Stats
5th Edition
ISBN: 9780135163825
Author: De Veaux, Richard D., Velleman, Paul F., BOCK, David E.
Publisher: Pearson,
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Chapter R, Problem 7.10RE
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Calculate the 90% confidence interval for the population mean difference using the data in the attached image. I need to see where I went wrong.
Microsoft Excel snapshot for random sampling: Also note the formula used for the last
column
02
x✓ fx =INDEX(5852:58551, RANK(C2, $C$2:$C$51))
A
B
1
No.
States
2
1
ALABAMA
Rand No.
0.925957526
3
2
ALASKA
0.372999976
4
3
ARIZONA
0.941323044
5
4 ARKANSAS
0.071266381
Random Sample
CALIFORNIA
NORTH CAROLINA
ARKANSAS
WASHINGTON
G7
Microsoft Excel snapshot for systematic sampling:
xfx INDEX(SD52:50551, F7)
A
B
E
F
G
1
No.
States
Rand No. Random Sample
population
50
2
1 ALABAMA
0.5296685 NEW HAMPSHIRE
sample
10
3
2 ALASKA
0.4493186 OKLAHOMA
k
5
4
3 ARIZONA
0.707914 KANSAS
5
4 ARKANSAS 0.4831379 NORTH DAKOTA
6
5 CALIFORNIA 0.7277162 INDIANA
Random Sample
Sample Name
7
6 COLORADO 0.5865002 MISSISSIPPI
8
7:ONNECTICU 0.7640596 ILLINOIS
9
8 DELAWARE 0.5783029 MISSOURI
525
10
15
INDIANA
MARYLAND
COLORADO
Suppose the Internal Revenue Service reported that the mean tax refund for the year 2022 was $3401. Assume the standard deviation is $82.5 and that the amounts refunded follow a normal probability distribution. Solve the following three parts? (For the answer to question 14, 15, and 16, start with making a bell curve. Identify on the bell curve where is mean, X, and area(s) to be determined.
1.What percent of the refunds are more than $3,500?
2. What percent of the refunds are more than $3500 but less than $3579?
3. What percent of the refunds are more than $3325 but less than $3579?
Chapter R Solutions
Stats
Ch. R - Prob. 1.1RECh. R - R1.2. Prenatal care Results of a 1996 American...Ch. R - R1.3. Singers by parts The boxplots display the...Ch. R - Prob. 1.4RECh. R - Prob. 1.5RECh. R - Prob. 1.6RECh. R - R1.7. State University Public relations staff...Ch. R - R1.8. Shenandoah rain Based on long-term...Ch. R - Prob. 1.9RECh. R - Prob. 1.10RE
Ch. R - Prob. 1.11RECh. R - R1.12. e-Books A study by the Pew Internet &...Ch. R - Prob. 1.13RECh. R - R1.14. Accidents Progressive Insurance asked...Ch. R - Prob. 1.15RECh. R - R1.16. Hard water II The data set from England and...Ch. R - Prob. 1.17RECh. R - R1.18. Old Faithful It is a common belief that...Ch. R - R1.19. Old Faithful? Does the duration of an...Ch. R - R1.20. Teen drivers 2013 The National Highway...Ch. R - Prob. 1.21RECh. R - Women’s Short Track 2018 The times of skaters in...Ch. R - Prob. 1.23RECh. R - R1.24. Sluggers Babe Ruth was the first great...Ch. R - Prob. 1.25RECh. R - R1.26. Music and memory Is it a good idea to...Ch. R - Prob. 1.27RECh. R - R1.28. Birth order Is your birth order related to...Ch. R - Prob. 1.29RECh. R - R1.30. Birth order revisited Consider again the...Ch. R - Prob. 1.31RECh. R - R1.32. Engines, again Horsepower is another...Ch. R - R1.33. Age and party 2011 The Pew Research Center...Ch. R - R1.34. Pay According to the Bureau of Labor...Ch. R - Prob. 1.35RECh. R - R1.36. Bike safety 2015 The Bicycle Helmet Safety...Ch. R - Prob. 1.37RECh. R - Prob. 1.38RECh. R - Prob. 1.41RECh. R - Prob. 1.42RECh. R - R1.43. Student survey investigation The Student...Ch. R - Prob. 1.44RECh. R - Prob. 2.1RECh. R - Prob. 2.2RECh. R - Prob. 2.3RECh. R - Prob. 2.4RECh. R - Prob. 2.5RECh. R - Prob. 2.6RECh. R - Prob. 2.7RECh. R - Prob. 2.8RECh. R - Prob. 2.9RECh. R - Prob. 2.10RECh. R - Prob. 2.11RECh. R - Prob. 2.12RECh. R - Prob. 2.13RECh. R - Prob. 2.14RECh. R - R2.15. Cars, correlations What factor most...Ch. R - R2.16. Cars, associations Look again at the...Ch. R - Prob. 2.17RECh. R - Prob. 2.18RECh. R - Prob. 2.19RECh. R - Prob. 2.20RECh. R - Prob. 2.21RECh. R - Prob. 2.22RECh. R - Prob. 2.23RECh. R - Prob. 2.24RECh. R - Prob. 2.25RECh. R - Prob. 2.26RECh. R - Prob. 2.27RECh. R - Prob. 2.28RECh. R - Prob. 2.29RECh. R - Prob. 2.30RECh. R - Prob. 2.31RECh. R - Prob. 2.32RECh. R - Prob. 2.33RECh. R - Prob. 2.34RECh. R - Prob. 2.35RECh. R - Prob. 2.36RECh. R - Prob. 2.37RECh. R - Prob. 2.38RECh. R - Prob. 2.39RECh. R - Prob. 2.40RECh. R - Prob. 2.41RECh. R - Prob. 2.42RECh. R - Prob. 2.43RECh. R - Prob. 2.44RECh. R - Prob. 2.45RECh. R - Prob. 2.46RECh. R - Prob. 2.47RECh. R - Prob. 2.48RECh. R - Prob. 2.49RECh. R - Prob. 2.50RECh. R - Prob. 2.51RECh. R - Prob. 2.52RECh. R - Prob. 3.1RECh. R - Prob. 3.2RECh. R - Prob. 3.3RECh. R - Prob. 3.4RECh. R - Prob. 3.5RECh. R - Prob. 3.6RECh. R - Prob. 3.7RECh. R - Prob. 3.8RECh. R - Prob. 3.9RECh. R - R3.1–R3.18. What design? Analyze the design of...Ch. R - Prob. 3.11RECh. R - Prob. 3.12RECh. R - Prob. 3.13RECh. R - Prob. 3.14RECh. R - Prob. 3.15RECh. R - Prob. 3.16RECh. R - R3.1–R3.18. What design? Analyze the design of...Ch. R - R3.1–R3.18. What design? Analyze the design of...Ch. R - Prob. 3.19RECh. R - Prob. 3.20RECh. R - R3.21. Alternate day fasting A paper published in...Ch. R - Prob. 3.22RECh. R - Prob. 3.23RECh. R - R3.24. Tips, take 2 In another experiment to see...Ch. R - Prob. 3.25RECh. R - Prob. 3.26RECh. R - Prob. 3.27RECh. R - R3.29. Homecoming A college statistics class...Ch. R - Prob. 3.29RECh. R - R3.31. Smoking and Alzheimer’s Medical studies...Ch. R - R3.32. Antacids A researcher wants to compare the...Ch. R - Prob. 3.32RECh. R - Prob. 3.33RECh. R - Prob. 3.34RECh. R - Prob. 3.35RECh. R - Prob. 3.36RECh. R - Prob. 3.37RECh. R - Prob. 3.38RECh. R - R3.39. Acupuncture Research reported in 2008...Ch. R - R3.40. Fuel efficiency Wayne Collier designed an...Ch. R - Prob. 3.41RECh. R - R3.42. Internet speed Carsten, Matt, and Rainer...Ch. R - Prob. 4.1RECh. R - Prob. 4.2RECh. R - Prob. 