In a frequency curve, what is plotted on the vertical axis?
Class frequencies
In a frequency curve, the vertical axis represents the class frequencies, which indicate the number of observations within each class interval.
Important Questions from Probability and Statistics
In an examination involving multiple choice questions, a student works out the solution in 50% of the questions. In the remaining questions the student guesses the answer. However, when the answer is guessed the probability that it is correct is 0.30. When the student works out the solutions it may be wrong with probability 0.10.
If the answer to a particular question is correct, what is the probability that the student guessed the answer?
The probability that a teacher will give an unannounced test during any class is 1/5. If a student is absent twice, then probability that misses atleast one test is
A fair coin is tossed independently four times. The probability of the event “the number of times heads show up is more than the number of times tails show up" is
Lifetime of an electric bulb is a random variable with density f(x) = kx2, where x is measured in years. If the minimum and maximum lifetimes of bulb are 1 and 2 years respectively, then the value of k is ______
If the probability of a bad reaction from a certain injection is 0.001, the chance that out of 2000 individuals, more than two will suffer of a bad reaction is
