BSTAT 1st Edition by Gerald Keller – Test Bank

Test Bank For BSTAT 1st Edition by Gerald Keller

1. ISBN-10

   0538479825
2. ISBN-13

   978-0538479820

   CHAPTER 11: INFERENCE ABOUT A POPULATION

   TRUE/FALSE

   1. To have the ability to determine the p-price associated to hypothesis testing regarding the inhabitants indicate , it is important to know the value of the verify statistic.

   ANS: T NAT: Analytic; Hypothesis Testing

   2. To have the ability to interpret the p-price associated to hypothesis testing regarding the inhabitants indicate , it is important to know the value of the verify statistic.

   ANS: F NAT: Analytic; Hypothesis Testing

   3. If a sample has 15 observations and a 95% confidence estimate for  is required, the appropriate price of t is 1.753.

   ANS: F NAT: Analytic; Hypothesis Testing

   4. If a sample has 18 observations and a 90% confidence estimate for  is required, the appropriate price of t is 1.740.

   ANS: T NAT: Analytic; Hypothesis Testing

   5. The statistic when the sampled inhabitants is common is Scholar t-distributed with n ranges of freedom.

   ANS: F NAT: Analytic; Hypothesis Testing

   6. If the sampled inhabitants is nonnormal, the t-verify of the inhabitants indicate  continues to be official, provided that the scenario should not be extreme.

   ANS: T NAT: Analytic; Hypothesis Testing

   7. A race automotive driver examined his automotive for time from 0 to 60 mph, and in 20 assessments obtained a imply of 48.5 seconds with a typical deviation of 1.47 seconds. A 95% confidence interval for the 0 to 60 time is 45.2 seconds to 51.8 seconds.

   ANS: F NAT: Analytic; Hypothesis Testing

   8. In forming a 95% confidence interval for a inhabitants indicate from a sample dimension of 20, the number of ranges of freedom from the t-distribution equals 20.

   ANS: F NAT: Analytic; Hypothesis Testing

   9. The t-distribution is utilized in a confidence interval for a indicate when the exact regular error should not be recognized.

   ANS: T NAT: Analytic; Hypothesis Testing

   10. The t-distribution permits the calculation of confidence intervals for means for small samples when the inhabitants variance should not be recognized, regardless of the type of the distribution throughout the inhabitants.

   ANS: F NAT: Analytic; Hypothesis Testing

   11. The t-distribution is used to develop a confidence interval estimate of the inhabitants indicate when the inhabitants regular deviation is unknown.

   ANS: T NAT: Analytic; Hypothesis Testing