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

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

A quantitative statement about a population is called:

• Research hypothesis A
• Composite hypothesis B
• Simple hypothesis C
• Statistical hypothesis D

The normal distribution is --------------------distribution.

• positively skewed A
• negatively skewed B
• symmetrical C
• peaked D

The multiplicative time series model is:

• Y = T + S + C + I A
• TSCI B
• Y = a + bX C
• Y = a + bX + cX² 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

• β₁ A
• β₂ B
• β₃ C
• S_k D

A hypothesis that specifies all the value of parameter is called:

• Statistical hypothesis A
• Simple hypothesis B
• Composite hypothesis C
• None of these D

The basic components of a time series are:

• 2 A
• 3 B
• 4 C
• 5 D

Super computers can perform more than ---------------- calculations per second ?

• 1 million A
• 1 billion B
• 1 trillion C
• 1 lac D

The alternative hypothesis always contains the sign of

• equality A
• inequality B
• ratio C
• proportion 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

1 - α is the probability associated with:

• Type-I error A
• Type-II error B
• Level of confidence C
• Level of significance D

Statistic is an estimator and its calculated value is called:

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

Which hypothesis is always in an inequality form?

• Simple hypothesis A
• Alternative hypothesis B
• Null hypothesis C
• Composite hypothesis D

The elimination or addition of a few more time periods may change its

• speed A
• value B
• direction C
• none of these D

The two attributes A and B are negatively associated if

• 
  A
• 
  B
• 
  C
• 
  D

Sampling in which a sampling unit can be selected more than once is called

• simple sampling A
• sampling with replacement B
• sampling without replacement C
• none of these D