shape of normal distribution curve-: (A) J shape, (B) U shape, (C) Bell shape, (D) None
Answer is C. Ref:Parks 23rd edition pg 849. Standard normal curve: It is a smooth, bell-shaped, perfectly symmetrical curve based on an infinitely large number of observations. The total area of the curve is 1 . Mean =0 Standard detion is 1 Mean, median and mode all coincide .