2nd Year Statistics Chapter 15 Online MCQ Test for 12th Class Statistics Chapter 15 (Association)

The value of chi-square statistic is always _______.

• Negative A
• Non-negative B
• Zero C
• One D

If 6Σd²/n(n² - 1) is zero, the value of r_s is ________.

• 0.5 A
• 1 B
• -1 C
• 0 D

The critical region of=χ2distribution is

• χ2 <χ2v; 1-α A
• χ2 <χ2v;1-α B
• χ2 <χ2 v;1-α/2 C
• χ2 <χ2v;1-α/2 D

For a 3 x 3 contingency table, the number of cells in the table are _________.

• 3 A
• 4 B
• 6 C
• 9 D

(AB), (Aβ), (αB), (αβ) are called

• positive class frequencies A
• negative class frequencies B
• natural class frequencies C
• ultimate class frequencies D

A characteristic which varies in quality from one individual to another is called an_______.

• Variable A
• Attribute B
• Associated C
• Independent D

The sample size n is reasonably large so that for each cell, the estimated expected frequency must be at least

• 2 A
• 3 B
• 4 C
• 5 D

The two attributes A and B are negatively associated if

• 
  A
• 
  B
• 
  C
• 
  D

• independent A
• positively associated B
• negatively associated C
• correlated D

The value of coefficient of association lies between

• 0 and + 1 A
• -1 and + 1 B
• -1 and 0 C
• -0.5 and + 0.5 D

• 6Σd₁ A
• 5Σd¹ B
• 
  
  
  C
• 
  D

For an r x c contingency table, the number of degrees of freedom are equal to:

• rc A
• r + c B
• (r-1)+(c-1) C
• (r-1)(c-1) D

The process of dividing the objects into two mutually exclusive classes is called_______

• Bichotomy A
• Trichotomy B
• Dichotomy C
• Multichotomy D

The total area under the curve of chi-square distribution is_______.

• 1 A
• 0.5 B
• 0 to ∞ C
• -∞ to +∞ D

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

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

• Φ² A
• q² B
• α² C
• β² D

The shape of the chi-square distribution depends upon_________.

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