Help please
Help please
I have the following problem and can't figure it out. A mileage test is conducted for a new car model, the “Pizzazz.” Thirty random selected Pizzazzes are driven for a month and the...
Not sure how to do probability problems so I need help with them!
The probability that sue will live on campus and buy a new car is 0.34. If the probability that she will live on campus is 0.53, find the probability that she will buy a new car, given that she lives...
In a recent survey, 15 people preferred milk, 27 people preferred coffee and 18 peoplepreferred juice as their primary drink for breakfast. If a person is selected at random, find theprobability that...
Please consider the following statement: “If the decision is to reject a null hypothesis, then we have certainty that the null hypothesis is false.” Please indicate whether this statement is true...
Four red cards and four green cards are well shuffled. Cards are drawn, without replacement, until the color of a card drawn matches the color of the first card drawn. Find the average number of cards...
Per capita consumption of Spam in the US is Normally distributed with a mean of 2.3 pounds and a standard deviation of 0.9 pounds. Random sample of 20 people are chosen. Use the Central Limit Theorem...
There were 50 students in session 1 of a STA 13 class last year (the total # of students was 519). In the final exam, the average score in session 1 was 56.3 and the standard deviation was 13.8. Construct...
A random variable x has a normal distribution in the 50th percentile for x is 5. What is the mean of x?
Let z be a standard normal random variable. Find P(0.48 < z < 2.3 and z > 1.9). I tried to do them both separately and then putting them together but I ended up with the wrong...
Five percent (0.05) of the parts produced by a machine are defective. Twenty parts are selected at random for study. A. what is the probability that 3 or fewer parts are defective? B...
A poll taken just prior today finds that 389 of 700 registered voters intend to vote for Jake Anderson for mayor. We want to test Ho: q=0.5 where q represents the proportion of all voters who intend...
It happens that a graduate student in theoretical/mathematical physics is looking for five members of his dissertation committee. He has been working closely with three professors in the mathematics...
The opera house has 2000 seats. there are 1200 seats on the main floor and 800 in the balcony. 40% of those in the balcony buy a program while 50% of people on the main floor buy a program. on opening...
A psychologist wishes to estimate the mean IQ of students at one college. He picks a random sample of 49 students from the college, measures each student's IQ, and obtains the following 95% confidence...
A student wished to use a table of areas for the standard normal curve to find the z-score having an area to its right of 0.52. The student started by looking for the closest area to 0.52 in the body...
a. seven groups are being compared with 5 observations per group. the value of the f statistic is 2.69 b. five groups are being compared with 11 observations per group. the value for the...
Scores on a particular intelligence test are essentially normal with mean of 100 and standard deviation of 20. I have a statistics final today and im lost on how to solve this. I need a step by step...
does more data points improve your chances of finding a statistically significant difference