Thursday

May 5, 2016
Number of results: 20

**statitics**

Explain why this is or is not a probability distribution. x 1 2 3 4 P(x) 0.4 0.3 0.4 -0.1 Please I do not understand!!
*February 12, 2015 by slomo*

**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
*October 17, 2010 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
*October 17, 2010 by Anonymous*

**statitics**

find the probility that when 4 managers are randomly selected from a group of 20, the 4 oldest are selected
*February 11, 2010 by rose *

**Statitics**

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

**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)
*October 17, 2010 by Anonymous*

**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
*December 6, 2013 by jame*

**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...
*March 8, 2014 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
*March 27, 2012 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
*March 27, 2012 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
*April 18, 2011 by jamie*

**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 ...
*April 15, 2011 by Bella*

**statitics**

Certain data includes 36 body temperatures for which the sample mean is equal to 98.20 °F and standard deviation of 0.62 °F. Using this sample statistics, construct a 95% confidence interval of the mean body temperature. What does the sample suggest about the use of 98.6°F as ...
*May 19, 2014 by statitics*

**business statitics**

a) The mean lifetime of a sample of 100 light tubes produced by a company is found to be 1570 hours with standard deviation of 80 hours. Test the hypothesis that the mean lifetime of the tubes produced by the company is 1600 hrs. (7 marks)
*October 27, 2015 by john*

**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 ...
*October 10, 2010 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 ...
*October 17, 2010 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 ...
*October 17, 2010 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 ...
*October 17, 2010 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, ...
*April 15, 2013 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. ...
*August 20, 2011 by ann*

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