Stats
5th Edition
ISBN: 9780135163825
Author: De Veaux, Richard D., Velleman, Paul F., BOCK, David E.
Publisher: Pearson,
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Chapter 15, Problem 20E
a.
To determine
Find the
b.
To determine
Find the probability that the bad one is obtained within the first 10 examined.
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65% of all violent felons in the prison system are repeat offenders. If 43 violent felons are randomly selected, find the probability that
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b. At most 28 of them are repeat offenders. c. At least 28 of them are repeat offenders. d. Between 22 and 26 (including 22 and 26) of them are repeat offenders.
08:34
◄ Classroom
07:59
Probs. 5-32/33
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ا.
89
5-34. Determine the horizontal and vertical components
of reaction at the pin A and the normal force at the smooth
peg B on the member.
A
0,4 m
0.4 m
Prob. 5-34
F=600 N
fr
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ar
0.
163586
5-37. The wooden plank resting between the buildings
deflects slightly when it supports the 50-kg boy. This
deflection causes a triangular distribution of load at its ends.
having maximum intensities of w, and wg. Determine w
and wg. each measured in N/m. when the boy is standing
3 m from one end as shown. Neglect the mass of the plank.
0.45 m
3 m
Examine the Variables: Carefully review and note the names of all variables in the dataset. Examples of these variables include:
Mileage (mpg)
Number of Cylinders (cyl)
Displacement (disp)
Horsepower (hp)
Research: Google to understand these variables.
Statistical Analysis: Select mpg variable, and perform the following statistical tests. Once you are done with these tests using mpg variable, repeat the same with hp
Mean
Median
First Quartile (Q1)
Second Quartile (Q2)
Third Quartile (Q3)
Fourth Quartile (Q4)
10th Percentile
70th Percentile
Skewness
Kurtosis
Document Your Results:
In RStudio: Before running each statistical test, provide a heading in the format shown at the bottom. “# Mean of mileage – Your name’s command”
In Microsoft Word: Once you've completed all tests, take a screenshot of your results in RStudio and paste it into a Microsoft Word document. Make sure that snapshots are very clear. You will need multiple snapshots. Also transfer these results to the…
Chapter 15 Solutions
Stats
Ch. 15.6 - As we noted a few chapters ago, the Pew Research...Ch. 15.6 - As we noted a few chapters ago, the Pew Research...Ch. 15.6 - Prob. 3JCCh. 15.6 - Prob. 4JCCh. 15 - Prob. 1ECh. 15 - Bernoulli 2 Do these situations involve Bernoulli...Ch. 15 - 7. Toasters A manufacturer ships toasters in...Ch. 15 - 8. Soccer A soccer learn estimates that they will...Ch. 15 - 9. Toasters again In a batch of 10,000 toasters,...Ch. 15 - 10. Soccer again If this team has 200 corner kicks...
Ch. 15 - 11. Sell! A car dealership sells an average of 5...Ch. 15 - 12. Passing on A large hospital has an average of...Ch. 15 - Telephone numbers A cable provider wants to...Ch. 15 - Serial numbers In an effort to check the quality...Ch. 15 - Component lifetimes Lifetimes of electronic...Ch. 15 - Website sales Suppose occurrences of sales on a...Ch. 15 - On time A Department of Transportation report...Ch. 15 - Lost luggage A Department of Transportation report...Ch. 15 - Hoops A basketball player has made 80% of his foul...Ch. 15 - Chips Suppose a computer chip manufacturer rejects...Ch. 15 - More hoops For the basketball player in Exercise...Ch. 15 - Chips ahoy For the computer chips described in...Ch. 15 - Customer center operator Raaj works at the...Ch. 15 - Cold calls Justine works for an organization...Ch. 15 - Blood Only 4% of people have Type AB blood.
On...Ch. 15 - Color blindness About 8% of males are color-blind....Ch. 15 - Coins and intuition If you flip a fair coin 100...Ch. 15 - Roulette and intuition An American roulette wheel...Ch. 15 - Lefties Assume that 13% of people are left-handed....Ch. 15 - Arrows An Olympic archer is able to hit the...Ch. 15 - Lefties, redux Consider our group of 5 people from...Ch. 15 - More arrows Consider our archer from Exercise...Ch. 15 - Prob. 33ECh. 15 - Still more arrows Suppose the archer from Exercise...Ch. 15 - Prob. 35ECh. 15 - International students At a certain college, 6% of...Ch. 15 - Prob. 37ECh. 15 - Frogs A wildlife biologist examines frogs for a...Ch. 15 - And more tennis Suppose the tennis player in...Ch. 15 - Prob. 40ECh. 15 - Apples An orchard owner knows that he’ll have to...Ch. 15 - Frogs, part II Based on concerns raised by his...Ch. 15 - Lefties, again A lecture hall has 200 seats with...Ch. 15 - No-shows An airline, believing that 5% of...Ch. 15 - Prob. 45ECh. 15 - Prob. 46ECh. 15 - Prob. 47ECh. 15 - Bank tellers I am the only bank teller on duty at...Ch. 15 - TB Worldwide, tuberculosis is the number-one cause...Ch. 15 - Earthquakes Suppose the probability of a major...Ch. 15 - Prob. 51ECh. 15 - Prob. 52ECh. 15 - Prob. 53ECh. 15 - True-false A true–false test consists of 50...Ch. 15 - Prob. 55ECh. 15 - Prob. 56ECh. 15 - Prob. 57ECh. 15 - Prob. 58ECh. 15 - Prob. 59ECh. 15 - Quality control In an effort to improve the...Ch. 15 - Prob. 61ECh. 15 - Quality control, part 2 The cell phone...
