12th class Statistics chapter 12 online mcq test with answers for ICS part 2 Statistics chapter 12 (Estimation)

Question # 1

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

Decreased A
Increased B
Constant C
Unchanged D

Question # 2

If 1-α = 0.90, the value of Z_a/2 is:

1.645 A
1.96 B
2.326 C
2.575 D

Question # 3

The probability associated with confidence interval is called:

Level of confidence A
Confidence coefficient B
Both A and B C
Confidence limits D

Question # 4

The endpoints of a confidence interval are called:

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

Question # 5

100(1-α)% confidence interval for population proportion of success,&=nbsp;π is

P (L <μ < U) = 1 - α A
P (L <σ < U) = 1 - α B
P (L <π< U) = 1 - α C
P (L <P&=nbsp;< U) = 1 - α D

Question # 6

Statistical inference has two branches namely:

Level of confidence and degrees of freedom A
Biased estimator and unbiased estimator B
Point estimate and interval estimate C
Estimation of parameter and testing of hypothesis D

Question # 7

An estimator is ------------ if its expected value is equal to the population parameter to be estimated

bad A
biased B
unbiased C
none of these D

Question # 8

Small sample has less than

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

Question # 9

The standard error of the estimate increased by decreasing

population A
sample size B
errors C
precision D

Question # 10

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

estimation A
estimate B
interval estimate C
point estimate D

Question # 11

Estimate is the observed value of an:

Unbiased estimator A
Estimation B
Estimator C
Interval estimation D

Question # 12

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

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

Question # 13

A range of values used to estimate an unknown population parameter is

a point estimator A
An interval estimator B
an unbiased estimator C
A biased estimator D

Question # 14

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

increasing A
decreasing B
changing C
ignoring D

Question # 15

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

Question # 16

Confidence intervals which are often used in practice are

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

Question # 17

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

Sr.#	Question	Answer
1	The process of making estimates about the population parameter from a sample is called:	A. Statistical independence B. Statistical inference C. Statistical hypothesis D. Statistical decision
2	The difference of upper and lower limits of confidence interval measures the	A. level of significance B. level of confidence C. interval D. precision
3	100(1-α)% confidence interval for population proportion of success,&=nbsp;π is	A. P (L <μ < U) = 1 - α B. P (L <σ < U) = 1 - α C. P (L <π< U) = 1 - α D. P (L <P&=nbsp;< U) = 1 - α
4	Estimation is of two types:	A. One sides and two sides B. Type I and type II C. Point estimation and interval estimation D. Biased and unbiased
5	The endpoints of a confidence interval are called:	A. confidence coefficient B. Confidence limits C. Error of estimation D. Parameters
6	If (1-α) is increased, the with of a confidence interval is:	A. Decreased B. Increased C. Constant D. Same
7	If 1-α = 0.90, the value of Z_a/2 is:	A. 1.645 B. 1.96 C. 2.326 D. 2.575
8	The probability associated with confidence interval is called:	A. Level of confidence B. Confidence coefficient C. Both A and B D. Confidence limits
9	If population proportion (P) is unknown, the standard error of the sample proportion (p) can be estimated by the formula
10	A specific value of an estimator computed from the sample data is called	A. estimation B. estimate C. interval estimate D. point estimate

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ICS Part 2 Statistics Chapter 12 Online Test

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

If 1-α = 0.90, the value of Za/2 is:

The probability associated with confidence interval is called:

The endpoints of a confidence interval are called:

100(1-α)% confidence interval for population proportion of success,&=nbsp;π is

Statistical inference has two branches namely:

An estimator is ------------ if its expected value is equal to the population parameter to be estimated

Small sample has less than

The standard error of the estimate increased by decreasing

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

Estimate is the observed value of an:

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

A range of values used to estimate an unknown population parameter is

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

Estimation is of two types:

Confidence intervals which are often used in practice are

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

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If 1-α = 0.90, the value of Z_a/2 is: