Stats Help for College-level Students

Statistics

Hypothesis testing

Formula

I already received a response on my question, but I don't understand which formula to use still. Attached is a copy of the problem. Do I use formula A,B, or C. A. (Ey)(Ex2)-(Ex)(Exy) / n(Ex2) - (Ex2) B. n(Exy) - (Ex)(Ey) / square root of n(Ex2) - (Ex)2 C. r= n(Exy) - (Ex)(Ey) / sq. root of [n(Ex2) - (Ex)2][n(Ey2) ...continues

Descriptive methods: regression and correlation

Descriptive methods: regression and correlation

Descriptive methods in regression and correlation

Descriptive methods in regression and correlation

Various Beginner Statistics (NS391)

There are 12 statistics problems that I need help with. They can be found in attachment 2.

Binomial Probability Problem

If 90% of the U.S. citizens feel that the President is doing a satisfactory job,what is the probability that if 12 citizens are asked if the president is doing a satisfactory job that at least 9 will say yes?

Calculating a person's expectation at winning a lottery.

If 5,000 tickets are sold for $3 each and there will be one prize worth $5,000, a second prize worth $1,000 and a third prize worth $500, find one's expectation to win if they buy a ticket.

Statistics- Probability

A recent Survey indicated that 18% of America adults were in favor of cloning human embryos. What is the probability that in a group of 30 adult Americans, three or four will be in favor of cloning human embryos? Show your work.

Statistics problem

The director of emergency medicine at NYU hospital is studying patient waiting times. "waiting time" is defined as the time from when a patient enters the facility until he or she is seen by a physician. The study indicates that waiting time follows a normal distribution with a mean of 22 minutes and a standard deviation of 8 mi ...continues

Statistics

The director of emergency medicine at NYU hospital is studying patient waiting times. "waiting time" is defined as the time from when a patient enters the facility until he or she is seen by a physician. The study indicates that waiting time follows a normal distribution with a mean of 22 minutes and a standard deviation of 8 mi ...continues