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- Examine the Variables: Carefully review and note the names of all variables in the dataset. Examples of these variables include: Mileage (mpg) Number of Cylinders (cyl) Displacement (disp) Horsepower (hp) Research: Google to understand these variables. Statistical Analysis: Select mpg variable, and perform the following statistical tests. Once you are done with these tests using mpg variable, repeat the same with hp Mean Median First Quartile (Q1) Second Quartile (Q2) Third Quartile (Q3) Fourth Quartile (Q4) 10th Percentile 70th Percentile Skewness Kurtosis Document Your Results: In RStudio: Before running each statistical test, provide a heading in the format shown at the bottom. “# Mean of mileage – Your name’s command” In Microsoft Word: Once you've completed all tests, take a screenshot of your results in RStudio and paste it into a Microsoft Word document. Make sure that snapshots are very clear. You will need multiple snapshots. Also transfer these results to the…arrow_forwardExamine the Variables: Carefully review and note the names of all variables in the dataset. Examples of these variables include: Mileage (mpg) Number of Cylinders (cyl) Displacement (disp) Horsepower (hp) Research: Google to understand these variables. Statistical Analysis: Select mpg variable, and perform the following statistical tests. Once you are done with these tests using mpg variable, repeat the same with hp Mean Median First Quartile (Q1) Second Quartile (Q2) Third Quartile (Q3) Fourth Quartile (Q4) 10th Percentile 70th Percentile Skewness Kurtosis Document Your Results: In RStudio: Before running each statistical test, provide a heading in the format shown at the bottom. “# Mean of mileage – Your name’s command” In Microsoft Word: Once you've completed all tests, take a screenshot of your results in RStudio and paste it into a Microsoft Word document. Make sure that snapshots are very clear. You will need multiple snapshots. Also transfer these results to the…arrow_forward2 (VaR and ES) Suppose X1 are independent. Prove that ~ Unif[-0.5, 0.5] and X2 VaRa (X1X2) < VaRa(X1) + VaRa (X2). ~ Unif[-0.5, 0.5]arrow_forward
- 8 (Correlation and Diversification) Assume we have two stocks, A and B, show that a particular combination of the two stocks produce a risk-free portfolio when the correlation between the return of A and B is -1.arrow_forward9 (Portfolio allocation) Suppose R₁ and R2 are returns of 2 assets and with expected return and variance respectively r₁ and 72 and variance-covariance σ2, 0%½ and σ12. Find −∞ ≤ w ≤ ∞ such that the portfolio wR₁ + (1 - w) R₂ has the smallest risk.arrow_forward7 (Multivariate random variable) Suppose X, €1, €2, €3 are IID N(0, 1) and Y2 Y₁ = 0.2 0.8X + €1, Y₂ = 0.3 +0.7X+ €2, Y3 = 0.2 + 0.9X + €3. = (In models like this, X is called the common factors of Y₁, Y₂, Y3.) Y = (Y1, Y2, Y3). (a) Find E(Y) and cov(Y). (b) What can you observe from cov(Y). Writearrow_forward
- 1 (VaR and ES) Suppose X ~ f(x) with 1+x, if 0> x > −1 f(x) = 1−x if 1 x > 0 Find VaRo.05 (X) and ES0.05 (X).arrow_forwardJoy is making Christmas gifts. She has 6 1/12 feet of yarn and will need 4 1/4 to complete our project. How much yarn will she have left over compute this solution in two different ways arrow_forwardSolve for X. Explain each step. 2^2x • 2^-4=8arrow_forward
- One hundred people were surveyed, and one question pertained to their educational background. The results of this question and their genders are given in the following table. Female (F) Male (F′) Total College degree (D) 30 20 50 No college degree (D′) 30 20 50 Total 60 40 100 If a person is selected at random from those surveyed, find the probability of each of the following events.1. The person is female or has a college degree. Answer: equation editor Equation Editor 2. The person is male or does not have a college degree. Answer: equation editor Equation Editor 3. The person is female or does not have a college degree.arrow_forwardneed help with part barrow_forwardSuppose you know that Bob's test score is above the mean, but he doesn't remember by how much. At least how many students must score lower than Bob?arrow_forward
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