman ProblemsChapter 7 - The Mathematics Of Networks The Cost Of Being ConnectedChapter 8 - The Mathematics Of Scheduling Chasing The Critical PathChapter 9 - Population Growth Models There Is Strength In NumbersChapter 10 - Financial Mathematics Money Matters
Chapter 11 - The Mathematics Of Symmetry Beyond ReflectionChapter 12 - Fractal Geometry The Kinky Nature Of NatureChapter 13 - Fibonacci Numbers And The Golden Ratio Tales Of Rabbits And GnomonsChapter 14 - Censuses, Surveys, Polls, And Studies The Joys Of Collecting DataChapter 15 - Graphs, Charts And Numbers The Data Show And TellChapter 16 - Probabilities, Odds, And Expectations Measuring Uncertainty And RiskChapter 17 - The Mathematics Of Normality The Call Of The Bell
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