12th Class Statistics MCQ Test With Answer for Statistics Full Book

A region for which the H_o is rejected is called

• acceptance region A
• rejection region B
• critical region C
• both b and c D

The probability density function has ------------------ value for every value of x.

• negative A
• positive B
• minimum C
• maximum D

P(type I error) is equal to:

• 1 - α A
• 1 - β B
• α C
• β D

In simple linear regression, the number of unknown constants are:

• Two A
• Three B
• Four C
• Five D

When the expected frequencies are very small the value of=χ2has been

• adjusted A
• omitted B
• changed C
• all of these D

1 - α is the probability associated with:

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

___________ is a set of electronic instructions:

• Hardware A
• Software B
• Hard disk C
• Compact disk D

In time series seasonal variations can occur within a period of:

• Nine years A
• Four Years B
• Three years C
• One year D

• S_xy A
• S_yx B
• b_xy C
• b_yx D

Level of significance is denoted by

• 2 - α A
• 3 - α B
• α C
• 1 - α D

The shape of the chi-square distribution depends upon_________.

• Parameters A
• Number of cells B
• Degrees of freedom C
• Standard deviation D

The regression equation always passes throught_________.

• (X, Y) A
• (X, y̅) B
• (X̅, Y) C
• (X̅, y̅) D

In a systematic sampling every ------------ unit is selected

• 1^st A
• last B
• xth C
• normal D

The additive model of the time series is:

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

In the measurement of secular trend the moving averages:

• Give the trend in a straight line A
• Measure the seasonal variations B
• Smooth out a time series C
• None of these D

If (AB) = (A)(B)/n, the two attributes. A and B are _________.

• Independent A
• Dependent B
• Correlated C
• Quantitative D

P(type II error) is equal to:

• α A
• β B
• 1 - α C
• 1 - β D