math/statistics

Most popular questions
1. math/statistics

In the Numbers Game, a state lottery, four numbers are drawn with replacement from an urn containing balls numbered 0-9, inclusive. Find the probability that a ticket holder has the indicated winning ticket. The first three digits in exact order.

asked by Brian on June 19, 2017
2. math/statistics

From a shipment of 65 transistors, 4 of which are defective, a sample of 6 transistors is selected at random. (a) In how many different ways can the sample be selected? ways (b) How many samples contain exactly 3 defective transistors? 166320 samples (c)

asked by Rahat on June 25, 2017
3. Math/statistics

a recent study indicated that 29% of the 100 women over age 55 in the study were widows. a. How large a sample must you take to be 90% confident that the estimate is within 0.05 of the true proportion of women over age 55 who are widows? b. If no estimate

asked by Tessa on November 23, 2012
4. math/statistics

In a survey of 200 employees of a company regarding their 401(k) investments, the following data were obtained. 150 had investments in stock funds. 78 had investments in bond funds. 60 had investments in money market funds. 46 had investments in stock

asked by Brian on June 19, 2017
5. math/statistics

The data show the time intervals after an eruption (to the next eruption) of a certain geyser. Find the regression equation,letting the first variable be the independent (x) variable. Find the best predicated time of the interval after an eruption given

asked by slomomo on March 6, 2015
6. Math/Statistics

The mean starting salary for graduates in the spring of 2004 was \$36,280. Assume that the distribution of starting salaries follows the normal distribution with a standard deviation of \$3,300. What percent of the graduates have starting salaries between

asked by Dave on November 29, 2010
7. Math/Statistics

The number of megapixels in a digital camera is one of the most important factors in determining picture quality. But, do digital cameras with more megapixels cost more? The following data show the number of megapixels and the price (\$) for 10 digital

asked by ANAHI on November 6, 2014
8. Math/Statistics

A statistics teacher believes that the final exam grade for her elementary stats class have a normal distribution with a mean of 82 and a standard deviation on 8. Find the score which separates the top 10% of the scores from the lowest 90% of the scores.

asked by Sean on August 11, 2013
9. Math/Statistics

Three hundred twelve viewers were asked if they were satisfied with TV coverage of a recent disaster. Gender Female Male Satisfied 90 53 Not Satisfied 124 45 (a) Find P(satisfied). (Give your answer correct to two decimal places.) (b) Find P(satisfied |

asked by Nora on May 29, 2013
10. Math/Statistics

A and B are events defined on a sample space, with the given probabilities. Find P(A and B). (Give your answer correct to two decimal places.) P(A | B) = 0.43 and P(B) = 0.75

asked by Nora on May 29, 2013
11. Math/statistics

Thirty five percent of adult americans are regular voters. A random sample of 250 adults in a medium size college town were surveyed, and it was found that 110 were regular voters. Estimate the true proportion of regular voters with 90% confidence and

asked by Tessa on November 23, 2012
12. Math/Statistics

Suppose that A and B are events defined on a common sample space and that the following probabilities are known. Find P(A or B). (Give your answer correct to two decimal places.) P(A) = 0.32, P(B) = 0.36, P(A | B) = 0.24

asked by Nora on May 28, 2013
13. Math/Statistics

STATISTICS PLEASE HELP!!!!! I am sorry this is jy second time posting, but I really need help. I have tried contacting my teacher and classmates with no luck. Please just steer me in the right direction!: Suppose cars arrive at Burger King's drive-through

asked by Jake on October 22, 2011
14. math/statistics

In a manufacturing plant, three machines, A, B, and C, produce 37%, 36%, and 27%, respectively, of the total production. The company's quality-control department has determined that 1.5% of the items produced by Machine A, 2% of the items produced by

asked by Rahat on June 25, 2017
15. Math/Statistics

A group of 10 students have average of GPA of 2.8 with SD of 0.3. Does this group present enough evidence to indicate that the average GPA is less than 3.0? Make your decision at a 5% level of significance.

asked by Anonymous on July 7, 2014
16. Math/Statistics

Consider the following. P(A) = 0.27 and P(B) = 0.36, A and B are mutually exclusive events (a) Find the probability P(A). (Give your answer correct to two decimal places.) (b) Find the probability P(B). (Give your answer correct to two decimal places.) (c)

asked by Nora on May 28, 2013
17. Math/Statistics

A simple dartboard has three areas…the main board has a radius of 8 inches, there is a circle with a radius of 6 inches, and the bullseye has a radius of 4 inches. What is the probability of a random dart landing inside the bullseye?

