b)
2 standard deviation from mean values are μ -/+ 2*σ=(0.95,8.05) |
P(2 standard deviation away from mean)=P(X=0)+P(X>=9) =0.020
(please try 0.015 if this comes wrong)
c)
P(5<=X<=10)= | ∑x=ab (nCx)px(1−p)(n-x) = | 0.484 |
d)
expected total revenue =4.5*110+(15-4.5)*80 =1335
Suppose that 30% of all students who have to buy a text for a particular course...
Suppose that 30% of all students who have to buy a text for a particular course want a new copy (the successes!), whereas the other 70% want a used copy. Consider randomly selecting 15 purchasers. (a) What are the mean value and standard deviation of the number who want a new copy of the book? (Round your standard deviation to two decimal places.) mean studentsstandard deviation students (b) What is the probability that the number who want new copies is more...
Suppose that 30% of all students who have to buy a text for a particular course want a new copy (the successes!), whereas the other 70% want a used copy. Consider randomly selecting 15 purchasers. (a) What are the mean value and standard deviation of the number who want a new copy of the book? (b) What is the probability that the number who want new copies is more than two standard deviations away from the mean value? (c) The...
[-/21 Points) DETAILS DEVORESTATO 3.6.052.NVA Suppose that 30% of all students who have to buy a text for a particular course want a new copy (the successes!), whereas the other 70% water.com 15 purchasers (a) What are the mean value and standard deviation of the number who want a new copy of the book? (Round your standard deviation to two decimal places) mean students standard deviation students (b) What is the probability that the number who want new copies is...
1. + -/21 points DevoreStat9 3.E.052. y Notes Suppose that 30% of all students who have to buy a text for a particular course want a new copy (the successes!), whereas the other 70% want a used copy. Consider randomly selecting 15 purchasers. (a) What are the mean value and standard deviation of the number who want a new copy of the book? (Round your standard deviation to two decimal places.) mean students standard deviation students (b) What is the...
be accurate please and thanks. Suppose that 30% of all students who have to buy a text for a particular course want a new copy (the 25 purchaser whereas the other of the book found your da (a) what are the mean value and standard deviation of the number who wants mean students standard deviation students t a ) (b) What is the probability that the number who want new copies is more than two standard deviations away from the...
Suppose that 30% of all students who have to buy a text for a particular course want a new copy (the successes!), whereas the other 70% want a used copy. Consider randomly selecting 15 purchasers.(a) What are the mean value and standard deviation of the number who want a new copy of the book?(b) What is the probability that the number who want new copies is more than two standard deviations away from the mean value?(c) The bookstore has 10...
Suppose that 30% of all students who have to buy a text for a particular course want a new copy (the successes!), whereas the other 70% want a used copy. Consider randomly selecting 25purchasers.A) What are the mean value and standard deviation of the number who want a new copy of the book?b) what is the probability that the number who want new copies is more than two standard deviations away from the mean value?c) The bookstore has 15 new...
A selective college would like to have an entering class of 1000 students. Because not all students who are offered admission accept, the college admits more than 1000 students. Past experience shows that about 83% of the students admitted will accept. The college decides to admit 1200 students. Assuming that students make their decisions independently, the number who accept has the B(1200, 0.83) distribution. If this number is less than 1000, the college will admit students from its waiting list....
In a sample of 20 students enrolled in a hybrid course one that contains both online and classroom instruction), the mean number of hours it took students to meet the online course objectives was 53.7 with a standard deviation of 12.1. a.) What is the best point estimate of the mean number of hours it takes students to meet online course objectives? b.) How many degrees of freedom will be used for the given sample size? c.) What is the...
Suppose you are in the market for a used text book and the campus bookstore is having a sale. If the initial price of the used text is $77 and the discounted price is $59, what is the percentage change in the book price? Round your answer to two places after the decimal (for example, 12.48). NOTE: A percentage is a fraction out of 100-for example, 7% 7/100. The instructions to "round your answer to two places after the decimal"...