970 Answered Questions for the topic Statistics Question

Statistics Question

07/28/15

Find the percentile for the data value. Data set: 55, 38, 30, 66, 67, 68, 44data value: 55
Find the percentile for the data value. Data set: 55, 38, 30, 66, 67, 68, 44data value: 55  
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Statistics Question

07/28/15

Conclusion for following claim
Claim: p = 0.34, P-value = 0.014, and α (alpha) = 0.05.
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Statistics Question

07/27/15

Population mean
The computed test statistic (rounded to two decimal places) for a claim about a population mean given "x - bar" = 143, "mu" = 150, "lowercase sigma" = 5.6, and n = 10, assuming a normal population.
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Statistics Question

07/21/15

find the probability
the amount of milk produced each day by  a herd of cows is uniformly distributed between 44.6 gallons and 58.8 gallons. find the probability that the amount of milk produced is between 45.9 gallons... more
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Statistics Question

07/20/15

normal distribution to approximate a binomial distribution.
normal distribution to approximate a binomial distribution.2,881 adults were selected for a survey. if the probability, p, of a response to the survey is 71.85% what would be the probability that... more
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Statistics Question

07/17/15

Find the indicated area under the standard normal curve. Between z=-1.35 and z=1.35.
I need to know how to do it step by step so that I can do the other problems.
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Statistics Question

07/12/15

Statistics question
The furniture is produced on a weekly basis and stored in the warehouse until the end of the week, whenit is shipped out. The warehouse has a total capacity of 650 pieces of furniture. Each sofa... more
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Statistics Question

07/06/15

A bag contains 4 red marbles, 3 blue marbles, and 5 green marbles.if a marbles is randomly selected from the bag, what is the probability that it is blue?
Help please  
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Statistics Question Probability & Statistics

06/30/15

please help!
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... more
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Statistics Question

06/30/15

Please help!!!
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... more
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Statistics Question

06/30/15

A box contains 24 syringes, 4 of which are defective. If 4 are used, then what is the probability that at least one syringe is defective?
Not sure how to do probability problems so I need help with them!
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Statistics Question

06/13/15

type I & Type II Erros
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... more
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06/12/15

Probability, Random Variables
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... more
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Statistics Question

06/09/15

central limit theorem
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... more
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Statistics Question Statistics

06/06/15

Construct a 95% Confidence Interval
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.... more
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06/06/15

Percentile Question!!
A random variable x has a normal distribution in the 50th percentile for x is 5. What is the mean of x?
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06/06/15

Finding Probabilities
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 answer.... more
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Statistics Question

06/06/15

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
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. what is the... more
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Statistics Question Statistics Proportion

06/05/15

P-Value of of Propotion
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... more
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Statistics Question

06/03/15

combination or permutation
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... more
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Statistics Question

05/16/15

In order to estimate the mean amount of time computer users spend on the internet each month...
In order to estimate the mean amount of time computer users spend on the internet each month, how many computer users must be surveyed in order to be 90% confident that your sample mean is within... more
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Statistics Question Math Statistics Math Help

05/13/15

Quick statistic question... I really don't understand. Thanks!!
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... more
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Statistics Question Statistics

05/09/15

Providing an appropriate response
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%... more
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Statistics Question

05/09/15

Providing an appropriate response
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... more
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Statistics Question

05/08/15

Statistics Help! Urgent!
Suppose that 16% of the population of the U.S. is left-handed. If a random sample of 130 people from the U.S. is chosen, approximate the probability that at least 20 are left-handed. Use the normal... more
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