Q)Consider the following statements.

(i)As the number of degrees of freedom for a student's t distribution decreases, the difference between the student's t distribution and the standard normal distribution becomes smaller.

(ii)John rejected H₀, so we know that he did not commit a Type II error.

(iii)Compared to using = 0.01, choosing = 0.001 will make it less likely that a null hypothesis will be rejected.

Which of the above statements is (are) correct?

A.(i) only

B.(ii) only

C.(iii) only

D.(i) and (ii)

E.(ii) and (iii)

F.(i) and (iii)

G.(i), (ii) and (iii)

H.None of the above

Q) If a 95% confidence interval for the mean number of study hours per week has a lower limit of 18 hours and an upper limit of 23 hours, then we are 95% confident that a randomly selected student will study between 18 to 23 hours per week.

TrueFalse

Q: Consider the following statements.

(i)If an independent variable is added to a multiple regression model, the R² value will not decrease even though the added variable is not statistically significant.

(ii)The standard error of the estimate (s_e) has the same unit as the dependent variable.

Q: Which of the above statements is (are) correct?

A.(i) only

B.(ii) only

C.(i) and (ii)

D.None of the above