Stats Help for College-level Students

Statistics

ANOVA table and hypothesis testing

Statistics

Test statistics

regression analysis

regression analysis

regression analysis

regression analysis

Statistics: confidence interval and decision making

1. Tourism is one consideration for CoffeeTime's future. A survey of 1,233 visitors to Mumbai last year revealed that 110 visited a small café. Use a 0.05 significance level to test her claim. Would it be wise for her to use that claim in trying to convince management to increase their advertising spending to travel agents? ...continues

Inference for distributions

a). Find the mean IQ scores for girls and for boys. It is common for boys to have somewhat higher scores on standardized tests. It that true? b). Compute 95% T intervals of the Girls' IQ's and the Boys' IQ's and explain what these intervals mean. c). Make a histogram for each set of data to determine whether each distribu ...continues

ANOVA question

I have a question about two-way ANOVA. Here is my experiment. There are two groups of sucjects A(n=50) and B(n=60). Each subjects has to test five different concentrations of a solution (5%,10%, 20%, 40%, 80%). When a subject tastes a solution, he gives it a score how he likes it (from 1 to 10). I need to analyze how the rat ...continues

Statistics

Expected value, confidence interval and significance level calculation.

Statistics

The data in the table that follows was collected by a large car manufacturer concerning a new prototype car called the CIELO. Thirty carefully selected respondents were shown the car and fully briefed about its capabilities. Here is the data, which includes age (intervally scaled), sex (nominal), social status (interval scale ra ...continues

Probability

1.) If you buy a box of Wisk, the probability of getting a scoop is 97%. If you buy 9 boxes over the next several months, what is the probability of missing two scoops? 2.) The average length of a cellular phone call in the US is 3.4 minutes. If the standard deviation of those calls is .07 minutes (population standard deviati ...continues