Target Exam

CUET

Subject

-- Applied Mathematics - Section B2

Chapter

Inferential Statistics

Question:

Rajesh calculated 95% confidence level. What does he mean by that?

(A) He can be 95% confident that his sample will include the population parameter.
(B) He can be 95% confused that his sample will include the population parameter.
(C) He can be 5% confident that his sample will not include the population parameter.
(D) He can be 5% confident that his sample will include the population parameter.

Choose the correct answer from the options given below:

Options:

(A) and (C) only

(B) and (C) only

(D) only

(A) and (B) only

Correct Answer:

(A) and (C) only

Explanation:

The correct answer is Option (1) → (A) and (C) only

$\text{A 95% confidence level means that in repeated sampling,}$

$\text{about }95\%\text{ of the confidence intervals constructed will contain the true population parameter.}$

$\text{Hence there is }5\%\text{ probability that the interval will not contain the parameter.}$

$(A)\;\text{True.}$

$\text{Sample interval includes the population parameter with }95\%\text{ confidence.}$

$(C)\;\text{True.}$

$\text{Equivalently, there is }5\%\text{ chance that it does not include the parameter.}$

$(B)\;\text{False.}$

$(D)\;\text{False.}$

$\text{Correct statements: (A) and (C).}$