**661. When we add the lower and upper class limits and dividing the sum by, the values so obtained are called class____________?**

A. Interval

B. Histogram

C. Limits**D. Marks**

**662. In a table, foot note and source notes are ___________________?**

A. Same**B. Different**

C. Identical

D. Non-identical

**663. A graph of cumulative frequency distribution is called ________________?**

A. Histrogram

B. Frequency Polgon**C. Ogive**

D. None of above

**664. Normal distribution is _____ distribution?****A. Symmetrical**

B. non-symmetrical

C. + vely skewed

D. -vely skewed

**665. Total area under the normal curve is________?**

A. 100**B. 1**

C. 50%

D. 1%

**666. For +ve and -ve skewed, check the sign of _______?**

A. β1

B. µ2

C. β2**D. µ3**

**667. In normal distribution β1 = 0 and β2 is equal to _____________?**

A. 0.5

B. 1

C. 2**D. 3**

**668. If “X” is normally distribution with >µ= 8 and S.D. 4, then P(6≤X≤10) may be______________?**

A. 0

B. -0.32

C. 1.2**D. 0.2684**

**669. In a certain normal distribution having µ = 35 and variance = 16, then mode will be_______________?****A. 3.5**

B. 16

C. 4

D. None of these

**670. The value maximum ordinate of a standard normal curve at Z = 0 is:________?**

A. 1

B. 0.5**C. 0.3989**

D. None of these