2nd Year Statistics Chapter 12 Online MCQ Test for 12th Class Statistics Chapter 12 (Estimation)

A specific value of an estimator computed from the sample data is called

• estimation A
• estimate B
• interval estimate C
• point estimate D

• best estimators A
• biased estimators B
• unbiased estimators C
• normal estimators D

(1-α) is called:

• Critical value A
• Level of significance B
• Level of confidence C
• Interval estimate D

By increasing the sample size, the precision of confidence interval is:

• Decreased A
• Increased B
• Constant C
• Unchanged D

If the observations are paired and the number of pairs is n, then the number of degree of freedom is equal to

• n A
• n - 1 B
• 2n C
• 2n - 1 D

Confidence intervals which are often used in practice are

• 90% A
• 95% B
• 98% C
• all of these D

Level of significance is denoted by

• 2 - α A
• 3 - α B
• α C
• 1 - α D

The process of making estimates about the population parameter from a sample is called:

• Statistical independence A
• Statistical inference B
• Statistical hypothesis C
• Statistical decision D

The standard error of the estimate increased by decreasing

• population A
• sample size B
• errors C
• precision D

A single value used to estimate a population value is called:

• Interval estimate A
• Point estimate B
• Confidence interval C
• Level of confidence D

Estimation is of two types:

• One sides and two sides A
• Type I and type II B
• Point estimation and interval estimation C
• Biased and unbiased D

Large sample contains more than

• 5 values A
• 10 values B
• 20 values C
• 30 values D

Statistic is an estimator and its calculated value is called:

• Biased estimate A
• Estimation B
• Interval estimate C
• Estimate D

The precision can be increased by  ---------------- the sample size

• increasing A
• decreasing B
• changing C
• ignoring D

The difference of upper and lower limits of confidence interval measures the

• level of significance A
• level of confidence B
• interval C
• precision D

Small sample has less than

• 50 values A
• 45 values B
• 30 values C
• 35 values D

The endpoints of a confidence interval are called:

• confidence coefficient A
• Confidence limits B
• Error of estimation C
• Parameters D