Conduct the required hypothesis to test by using two-standard-deviations F -test at 10% level of significance to decide whether the data provide sufficient evidence to conclude that early postnatal dexamethasone therapy increases the variation in IQ.

Question

Want to see the full answer?

Answer 1

Question

Chapter 11.2, Problem 76E

a.

To determine

Conduct the required hypothesis to test by using two-standard-deviations F-test at 10% level of significance to decide whether the data provide sufficient evidence to conclude that early postnatal dexamethasone therapy increases the variation in IQ.

b.

To determine

Obtain the 80% confidence interval using two-standard-deviations F-interval procedure to obtain the ratio of the population standard deviations of IQs with and without early postnatal dexamethasone therapy.

c.

To determine

Obtain normal probability plot for each sample.

d.

To determine

Decide whether conducting inferences as did in part (a) and (b) seem reasonable or not based on the results from part (c) and to explain the reason.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

Solve the following LP problem using the Extreme Point Theorem: Subject to: Maximize Z-6+4y 2+y≤8 2x + y ≤10 2,y20 Solve it using the graphical method. Guidelines for preparation for the teacher's questions: Understand the basics of Linear Programming (LP) 1. Know how to formulate an LP model. 2. Be able to identify decision variables, objective functions, and constraints. Be comfortable with graphical solutions 3. Know how to plot feasible regions and find extreme points. 4. Understand how constraints affect the solution space. Understand the Extreme Point Theorem 5. Know why solutions always occur at extreme points. 6. Be able to explain how optimization changes with different constraints. Think about real-world implications 7. Consider how removing or modifying constraints affects the solution. 8. Be prepared to explain why LP problems are used in business, economics, and operations research.

ged the variance for group 1) Different groups of male stalk-eyed flies were raised on different diets: a high nutrient corn diet vs. a low nutrient cotton wool diet. Investigators wanted to see if diet quality influenced eye-stalk length. They obtained the following data: d Diet Sample Mean Eye-stalk Length Variance in Eye-stalk d size, n (mm) Length (mm²) Corn (group 1) 21 2.05 0.0558 Cotton (group 2) 24 1.54 0.0812 =205-1.54-05T a) Construct a 95% confidence interval for the difference in mean eye-stalk length between the two diets (e.g., use group 1 - group 2).

An article in Business Week discussed the large spread between the federal funds rate and the average credit card rate. The table below is a frequency distribution of the credit card rate charged by the top 100 issuers. Credit Card Rates Credit Card Rate Frequency 18% -23% 19 17% -17.9% 16 16% -16.9% 31 15% -15.9% 26 14% -14.9% Copy Data 8 Step 1 of 2: Calculate the average credit card rate charged by the top 100 issuers based on the frequency distribution. Round your answer to two decimal places.

Answer 2

Question

Chapter 11.2, Problem 76E

a.

To determine

Conduct the required hypothesis to test by using two-standard-deviations F-test at 10% level of significance to decide whether the data provide sufficient evidence to conclude that early postnatal dexamethasone therapy increases the variation in IQ.

b.

To determine

Obtain the 80% confidence interval using two-standard-deviations F-interval procedure to obtain the ratio of the population standard deviations of IQs with and without early postnatal dexamethasone therapy.

c.

To determine

Obtain normal probability plot for each sample.

d.

To determine

Decide whether conducting inferences as did in part (a) and (b) seem reasonable or not based on the results from part (c) and to explain the reason.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 3

Question

Chapter 11.2, Problem 76E

a.

To determine

Conduct the required hypothesis to test by using two-standard-deviations F-test at 10% level of significance to decide whether the data provide sufficient evidence to conclude that early postnatal dexamethasone therapy increases the variation in IQ.

b.

To determine

Obtain the 80% confidence interval using two-standard-deviations F-interval procedure to obtain the ratio of the population standard deviations of IQs with and without early postnatal dexamethasone therapy.

c.

To determine

Obtain normal probability plot for each sample.

d.

To determine

Decide whether conducting inferences as did in part (a) and (b) seem reasonable or not based on the results from part (c) and to explain the reason.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 4

Question

Chapter 11.2, Problem 76E

a.