4.3RECh. R - Bipolar Psychiatrists estimate that about 1 in 100...Ch. R - A game To play a game, you must pay $5 for each...Ch. R - Prob. 4.6RECh. R - Prob. 4.7RECh. R - Prob. 4.8RECh. R - Prob. 4.9RECh. R - Prob. 4.10RECh. R - Prob. 4.11RECh. R - Prob. 4.12RECh. R - Prob. 4.13RECh. R - Prob. 4.14RECh. R - Prob. 4.15RECh. R - R4.17. Stocks Since the stock market began in...Ch. R - Multiple choice A multiple choice test has 50...Ch. R - Prob. 4.18RECh. R - Prob. 4.19RECh. R - Prob. 4.20RECh. R - Prob. 4.21RECh. R - Prob. 4.22RECh. R - Prob. 4.23RECh. R - Prob. 4.24RECh. R - Prob. 4.25RECh. R - Meals A college student on a seven-day meal plan...Ch. R - Prob. 4.27RECh. R - Picking melons Two stores sell watermelons. At the...Ch. R - Prob. 4.29RECh. R - Prob. 4.30RECh. R - Prob. 4.31RECh. R - Prob. 4.32RECh. R - Prob. 4.33RECh. R - Prob. 4.34RECh. R - Prob. 4.35RECh. R - Prob. 4.36RECh. R - Prob. 4.37RECh. R - Prob. 4.38RECh. R - Prob. 4.39RECh. R - Prob. 4.40RECh. R - Prob. 4.41RECh. R - Prob. 4.42RECh. R - Prob. 4.43RECh. R - Prob. 4.44RECh. R - Prob. 5.1RECh. R - Prob. 5.2RECh. R - Prob. 5.3RECh. R - R4.10. Hamsters How large are hamster litters?...Ch. R - Prob. 5.5RECh. R - R4.13. Fake news In a survey of 1002 U.S. adults...Ch. R - Prob. 5.7RECh. R - Prob. 5.8RECh. R - Prob. 5.9RECh. R - Prob. 5.10RECh. R - Prob. 5.11RECh. R - Prob. 5.12RECh. R - Prob. 5.13RECh. R - Prob. 5.14RECh. R - Prob. 5.15RECh. R - R4.27. Language Neurological research has shown...Ch. R - Prob. 5.17RECh. R - Prob. 5.18RECh. R - Prob. 5.19RECh. R - Prob. 5.20RECh. R - Prob. 5.21RECh. R - Prob. 5.22RECh. R - Prob. 5.23RECh. R - Prob. 5.24RECh. R - Prob. 5.25RECh. R - Prob. 5.26RECh. R - Prob. 5.27RECh. R - Prob. 5.28RECh. R - Prob. 5.29RECh. R - Prob. 5.30RECh. R - Prob. 5.31RECh. R - Prob. 5.32RECh. R - Prob. 5.33RECh. R - Prob. 5.34RECh. R - Prob. 5.35RECh. R - Prob. 5.36RECh. R - Prob. 5.37RECh. R - Prob. 5.38RECh. R - Prob. 5.39RECh. R - Prob. 5.40RECh. R - Prob. 6.1RECh. R - Prob. 6.2RECh. R - Prob. 6.3RECh. R - Prob. 6.4RECh. R - Prob. 6.5RECh. R - Prob. 6.6RECh. R - R5.7. Eclampsia deaths Refer again to the research...Ch. R - Prob. 6.8RECh. R - Prob. 6.9RECh. R - Prob. 6.10RECh. R - Prob. 6.11RECh. R - Prob. 6.12RECh. R - Prob. 6.13RECh. R - Prob. 6.14RECh. R - Prob. 6.15RECh. R - Prob. 6.17RECh. R - Prob. 6.18RECh. R - Prob. 6.19RECh. R - Prob. 6.20RECh. R - Prob. 6.21RECh. R - Prob. 6.23RECh. R - Prob. 6.25RECh. R - Prob. 6.28RECh. R - Prob. 6.29RECh. R - Prob. 6.30RECh. R - Prob. 6.31RECh. R - Prob. 6.32RECh. R - Prob. 6.33RECh. R - Prob. 6.34RECh. R - Prob. 6.35RECh. R - Prob. 6.36RECh. R - Prob. 6.37RECh. R - R5.38. Age and party 2016 The Pew Research Center...Ch. R - Prob. 6.39RECh. R - Prob. 6.40RECh. R - Prob. 6.41RECh. R - Prob. 6.42RECh. R - Prob. 6.43RECh. R - Prob. 6.44RECh. R - Prob. 6.45RECh. R - Prob. 6.46RECh. R - Prob. 6.47RECh. R - Prob. 6.48RECh. R - Prob. 6.49RECh. R - R5.50. Cramming Students in two basic Spanish...Ch. R - Prob. 6.51RECh. R - Prob. 6.52RECh. R - Prob. 7.3RECh. R - Prob. 7.4RECh. R - Prob. 7.5RECh. R - Prob. 7.6RECh. R - Prob. 7.7RECh. R - Prob. 7.8RECh. R - Prob. 7.9RECh. R - Prob. 7.10RECh. R - Prob. 7.11RECh. R - Nuclear plants Here are data on 32 light water...Ch. R - Prob. 7.13RECh. R - Prob. 7.15RECh. R - Prob. 7.16RECh. R - Prob. 7.17RECh. R - Prob. 7.18RECh. R - Prob. 7.19RECh. R - Prob. 7.20RECh. R - Prob. 7.21RECh. R - Prob. 7.23RECh. R - Prob. 7.24RECh. R - Prob. 7.25RECh. R - Prob. 7.27RECh. R - Prob. 7.28RECh. R - Prob. 7.29RE
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- A normal distribution has a mean of 50 and a standard deviation of 4. Solve the following three parts? 1. Compute the probability of a value between 44.0 and 55.0. (The question requires finding probability value between 44 and 55. Solve it in 3 steps. In the first step, use the above formula and x = 44, calculate probability value. In the second step repeat the first step with the only difference that x=55. In the third step, subtract the answer of the first part from the answer of the second part.) 2. Compute the probability of a value greater than 55.0. Use the same formula, x=55 and subtract the answer from 1. 3. Compute the probability of a value between 52.0 and 55.0. (The question requires finding probability value between 52 and 55. Solve it in 3 steps. In the first step, use the above formula and x = 52, calculate probability value. In the second step repeat the first step with the only difference that x=55. In the third step, subtract the answer of the first part from the…arrow_forwardIf a uniform distribution is defined over the interval from 6 to 10, then answer the followings: What is the mean of this uniform distribution? Show that the probability of any value between 6 and 10 is equal to 1.0 Find the probability of a value more than 7. Find the probability of a value between 7 and 9. The closing price of Schnur Sporting Goods Inc. common stock is uniformly distributed between $20 and $30 per share. What is the probability that the stock price will be: More than $27? Less than or equal to $24? The April rainfall in Flagstaff, Arizona, follows a uniform distribution between 0.5 and 3.00 inches. What is the mean amount of rainfall for the month? What is the probability of less than an inch of rain for the month? What is the probability of exactly 1.00 inch of rain? What is the probability of more than 1.50 inches of rain for the month? The best way to solve this problem is begin by a step by step creating a chart. Clearly mark the range, identifying the…arrow_forwardClient 1 Weight before diet (pounds) Weight after diet (pounds) 128 120 2 131 123 3 140 141 4 178 170 5 121 118 6 136 136 7 118 121 8 136 127arrow_forward
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