Answer to Question #146501 in Statistics and Probability for ken

Question

TRUE OR FALSE
6. The z test formula uses the sample standard deviation while the
t test formula uses the population standard deviation.

7. The critical t value(s) does not depend on the degrees of freedom
associated with the t test value.

8. A type I error occurs when a researcher unknowingly obtains an
extreme non-representative example.

9. The null hypothesis should be rejected if the critical value is – 2.4,

α = 0.01, and the test is left-tailed.

10.Given (101, 120) as the confidence interval for the population mean
μ with a confidence level of 95% indicates that there is a 95% chance
that the population mean lies between 101 and 120.

Answer 1

6. FALSE. Z test uses the. Population standard deviation, while t test uses sample standard deviation

7.FALSE. critical t value depends on the degrees of freedom associated with the t test value.

8. TRUE. Obtaining a non representative extreme sample leads to the rejection of true null hypothesis.

9. FALSE the null hypothesis is rejected when the test statistic is less than the critical value when the test is left tailed.

10. FALSE. We are 95% confident that the population mean will fall within the interval.