asked by Rodney on May 1, 2011
18. math/statistics

Could anyone explaint to me what role the Binomial Theory plays in statistics and probability? Using statistics, we can make statements about a population based on sample data. Probability helps us make those statements. The binomial theory can be used to

asked by Jennie on March 6, 2007
19. math/statistics

In a past presidential election, it was estimated that the probability that the Republican candidate would be elected was 1/3, and therefore the probability that the Democratic candidate would be elected was 2/3 (the two Independent candidates were given

asked by Rahat on June 25, 2017
20. Math/Statistics

Suppose that A and B are events defined on a common sample space and that the following probabilities are known. Find P(A or B). (Give your answer correct to two decimal places.) P(A) = 0.32, P(B) = 0.36, P(A | B) = 0.24

asked by Nora on May 29, 2013
21. Math/Statistics

If the odds of winning a raffle are 13:225, what is the probability of winning?

asked by Rodney on May 1, 2011
22. math/statistics

In a survey of 400 individual investors regarding subscriptions to the New York Times (NYT), Wall Street Journal (WSJ), and USA Today (UST), the following data were obtained. 120 subscribe to the NYT. 146 subscribe to the WSJ. 68 subscribe to the UST. 36

asked by Brian on June 16, 2017
23. Math/Statistics

Consider the following. P(A) = 0.27 and P(B) = 0.36, A and B are mutually exclusive events (a) Find the probability P(A). (Give your answer correct to two decimal places.) (b) Find the probability P(B). (Give your answer correct to two decimal places.) (c)

asked by Nora on May 29, 2013
24. Math/Statistics

Consider the following. P(A) = 0.31 and P(B) = 0.41, and P(A and B) = 0.1271 (a) What is P(A | B)? (Give your answer correct to two decimal places.) (b) What is P(B | A)? (Give your answer correct to two decimal places.) (c) Are A and B independent? yes no

asked by Nora on May 28, 2013
25. Math/Statistics

Of 29 college juniors at State University, 13 preferred pepperoni pizza, 11 preferred supreme, and 5 preferred cheese. If we picked a college junior at State University at random, what is the probability that he or she would prefer cheese?

asked by Rodney on May 1, 2011
26. Math/Statistics

I don't get how to do this...can anyone help? 1. In a large box are 20 ping-pong balls—10 of them are red and numbered 1 through 10, and the other 10 of them are green and also numbered 1 through 10. Two balls are selected from the box without

asked by John on September 27, 2009
27. Math/Statistics

Last fall, a gardener planted 68 iris bulbs. She found that only 58 of the bulbs bloomed in the spring. Find the empirical probability that an iris bulb of this type will bloom. How many of the bulbs should she plant next fall if she would like at least 60

asked by Rodney on May 1, 2011
28. math/statistics

Evaluate the quantity. 3 · P(6, 4) · C(8, 5)

asked by Rahat on June 25, 2017
29. Math/Statistics

Consider the following. P(A) = 0.31 and P(B) = 0.41, and P(A and B) = 0.1271 (a) What is P(A | B)? (Give your answer correct to two decimal places.) (b) What is P(B | A)? (Give your answer correct to two decimal places.) (c) Are A and B independent? yes no

asked by Nora on May 29, 2013
30. Math/Statistics

Can anyone please help me explain confidence intervals. How does one tell/determine if a confidence interval is too wide? What indicates too wide? Thanks in advance!

asked by Rory on October 2, 2012
31. Math/Statistics

If the probability of seeing a moose in a day in a certain region of Alaska is 0.54, what is the probability of not seeing a moose in a day there?

asked by Rodney on May 1, 2011
32. Math/Statistics

According to the U.S. census bureau, the total 2008 U.S. population was 303,824,640. The chart below summarizes the 2008 population for five U.S. States: Missouri 5,911,605 Pennsylvania 12,448,279 Tennessee 6,214,888 Utah 2,736,424 Washington 6,549,224

asked by Rodney on May 1, 2011
33. Math/Statistics

A certain drawing states that the odds of winning are 15:270. What would be the odds against winning?

asked by Rodney on May 1, 2011
34. Math/Statistics

The property restoration company PuroServ is considering switching to new dehumidifiers. Their market research, considering the cost of the new machines and their efficiency, tells them that the switch would give them an 83 percent chance of making a

asked by Rodney on May 1, 2011
35. Math/Statistics

A community 5K run will award \$50 to the winner. 50 people enter the race, and they each pay an entry fee of \$20.00. Assuming they are all equally likely to win , what is a fair price for the competition?

asked by Rodney on May 1, 2011
36. Math/Statistics

does anyone know anyting about standard deviation... I have no idea what it is! http://en.wikipedia.org/wiki/Standard_deviation http://www.robertniles.com/stats/stdev.shtml

asked by Kaz on August 5, 2007