To check: Whether the sample means suggest that there is a difference in the change in the DJIA after very positive articles versus after very negative articles or not.

Question

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Answer 1

Question

Chapter 21, Problem 21.40E

(a)

To determine

To check: Whether the sample means suggest that there is a difference in the change in the DJIA after very positive articles versus after very negative articles or not.

(b)

To determine

To construct: The stemplot for positive articles and negative articles.

To identify: There is any deviation from normality or not.

(c)

To determine

To test: Whether the there is good evidence that the DJIA performs differently after very positive articles than after very negative articles or not.

(d)

To determine

To check: Whether the data provide any evidence that negative articles in the press contribution to poor performance of the DJIA or not.

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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?

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…

Answer 2

Question

Chapter 21, Problem 21.40E

(a)

To determine

To check: Whether the sample means suggest that there is a difference in the change in the DJIA after very positive articles versus after very negative articles or not.

(b)

To determine

To construct: The stemplot for positive articles and negative articles.

To identify: There is any deviation from normality or not.

(c)

To determine

To test: Whether the there is good evidence that the DJIA performs differently after very positive articles than after very negative articles or not.

(d)

To determine

To check: Whether the data provide any evidence that negative articles in the press contribution to poor performance of the DJIA or not.

Expert Solution & Answer

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See solution

Answer 3

Question

Chapter 21, Problem 21.40E

(a)

To determine

To check: Whether the sample means suggest that there is a difference in the change in the DJIA after very positive articles versus after very negative articles or not.

(b)

To determine

To construct: The stemplot for positive articles and negative articles.

To identify: There is any deviation from normality or not.

(c)

To determine

To test: Whether the there is good evidence that the DJIA performs differently after very positive articles than after very negative articles or not.

(d)

To determine

To check: Whether the data provide any evidence that negative articles in the press contribution to poor performance of the DJIA or not.

Expert Solution & Answer

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See solution

Answer 4

Question

Chapter 21, Problem 21.40E

(a)

To determine

To check: Whether the sample means suggest that there is a difference in the change in the DJIA after very positive articles versus after very negative articles or not.

(b)

To determine

To construct: The stemplot for positive articles and negative articles.

To identify: There is any deviation from normality or not.

(c)

To determine

To test: Whether the there is good evidence that the DJIA performs differently after very positive articles than after very negative articles or not.

(d)

To determine

To check: Whether the data provide any evidence that negative articles in the press contribution to poor performance of the DJIA or not.

Expert Solution & Answer

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Answer 5

Chapter 21, Problem 21.40E

(a)

To determine

To check: Whether the sample means suggest that there is a difference in the change in the DJIA after very positive articles versus after very negative articles or not.

(b)

To determine

To construct: The stemplot for positive articles and negative articles.

To identify: There is any deviation from normality or not.

(c)

To determine

To test: Whether the there is good evidence that the DJIA performs differently after very positive articles than after very negative articles or not.

(d)

To determine

To check: Whether the data provide any evidence that negative articles in the press contribution to poor performance of the DJIA or not.

Answer 6

Chapter 21, Problem 21.40E

(a)

To determine

To check: Whether the sample means suggest that there is a difference in the change in the DJIA after very positive articles versus after very negative articles or not.

Answer 7

Chapter 21, Problem 21.40E

(a)

To determine

To check: Whether the sample means suggest that there is a difference in the change in the DJIA after very positive articles versus after very negative articles or not.

Answer 8

(b)

To determine

To construct: The stemplot for positive articles and negative articles.

To identify: There is any deviation from normality or not.

Answer 9

(b)

To determine

To construct: The stemplot for positive articles and negative articles.

To identify: There is any deviation from normality or not.

Answer 10

(c)

To determine

To test: Whether the there is good evidence that the DJIA performs differently after very positive articles than after very negative articles or not.

Answer 11

(c)

To determine

To test: Whether the there is good evidence that the DJIA performs differently after very positive articles than after very negative articles or not.

Answer 12

(d)

To determine

To check: Whether the data provide any evidence that negative articles in the press contribution to poor performance of the DJIA or not.

Answer 13

(d)

To determine

To check: Whether the data provide any evidence that negative articles in the press contribution to poor performance of the DJIA or not.

Answer 14

Expert Solution & Answer

Answer 15

Expert Solution & Answer

Answer 16

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Answer 17

Ch. 21.1 - Prob. 1AYK Ch. 21.1 - Prob. 2AYK Ch. 21.1 - Prob. 3AYK Ch. 21.1 - Prob. 4AYK Ch. 21.3 - Prob. 5AYK Ch. 21.3 - Prob. 6AYK Ch. 21.3 - Prob. 7AYK Ch. 21.4 - Prob. 8AYK Ch. 21.5 - Prob. 9AYK Ch. 21.5 - Prob. 10AYK

To check: Whether the sample means suggest that there is a difference in the change in the DJIA after very positive articles versus after very negative articles or not.

Videos

To check: Whether the sample means suggest that there is a difference in the change in the DJIA after very positive articles versus after very negative articles or not.

To construct: The stemplot for positive articles and negative articles.

To identify: There is any deviation from normality or not.

To test: Whether the there is good evidence that the DJIA performs differently after very positive articles than after very negative articles or not.

To check: Whether the data provide any evidence that negative articles in the press contribution to poor performance of the DJIA or not.

Want to see the full answer?

Chapter 21 Solutions

To check: Whether the sample means suggest that there is a difference in the change in the DJIA after very positive articles versus after very negative articles or not.

Videos

To check: Whether the sample means suggest that there is a difference in the change in the DJIA after very positive articles versus after very negative articles or not.

To construct: The stemplot for positive articles and negative articles. To identify: There is any deviation from normality or not.

To test: Whether the there is good evidence that the DJIA performs differently after very positive articles than after very negative articles or not.

To check: Whether the data provide any evidence that negative articles in the press contribution to poor performance of the DJIA or not.

Want to see the full answer?

Chapter 21 Solutions

To construct: The stemplot for positive articles and negative articles.

To identify: There is any deviation from normality or not.