To determine

Conduct the required hypothesis to test by using two-standard-deviations F-test at 10% level of significance to decide whether the data provide sufficient evidence to conclude that early postnatal dexamethasone therapy increases the variation in IQ.

b.

To determine

Obtain the 80% confidence interval using two-standard-deviations F-interval procedure to obtain the ratio of the population standard deviations of IQs with and without early postnatal dexamethasone therapy.

c.

To determine

Obtain normal probability plot for each sample.

d.

To determine

Decide whether conducting inferences as did in part (a) and (b) seem reasonable or not based on the results from part (c) and to explain the reason.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 5

Chapter 11.2, Problem 76E

a.

To determine

Conduct the required hypothesis to test by using two-standard-deviations F-test at 10% level of significance to decide whether the data provide sufficient evidence to conclude that early postnatal dexamethasone therapy increases the variation in IQ.

b.

To determine

Obtain the 80% confidence interval using two-standard-deviations F-interval procedure to obtain the ratio of the population standard deviations of IQs with and without early postnatal dexamethasone therapy.

c.

To determine

Obtain normal probability plot for each sample.

d.

To determine

Decide whether conducting inferences as did in part (a) and (b) seem reasonable or not based on the results from part (c) and to explain the reason.

Answer 6

Chapter 11.2, Problem 76E

a.

To determine

Conduct the required hypothesis to test by using two-standard-deviations F-test at 10% level of significance to decide whether the data provide sufficient evidence to conclude that early postnatal dexamethasone therapy increases the variation in IQ.

Answer 7

Chapter 11.2, Problem 76E

a.

To determine

Conduct the required hypothesis to test by using two-standard-deviations F-test at 10% level of significance to decide whether the data provide sufficient evidence to conclude that early postnatal dexamethasone therapy increases the variation in IQ.

Answer 8

b.

To determine

Obtain the 80% confidence interval using two-standard-deviations F-interval procedure to obtain the ratio of the population standard deviations of IQs with and without early postnatal dexamethasone therapy.

Answer 9

b.

To determine

Obtain the 80% confidence interval using two-standard-deviations F-interval procedure to obtain the ratio of the population standard deviations of IQs with and without early postnatal dexamethasone therapy.

Answer 10

c.

To determine

Obtain normal probability plot for each sample.

Answer 11

c.

To determine

Obtain normal probability plot for each sample.

Answer 12

d.

To determine

Decide whether conducting inferences as did in part (a) and (b) seem reasonable or not based on the results from part (c) and to explain the reason.

Answer 13

d.

To determine

Decide whether conducting inferences as did in part (a) and (b) seem reasonable or not based on the results from part (c) and to explain the reason.

Answer 14

Expert Solution & Answer

Answer 15

Expert Solution & Answer

Answer 16

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 17

Ch. 11.1 - What is meant by saying that a variable has a...Ch. 11.1 - How are different chi-square distributions...Ch. 11.1 - Two 2-curves have degrees of freedom 12 and 20,...Ch. 11.1 - The t-table has entries for areas of 0.10, 0.05,...Ch. 11.1 - Prob. 5E Ch. 11.1 - Prob. 6E Ch. 11.1 - In Exercises 11.511.2, use Table VII to find the...Ch. 11.1 - Prob. 8E Ch. 11.1 - Prob. 9E Ch. 11.1 - Prob. 10E

Conduct the required hypothesis to test by using two-standard-deviations F -test at 10% level of significance to decide whether the data provide sufficient evidence to conclude that early postnatal dexamethasone therapy increases the variation in IQ.

Solution Summary: The author states the null hypothesis and alternative hypothesis. The data represents the school-age IQs of the 72 children in the dexamethasone group and the 74

Concept explainers

Videos

Conduct the required hypothesis to test by using two-standard-deviations F-test at 10% level of significance to decide whether the data provide sufficient evidence to conclude that early postnatal dexamethasone therapy increases the variation in IQ.

Obtain the 80% confidence interval using two-standard-deviations F-interval procedure to obtain the ratio of the population standard deviations of IQs with and without early postnatal dexamethasone therapy.

Obtain normal probability plot for each sample.

Decide whether conducting inferences as did in part (a) and (b) seem reasonable or not based on the results from part (c) and to explain the reason.

Want to see the full answer?

Chapter 11 Solutions