Statistics 101 homework:

1. Determine the mean, median, and mode for the following data set,

then decide which is the best measure of central tendency if the data

reflects a set of measurements of a physical constant.

{1. 39, 1. 28, 1. 32, 1. 22, 1. 37, 1. 35, 1. 34, 1. 29, 1. 30, 6. 98, 1. 27, 1.31}

2. A combination lock has three wheels1 each containing the numbers zero through nine. How manypossible combinations are there for the lock?

3. A lottery drawing selects 4 out of 10 numbers (without rep1acement). If a player can choose four numbers but must only match three to win, what is the player’s probability of winning the lottery?

**4****. ****What is the cumulative re****l****at****i****ve frequency of each outcome for the roll of a fa****i****r**

**six-s****i****ded d****i****e?**

** **

5. Calculate the z-score in each case for a normal distribution with mean (J) and

standard deviation a.

a. X = 45, J = 50, a = 5

b. X= 1, J = 2, a= 0.1

c. X = 14, J = 12, a = 4

6. Calculate the probability P{X <= x) in each case for a normal distribution with

mean 3 and standard deviation = 0.5.

a. 1. 9

b. 4

c. 2. 9

**7****. ****Two independent d****i****screte random variables **X **and **Y **have **marginal

**distributions f**1 **(x) = X/21 and f**2**(y) = **y/36 **for certain sets of values x**

**and y****. ****Find the bivariate distribut****i****on f{ **x, **y)****.**

** **

8 . Determine the critical value c for a normally distributed random

variable with mean = 0 and variance a2 = 100 for each of the

following significance levels.

a. 0.01

b. 0.05

c. 0.10

9 . What is the probability of a Type I error if the following significance

levels are chosen?

**a****. ****0****.****05**

**b****. ****0.01**

Subject | Mathematics |

Due By (Pacific Time) | 10/08/2013 12:00 am |

Tutor | Rating |
---|---|

pallavi Chat Now! |
out of 1971 reviews More.. |

amosmm Chat Now! |
out of 766 reviews More.. |

PhyzKyd Chat Now! |
out of 1164 reviews More.. |

rajdeep77 Chat Now! |
out of 721 reviews More.. |

sctys Chat Now! |
out of 1600 reviews More.. |

sharadgreen Chat Now! |
out of 770 reviews More.. |

topnotcher Chat Now! |
out of 766 reviews More.. |

XXXIAO Chat Now! |
out of 680 reviews More.. |