Stats Help for College-level Students

Calculating the probability from two independent events.

The probability I'll jog today is 0.90 and the probability you'll jog tonight is 0.30. Find the probability: a) I'll jog and you don't jog. b) You'll jog and I don't jog. c) We'll both jog. d) Neither of us will jog.

Calculating the probability from the given situation.

A wheel with the following probabilities is spun: Prob(1)= 0.50, Prob (2) = 0.20, Prob (3) = 0.30 If the wheel is spun 3 times find probability that the sum of numbers you get = 6

Calculating the probability from the given product defective situation.

35% of products made by company Z are defective. A sample of 9 products is chosen. Find: a) The probability that 2 are defective b) The probability that 3 are defective c) The probability that none are defective

Probability

A) A coin is tossed 20 times. Find probability of getting at least 14 heads. B) A die is tossed 20 times. Find probability of getting a "1" two times. C) Three dice are tossed. Find probability that a four shows on exactly two of the dice.

Testing for independence

Suppose that a survey of 100 individuals who live in the western region of New York was conducted. The party affiliation (Democrat, Independent, Republican) of each individual surveyed was recorded, as well as their response to the following three questions: Questions of Study 1. Should legislative pay be cut for every day ...continues

present and justify hypotheses

I need to present and briefly justify four hypotheses involving relation between pairs of variables, using the same variable as dependent. The variables I would like to use are: Immigr (DV) Income, education, and age (IV) Can you help me with this problem? Thank you,

Hypothesis testing

In order to estimate the differences between the average miles per galon of two differant models of automobiles, samples are taken and the following information is collected. Model A Model B sample size 50 55 sample mean 32 35 ...continues

Hypothesis testing

MNM Inc, has their stores located at three different locations. Random samples of the daily sales of the three stores (in $1,00) are shown below. Stores 1 store 2 store 3 9 10 6 8 11 7 7 10 8 ...continues

Test statistics

The data below represents fields of specialization for the randomly selected sample of undergraduate students. Test to determine whether there is a significant difference in the fields of specialization between regions of the country. Use a=.05 Northeast Midwest south west Total Business 54 ...continues

Hypothesis testing

Independent random samples taken at two companies provide the following information regarding the anual salaries of the employees. WhitneyCo. Max Co. sample size 72 50 Sample mean (in$1000) 48 43 Sample standard deviatio ...continues