- +1-530-264-8006
- info@tutorsglobe.com

Determine the standard deviation

Let x be a random variable that represents the number of students who are absent on a given day from a class of 25. The following table lists the probability distribution of x.

X | P(X) |

0 | 0.08 |

1 | 0.18 |

2 | 0.32 |

3 | 0.22 |

4 | 0.14 |

5 | 0.06 |

a) Determine the following probabilities:

p(x = 4), p( x > 4), p ( 2 < x < than 4), and p( x greater than 1).

b)Determine the expected number of absent students on a given day.

c) Compute the variance of x by the definition.

d) Compute the variance of x by the short cut formula.

e) Determine the standard deviation of x

Expected delivery within 24 Hoursrs

18,76,764

Questions

Asked

21,311

Experts

9,67,568

Questions

Answered

Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!

Submit Assignment2015 © Tutors Globe. All rights reserved.

## Q : Distribution and parameters

James teaches a class of 300 students, and only 6 have done their homework assignment which is due today. He calls on a student at random to put a problem on the board and check to see whether he or she has done the assignment.