Stats Help for College-level Students

A statistical excercise in portfolio selection.

An investor has a certain amount of money available to invest now. Three alternative portfolio selections are available. The estimated profits of each portfolio under each economic condition are indicated in below table: Portfolio Selection Event A B ...continues

find the probability of an event.

1.The Census Bureau reports that 55% of all 3-to-5-year-old children attended preschool programs at least a portion of the day. If 18 children are chosen at random, what is the probability that fewer than six children attend such a program? 2. Experimenters in ecology found that the average density of zooplankton in a pond w ...continues

Calculate 95% and 99% confidence intervals for the mean selling price of vehicles sold by Winter Pontiac. Test the hypothesis that the mean selling price of automobiles sold by Winter Pontiac is less than $25,000. Use alpha= .05

1)      Calculate 95% and 99% confidence intervals for the means selling price of Vehicles sold by Winter Pontiac. 2)      Test the hypothesis that the mean selling price of automobiles sold by Winter Pontiac is less than $25,000. Use alpha= .05 To solve the problem 1 and 2 below use the following table $20,197 ...continues

Statistic problem

2 Questions: 3) Using the CIELO data, calculate 95% and 99% confidence intervals for the percentage intending to purchase the CIELO. (see attachment for full question) -------------------------------------------------- 3) Using the CIELO data, calculate 95% and 99% confidence intervals for the Percentage intending to purcha ...continues

Statistic problem

Test the hypothesis that there is no difference in the age of the death for the United States Presidents and Vice Presidents. (see attachment for full question)

Statistics

Because of a recent incident in which a number of people became ill after eating undercooked hamburger meat, intensive interest has centered around the cooking time for hamburger patties. In the past, the cooking time at a local fast food firm has been found to be uniformly distributed between 4 and 5 minutes. a) A TV report ...continues

Statistics problem

1) A survey revealed that 21.5% of the households had no checking account, 66.9% had regular checking accounts, and 11.6% had NOW accounts. Of those households with no checking account 40% had savings accounts. Of the households with regular checking accounts 71.6% had a savings account. Of the households with NOW accounts 7 ...continues

Statistics: normally and binomially distributed random variables

1) A videotape store has an average weekly gross of $1,158 with a standard deviation of $120. Assuming this to be a normally distributed random variable, calculate the following: a. Probability the weekly gross will exceed $1,261. b. Proportion of weeks the weekly gross is less than $1,080. c. Probability the weekly gross is ...continues

Statistics

12) The physical science degrees conferred by a school between 1992 and 1995 were broken down as follows: Major Male Female Totals Physics 25 25 50 Chemistry 60 40 100 Geology 30 20 50 Totals 115 85 200 Suppose a person is selected at random f ...continues

Word Problem

At the time she was hired as a server at a restaurant, Beth was told she could average more than $20.00 a day in tips. Over the first 35 days she was employed, the mean daily amount of her tips was $24.85, with a standard deviation of $3.24. At the .01 significance level, can Beth conclude that she is earning an average of more ...continues