Sunday

April 20, 2014

April 20, 2014

Number of results: 22

**statitics**

Evaluate these binomial probabilities a. C82 (.2)2 (.8)6 b. C81 (.2)1 (.8)7 c. C80 (.2)0 (.8)8 d. P(X ≤ 1), when n = 8, p = 0.2
*Sunday, October 17, 2010 at 5:35pm by Anonymous*

**statitics**

Find the mean and standard deviation for a binomial distribution with these values: a. n = 1000, p = 0.3 b. n = 400, p = 0.01 c. n = 500, p = 0.5
*Sunday, October 17, 2010 at 5:36pm by Anonymous*

**statitics**

find the probility that when 4 managers are randomly selected from a group of 20, the 4 oldest are selected
*Thursday, February 11, 2010 at 5:03pm by rose *

**statitics**

Let X be a Poisson random variable with mean µ = 2.5. Use Table 2 in Appendix I to calculate these probabilities: a. P (X ≥ 5) b. P(X < 6) c. P(X = 2) d. P(1 ≤ X ≤ 4)
*Sunday, October 17, 2010 at 5:37pm by Anonymous*

**Statitics**

25 periodicals have a mean of $180 and a standard deviation of $12. form a 95% confidence interval on the population mean.
*Friday, March 20, 2009 at 5:25pm by Sally*

**Statitics**

How to find mean, standard devation , confedince interval 95%, t= test , pvaule and do a hypo test using data? Short 25 Average 5 No Preference. 10
*Friday, December 6, 2013 at 11:27am by jame*

**statitics**

The number of quartets from the 20 is C(20,4) = 20!/(16!4!) = 4845 The "4 oldest" would be one of those groups of 4. so prob = 1/4845
*Thursday, February 11, 2010 at 5:03pm by Reiny*

**Statitics**

95% confidence interval is the mean ± 2 standard error of the mean (SE). SE = SD/√n √ = square root You can do the calculations. I hope this helps. Thanks for asking.
*Friday, March 20, 2009 at 5:25pm by PsyDAG*

**Statitics**

A Department of Transportation report about air travel that 5 out of every 1000 pieces of luggage are lost by the airlines. You are traveling with a group of people who have 22 pieces of luggage. What is the probability that 2 of these are lost? Set up the equation and plug in...
*Saturday, March 8, 2014 at 8:19am by Brenda*

**statitics**

Suppose that a sample of n = 1,600 tires of the same type are obtained at random from an ongoing production process in which 8% of all such tires produced are defective. What is the probability that in such a sample 150 or fewer tires will be defective
*Tuesday, March 27, 2012 at 6:45pm by Chris*

**statitics**

Suppose that a sample of n = 1,600 tires of the same type are obtained at random from an ongoing production process in which 8% of all such tires produced are defective. What is the probability that in such a sample 150 or fewer tires will be defective
*Tuesday, March 27, 2012 at 7:51pm by Chris*

**statitics**

a light bulb manufacture gaurentees that the mean life of a certain type of bulb is at least 875 hours. A random sample of 40 light bulbs has a mean life of 863 hours with a standard deviation of 50. a=0.04
*Monday, April 18, 2011 at 1:09am by jamie*

**Finance**

Accounting do all the accounting activites,accounting records thru the accounting standerds and organization polices. financial management start using the data to analze and study the results,compering it with the statitics reports,financial indicator, performance reports and ...
*Sunday, October 31, 2010 at 8:10pm by salim bakr*

**Statitics**

prob(lost) = 5/1000 = 1/200 prob(not lost) = 199/200 prob( 2 of 22 are lost) = C(22,2) (1/200)^2 (199/200)^20 = .005224.. Question for you. would this be the same as "....a group of people who have 11 pieces of luggage. What is the probability that 1 of these are lost? "
*Saturday, March 8, 2014 at 8:19am by Reiny*

**statitics**

Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores. d. For distribution of mean rather than scores, use SEm instead of SD. SEm = SD/√(n-1) Then use ...
*Saturday, August 20, 2011 at 7:28pm by PsyDAG*

**Statitics**

The value given below is discrete. use the continuity correction and describe the region of the normal distribution that corresponds to the indicated probiality. The probability of fewer than 35 men are senators who are men a)the area to the left of 35.5 b)the area to the ...
*Friday, April 15, 2011 at 4:22pm by Bella*

**statitics**

17. Do students at various universities differ in how sociable they are? Twenty-five students were randomly selected from each of three universities in a region and were asked to report on the amount of time they spent socializing each day with other students. The result for ...
*Sunday, October 10, 2010 at 8:12pm by Anonymous*

**statitics**

Intensive Care. The number X of people entering the intensive care unit at a particular hospital on any one day has a Poisson probability distribution with mean equal to five persons per day. a. What is the probability that the number of people enterin the intensive care unit ...
*Sunday, October 17, 2010 at 5:37pm by Anonymous*

**statitics**

Approximately 40% of all U.S. households own at least one dog (according to the humane society). Suppose 15 households are randomly selected for a pet ownership survey. a. What is the probability that exactly eight of the households have at least one dog? b. What is the ...
*Sunday, October 17, 2010 at 5:36pm by Anonymous*

**statitics**

E. Coli outbreak. Outbreaks of E. coli have occurred at a rate of 2.5 per 100,000. Assume this rate represents the mean for the number of outbreaks (as a Poisson random variable). a. What is the probability that at most five cases of E. coli per 100,000 are reported in ...
*Sunday, October 17, 2010 at 5:38pm by Anonymous*

**math statitics**

The makers of the MAGNETIZER Engine Energizer System (EES) claim that it improves gas mileage and reduces emissions in automobiles by using magnetic free energy to increase the amount of oxygen in the fuel for greater combustion efficiency. Following are test results, ...
*Monday, April 15, 2013 at 3:08pm by Tyra *

**statitics**

Assume the body temperatures of healthy adults are normally distributed with a mean of 98.20 °F and a standard deviation of 0.62 °F (based on data from the University of Maryland researchers). a. If you have a body temperature of 99.00 °F, what is your percentile score? b. ...
*Saturday, August 20, 2011 at 7:28pm by ann*

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