1,006 Answered Questions for the topic Statistics Question

Statistics Question Statistics Probability Statistic

06/15/16

Probability question: Chances of winning
A contest will award 100 winners with a voucher each. There are 300 participants. Elly joined the contest 3 times, but entering using her details, her sister's details, and her mother's details.... more
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Statistics Question

06/13/16

Mutually Exclusive or not? Speaking Spanish and speaking Chinese
No other info
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Statistics Question

06/12/16

which of the following is the correct decision for a two-tailed hypothesis test?
An independent-measures research study uses two samples, each with n=12 participants. If the data produces a t statistic of t=2.08, then which of the following is the correct decision for a... more
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06/11/16

The random variable X has pdf given by f(x)=(1+x),-1<x=0 and f(x)=(1-x),0<x<1
The random variable X has pdf given by  f(x)=(1+x),-1<x≤0 and f(x)=(1-x),0<x<1   a)Find F(x) and sketch its graph?   my solution: F(X)=(x^2/2)+x+1/2 , -1<x≤0 and F(x)=x-(x^2/2)... more
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Statistics Question

06/09/16

I play a game 6 times and I have a 7% chance of winning, what is the probability that I win exactly two games?
Statistics class. Three students play a game 6 times. The probability of winning a single game for Jimmy is 7%, for Robert 6%, and for Tommy 87%. Assuming the outcomes of the 6 games are... more
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Statistics Question

06/07/16

Find the standard error of the mean when the population standard deviation is 2.4 and a sample of size 36 is taken.
Find the standard error of the mean when the population standard deviation is 2.4 and a sample of size 36 is taken.
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Statistics Question Math Algebra 2

06/06/16

Find the probability of exactly four successes in five trials of a binomial experiment in which the probability of success is 40%.
Find the probability of exactly four successes in five trials of a binomial experiment in which the probability of success is 40%. Round to the nearest tenth of a percent.
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Statistics Question

06/06/16

A country music fan plans to make a CD of 11 of 26 of her favorite songs. How many different combinations of 11 songs are possible? and is this practical?
Statistics
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Statistics Question

06/05/16

The mean is 125 and a standard deviation of 10. Use the table to find the percentage of people with readings between 116116 and 134134.
The results of a certain medical test are normally distributed with a mean of 125 and a standard deviation of 10. Use the table to find the percentage of people with readings between 116 and 134.
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Statistics Question

06/02/16

Americans 18 and older, 20% are divorced. If 10 Americans aged 18 or older are randomly selected, find the probability that at least 2 of them are divorced.
can someone please show me how to do this
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Statistics Question

05/30/16

statistics question
Let Z be the standard normal random variable. Calculate the following and draw a picture illustrating each probability. (i) P(Z < 1.8) = (ii) P(Z > -1.2) = (iii) Find c such that P(Z >... more
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Statistics Question Statistics Probability Stats

05/18/16

Let P(A)=P(B)=0.42 and P(AnB)=0.13 Find P(A'?B')
Let P(A)=P(B)=0.42 and P(A∩B)=0.13   Find P(A'∪B')   solution   P(A'∪B')=P(A)+P(B)-P(A∩B)              =0.42+0.42-0.13=0.71   Is it correct?
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Statistics Question Statistics Algebra High School: Math

05/16/16

Help!!!!!!
in a distribution, the number 11 has a z-score of -1 and a standard deviation of 3. what is the value of the data with a z-score of 2?
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Statistics Question Probability Distribution

05/14/16

Statistics Homework Help Needed
Determine whether a probability distribution is given. If a probability distribution is given, find its mean and standard deviation. If a probability distribution is not given, identify the... more
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Statistics Question Statistics

05/13/16

Statstics: Find the Range, Variance, and Standard Deviation
Use the listed IQ Scores:    IQ: 96 89 87 87 101 103 103 96 127 126 101 96 93 88 94 85 97 114 113 124
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Statistics Question

05/12/16

Suppose a population has a mean of 84 and a standard deviation of 18. If a researcher randomly samples 37
population has a mean of 84 and a standard deviation of 18. If a researcher randomly samples 37 values from this population, the probability that 80 < ¯X< 89 is
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Statistics Question

05/11/16

Use technology to construct a 90?% confidence interval estimate of the mean amount of mercury in the population.
Listed below are the amounts of mercury? (in parts per? million, or? ppm) found in tuna sushi sampled at different stores. The sample mean is 0.941 ppm and the sample standard deviation is 0.377... more
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Statistics Question

05/09/16

X^2/30, for X = 1,2,3,4
Find the variance and standard deviation of the probability distribution X^2/30, for X = 1,2,3,4
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Statistics Question Statistics Word Problem Stats

05/05/16

Please help with a statistics question.
THE MEAN TOTAL CHOLESTEROL FOR A POPULATION OF MEN BETWEEN THE AGES OF 20 AND 29 IS180 MICROGRAMS PER DECILITER WITH A STANDARD DEVIATION OF 34.8. A HEALTHY TOTALCHOLESTEROL LEVEL IS LESS THAN 200,... more
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Statistics Question Statistical Tests

05/05/16

i need help with my statistics final
i need to know what type of test to use for the following questions1) Does Mark’s yards relate to the temperature during the start of the game?2) Does Mark’s year in college impact the amount of... more
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Statistics Question

05/05/16

statistic word problem
on the first semester there was 199 referrals and of those referrals there were 31 students with 3 or more referrals on the second semester year was 116 referrals and of those referrals there was... more
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Statistics Question

05/05/16

STATISTICS
The table summarizes results from 978 pedestrian deaths that were caused by automobile accidents.   Drivers Intoxicated-------Pedestrian... more
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Statistics Question

05/03/16

statistics
To gather data on a 1200 - acre pine forest in North Dakota, the U.S Forest Service laid a grid of 1410 equally spaced circular plots over a map of the forest. A ground survey visited a sample of... more
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Statistics Question

05/03/16

statistics
Suppose I roll a one four-sided die and one six-sided die. Let X be the sum of the dots showing on two die. How do I find the probabilty distribution of X?
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Statistics Question

04/29/16

Statistics
Find the probability of exactly two success in five trials of a binomial experiment in which the probability of success is 50%. Round to the nearest tenth of a percent.
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