Exam 8: Estimation: Additional Topics
Exam 1: Describing Data: Graphical247 Questions
Exam 2: Describing Data: Numerical326 Questions
Exam 3: Probability345 Questions
Exam 4: Discrete Random Variables and Probability Distributions257 Questions
Exam 5: Continuous Random Variables and Probability Distributions239 Questions
Exam 6: Sampling and Sampling Distributions147 Questions
Exam 7: Estimation: Single Population151 Questions
Exam 8: Estimation: Additional Topics109 Questions
Exam 9: Hypothesis Testing: Single Population164 Questions
Exam 10: Hypothesis Testing: Additional Topics103 Questions
Exam 11: Simple Regression217 Questions
Exam 12: Multiple Regression252 Questions
Exam 13: Additional Topics in Regression Analysis168 Questions
Exam 14: Analysis of Categorical Data241 Questions
Exam 15: Analysis of Variance192 Questions
Exam 16: Time-Series Analysis and Forecasting138 Questions
Exam 17: Additional Topics in Sampling110 Questions
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THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
The residents of Austin,Texas,complain that parking fines given in their city are higher than the parking fines that are given in Houston.Independent random samples of the amounts paid by residents for parking tickets in each of two cities over the last four months were obtained.Assume the population variances are equal.These amounts were as follows:
-Determine the number of degrees of freedom.

(Multiple Choice)
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THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
A confidence interval for the difference between the means of two normally distributed populations based on the following dependent samples is desired:
-What is the margin of error at 95% Confidence interval?

(Multiple Choice)
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THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
The residents of Austin,Texas,complain that parking fines given in their city are higher than the parking fines that are given in Houston.Independent random samples of the amounts paid by residents for parking tickets in each of two cities over the last four months were obtained.Assume the population variances are equal.These amounts were as follows:
-What is the sample variance of the parking fines issued in Houston?

(Multiple Choice)
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THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
n1 = 35,
1 = 140
= 60.84;n2 = 48,
2 = 130,and
= 156.25
-Find the margin of error for a 95% confidence interval for the difference in the means of the two populations assuming that the population variances are equal.




(Multiple Choice)
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The mean of the sampling distribution of the difference between sample proportions,
1 -
2,is equal to the difference between the corresponding population proportions,P1 - P2.


(True/False)
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THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
nx = 360,
x = 0.69,ny = 350,
y = 0.76
-What is the upper confidence limit of the 98% confidence interval for the difference in population proportions?


(Multiple Choice)
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THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
In calculating the 95% confidence interval for μ1 - μ2 the difference between the means of two normally distributed populations,the summary statistics from two independent samples are:
nx = 10,
= 50,
= 0.64,ny = 10,
= 40,and
= 1.86.
-What is the upper confidence limit of the 95% confidence interval if the Population variances are unknown and are assumed to be equal?




(Multiple Choice)
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THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
The residents of Austin,Texas,complain that parking fines given in their city are higher than the parking fines that are given in Houston.Independent random samples of the amounts paid by residents for parking tickets in each of two cities over the last four months were obtained.Assume the population variances are equal.These amounts were as follows:
-What is the mean of the parking fines issued in Austin?

(Multiple Choice)
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Based on the 90% confidence interval for the difference in the means of the two populations,is there evidence that the population means are different?
(Essay)
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