Statistics and Probability Answers

20. A new car salesperson knows that she sells a car to one customer out of 20 who enter the showroom.
Find the probability that she'll sell a car to exactly two of the next three customers.
A. 0.9939
B. 0.0075
C. 0.0071
D. 0.1354

south african captain lost th etoss of a coin 13 times out of 14 . the chance of this happening is?

60 people went to a cash resister at a deperatment store. 10 had blonde hair, 17 had black hair, 25 had brown hair and 8 had red hair. determine the probability that the next person to go to the register has red hair

A researcher hypothesizes that people who listen to music via headphones have greater hearing loss and will thus score lower on a hearing test than those in the general population. On a standard hearing test, the overall mean for the general population is 22.5. The researcher gives this same test to a random sample of 12 individuals who regularly use headphones. Their scores on the test are 15, 14, 20, 20, 25, 22, 21, 19, 16, 17, 21, 22.

What are the exact differences between exponential and negative exponential distribution?

give me an exampe to perform levene's test. i have school project that make an app for QUEST algorithm. after do chi square or anova f test, sometimes i have to do levene's test. if you don't mind help me with an example

A registered golden retriever has a litter of 11 puppies. Assume that the probability of a puppy being male is .5
1. Because the owner of the dof can expect to get more money for a male puppy, what is the most likely number of males in the litter?
2. What is the probability at least 7 of the puppies will be male?

what is the 90% confidence interval for a population of 482, means of 164 standard deviation of 33

There is a fruit ball with 6 bananas ,5 oranges and 4 apples.If you select one fruit at a time, what is the probability that the the first two fruits are bananas??

suppose 51% of the banks in switzerland are private organization. If a sample of 430 banks is selected, what is the probability that the sample proportion of private banks will be less then 52%