Discrete probability distribution - sample mean and variance
Below is a frequency table for the number of heads when four coins are tossed 64 times.
xi | 0 | 1 | 2 | 3 | 4 | fi | 5 | 15 | 25 | 16 | 3 |
(a) Calculate the sample mean.
(b) Find the sample variance.
(c) Find the estimated probability there will be less than three heads on a toss.
Important This is not a 'textbook on a screen' - this is an interactive learning system. Which means you have to 'act' to make it go.
Look through the options below and select the one you think is the best response. You will gain most benefit if you work the problem with pen and paper as you go, i.e. decide what you think is the correct option and write down what you think the result will be before you click. If the next step doesn't display, click another option.
How do you calculate the sample mean?
==>>