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Statistics Question

07/02/16

What is the probability that none of the restaurants are in violation of the health code?

Suppose 40% of the restaurants in a certain part of a town are in violation of the health code. A health inspector randomly selects seven of the restaurants for inspection.

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Statistics Question Statistics Probability Stats

06/27/16

A nonnegative integer-valued random variable X has a CDF of the form F(x)=1-(1/5)^x for x=1,2,.....and zero otherwise. Find P(X is odd)?

A nonnegative integer-valued random variable X has a CDF of the form F(x)=1-(1/5)^xfor x=1,2,.....and zero otherwise.Find P(X is odd)? could you please help me with that?

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Statistics Question Statistics Probability Stats

06/27/16

Suppose a lie detector test has the following properties.

Suppose a lie detector test has the following properties.If the suspect is telling the truth,the lie detector will correct say so with probability 0.85.if the suspect is lying ,it will correctly... more

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Statistics Question Statistics Probability Stats

06/27/16

A lot consists of 15 articles of which 8 are free of defects ,4 have minor defects and 3 have major defects.Five articles are selected at random without replace

A lot consists of 15 articles of which 8 are free of defects ,4 have minor defects and 3 have major defects.Five articles are selected at random without replacement find probability that at most... more

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Statistics Question Standard Deviation

06/26/16

If birth weights in a population are normally distributed with a mean of 109oz and a standard deviation of 130z.

A) What is the chance of obtaining a birth weight of 141 oz or heavier when sampling birth records at random? B) What is the chance of obtaining a birth weight of 120 or lighter?

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Statistics Question

06/26/16

Area under the curve > Z=1.34

I'm learning statistics all over again. I need to see how to find the area under the curve using z tables.

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Statistics Question

06/22/16

im not sure how to do this question

The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 0.933 g and a standard deviation of 0.308 g. Find the probability of randomly selecting a cigarette... more

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Statistics Question Statistics Probability Stats

06/21/16

Find the probability that the roots of the equation h(t)=0 are real where h(t)=t^2+2tx+y

assume that x and y are independent with x ~EXP(2) and Y~Exp(1) Find the probability that the roots of the equation h(t)=0 are real where h(t)=t^2+2tx+y Could you please help me how can I find... more

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Statistics Question Statistics Probability Stats

06/20/16

what is the probability that at least one scored 650 or better?

math sat scores are normally distributed with mean 500 and standard deviation of 100 ten students are selected at random what is the probability that at least one scored 650 or better? please... more

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Statistics Question Statistics Probability Stats

06/19/16

what distribution can be used to approximate probabilities for x ?

A computer terminal can pick up an erroneous signal from thekeyboard that does not show up on the screen. This creates a silenterror that is difficult to detect. Assume that for a particular... more

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Statistics Question Statistics Probability Stats

06/19/16

A multiple choice quiz has 10 questions each with four alternatives.

A multiple choice quiz has 10 questions each with four alternatives. Apassing score is 6 or more correct. If a student attempts to guess the correct answer to eachquestion what is the probability... more

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Statistics Question Statistics

06/19/16

I have a question from my online statistics class.

The study on calories burned per minute by walking had data from adult women only. If Shawna used the regression equation to extrapolate the calories burned per minute for a young boy, she would... more

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Statistics Question Statistics Probability Stats

06/18/16

C.D.F ,F(x)

The random variable X has pdf given by f(x)=(1+x),-1<x≤0 and f(x)=(1-x),0<x<1 & and f(x)=(1+x),-1<x<0 and f(x)=(1-x),0<x<1 && Could you help me how... more

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Statistics Question Statistics Probability Stats

06/18/16

which function can I choose to find the mean and why?

The random variable X has pdf given by f(x)=(1+x),-1<x≤0 and f(x)=(1-x),0<x<1 which function can I choose to find the mean and why?

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Statistics Question Statistics Probability Stats

06/18/16

percentile of the distribution of a continuous random variable

Could you explain to me how can we find percentile of the distribution of a continuous random variable since I search on internet but I did not find ?Thanks in advance

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Statistics Question

06/15/16

Statistics home work

Gocerment agencies carefully monitor water quality and it's effect on wetlands. Of particular concern is the concentration of nitrogen in water draining from fertilizer lands. Twenty-eight samples... more

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Statistics Question

06/15/16

Identify the sample space of the probability experiment and determine the number of outcomes in the sample space.

Identify the sample space of the probability experiment and determine the number of outcomes in the sample space. rolling dice

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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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Statistics Question Statistics Probability Continuous Probability Distribution

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

06/07/16

Find the standard error of the mean when the population standard deviation is 2.4 and a sample of size 36 is taken.

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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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What is the probability that none of the restaurants are in violation of the health code?

A nonnegative integer-valued random variable X has a CDF of the form F(x)=1-(1/5)^x for x=1,2,.....and zero otherwise. Find P(X is odd)?

Suppose a lie detector test has the following properties.

A lot consists of 15 articles of which 8 are free of defects ,4 have minor defects and 3 have major defects.Five articles are selected at random without replace

If birth weights in a population are normally distributed with a mean of 109oz and a standard deviation of 130z.

Area under the curve > Z=1.34

im not sure how to do this question

Find the probability that the roots of the equation h(t)=0 are real where h(t)=t^2+2tx+y

what is the probability that at least one scored 650 or better?

what distribution can be used to approximate probabilities for x ?

A multiple choice quiz has 10 questions each with four alternatives.

I have a question from my online statistics class.

C.D.F ,F(x)

which function can I choose to find the mean and why?

percentile of the distribution of a continuous random variable

Statistics home work

Identify the sample space of the probability experiment and determine the number of outcomes in the sample space.

Probability question: Chances of winning

Mutually Exclusive or not? Speaking Spanish and speaking Chinese

which of the following is the correct decision for a two-tailed hypothesis test?

The random variable X has pdf given by f(x)=(1+x),-1<x=0 and f(x)=(1-x),0<x<1

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 probability of exactly four successes in five trials of a binomial experiment in which the probability of success is 40%.

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?

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.

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