بايو بايت - BioByte

Q14. A sample mean is 52, population mean is 50, σ = 10, n = 25. What is the Z value?

Q13. If Z = 1.96 in a two-tailed test, the significance level is:

Q12. Using the data in Q11, what is the standard error of the difference?

Q23 If r is high, the regression prediction is:

Q11. Two populations have means 120 and 100, standard deviations 20 and 25. Samples of size 16 are taken from each. What is the mean of the sampling distribution of the difference?

Q22 If the regression slope b = 0, then:

Q10. The sampling distribution of the difference between two sample means is approximately normal if:

Q21 If b is positive, then:

Q9. The significance level (α) represents:

Q8. A two-tailed test is used when the alternative hypothesis states that the mean is:

Q7. The alternative hypothesis represents:

Q20 The value of Y when X = 0 is called:

Q19 In the regression equation Y = a + bX, b represents:

Q6. Increasing the confidence level will make the confidence interval:

Q5. When population variance is known, the appropriate test for the mean is:

Q18 The general form of a simple linear regression equation is:

Q4. A confidence interval provides:

Q17 In regression, the dependent variable is usually denoted by:

Q3. The null hypothesis usually states that:

Q16 Regression analysis is mainly used to: