# Basic Statistic Homework due

**Question description**

1-Assume that the mean hourly cost to operate a commercial airplane follows the normal distribution with a mean of $2,150 per hour and a standard deviation of $200. |

What is the operating cost for the lowest 10 percent of the airplanes? |

2-The manufacturer of a laser printer reports the mean number of pages a cartridge will print before it needs replacing is 12,325. The distribution of pages printed per cartridge closely follows the normal probability distribution and the standard deviation is 695 pages. The manufacturer wants to provide guidelines to potential customers as to how long they can expect a cartridge to last. |

How many pages should the manufacturer advertise for each cartridge if it wants to be correct 95 percent of the time? |

More than 6 returns?

At least 6 returns?

Exactly 6 returns?

## Tutor Answer

**Quality**

**Communication**

**On Time**

**Value**

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors