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Statistics

08/24/22

Let Z be a random variable with a Standard Normal distribution (

Let Z be a random variable with a Standard Normal distribution (). Calculate the following probability. Include all four decimal places in your answer.

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Statistics

08/24/22

Let Z be a random variable with a Standard Normal distribution (

Let Z be a random variable with a Standard Normal distribution (). Calculate the following probability. Include all four decimal places in your answer. p(z>−1.2)=

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Statistics

08/24/22

Let Z be a random variable with a Standard Normal distribution (mu equals 0 comma space sigma equals 1). Calculate the following probability. Include all four decimal places in your answe

Let Z be a random variable with a Standard Normal distribution (). Calculate the following probability. Include all four decimal places in your answer.

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Statistics

08/23/22

The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 50 ounces and a standard deviation of 3 ounces.

The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 50 ounces and a standard deviation of 3 ouncesb) What percentage of the... more

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Statistics Probability

08/21/22

Probability Question

A baker put 500 raisins into dough, mixed well, and made 100 cookies. You take a random cookie. What is the probability of finding at least 4 raisins in it? (Hint: use Poisson approximation to the... more

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Statistics Probability

08/21/22

The number of cars washed in a certain car wash station is a Poisson random variable with a mean of 6 cars per hour

(a) What is the probability that next car arriving to this station will wait less than 45 minutes? (b) What is the probability that at least 1 cars will be washed in 30 minutes period?

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Statistics Probability

08/21/22

The number of customers arriving per hour at a certain automobile service facility is assumed to follow a Poisson distribution with λ = 7 .

(a) Compute the probability that more than 10 customers will arrive in a 3-hour period. (b) What is the mean number of arrivals during a 4-hour period?

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Statistics Probability

08/21/22

It is estimated that 80% of people in Cyprus take paracetamol for headache treatment. Out of 5 having headache, find the probability that exactly 2 will take paracetamol.

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Statistics Probability

08/21/22

One prominent physician claims that 70% of those with lung cancer are heavy smokers. If his assertion is correct, find the probability that out of 10 such patients recently admitted to a hospital

(a) more than half are heavy smokers (b) exactly 4 are heavy smokers (c) less than 2 are non- smokers

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Statistics Probability

08/21/22

If the probability of a defective bolt is 0.1, find

a)the meanb)the standard deviation for the distribution of defective bolts in a total of 400.

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Statistics Probability

08/20/22

Probability of A give B

This is a probability question. What is the probability of A and B if the Probability of A|B = .6What is the Probability of A intersect B?

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Statistics

08/19/22

What is the probability of 180,000 people out of 1,275,000 own/hold 75 million shares out of 135 million shares within one year?

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Statistics

08/17/22

You want to obtain a sample to estimate a population proportion.

You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable estimate for the population proportion. You would like to be 98% confident that your... more

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Statistics

08/17/22

A political candidate has asked you to conduct a poll to determine what percentage of people support her.

A political candidate has asked you to conduct a poll to determine what percentage of people support her.If the candidate only wants a 9% margin of error at a 90% confidence level, what size of... more

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Statistics

08/17/22

Express the confidence interval (79.7%,87.5%)(79.7%,87.5%) in the form of ˆp±Ep^±E.

Express the confidence interval (79.7%,87.5%)(79.7%,87.5%) in the form of ˆp±Ep^±E.% ±± %

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Statistics

08/17/22

Assume that a sample is used to estimate a population proportion p. Find the 80% confidence interval for a sample of size 368 with 75 successes

Assume that a sample is used to estimate a population proportion p. Find the 80% confidence interval for a sample of size 368 with 75 successes. Enter your answer as a tri-linear inequality using... more

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Statistics

08/17/22

Assume that a sample is used to estimate a population proportion p.

Assume that a sample is used to estimate a population proportion p. Find the 90% confidence interval for a sample of size 234 with 11% successes. Enter your answer as an open-interval (i.e.,... more

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Statistics

08/17/22

85 students at a college were asked whether they had completed their required English 101 course, and 67 students said "yes"

85 students at a college were asked whether they had completed their required English 101 course, and 67 students said "yes". Find the best point estimate for the proportion of students at the... more

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Statistics

08/17/22

Section 8.3:Confidence Intervals (Proportions)

We wish to estimate what percent of adult residents in a certain county are parents. Out of 100 adult residents sampled, 83 had kids. Based on this, construct a 90% confidence interval for the... more

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Statistics

08/17/22

In a recent poll, 490 people were asked if they liked dogs, and 75% said they did. Find the Margin of Error for this poll, at the 90% confidence level.

In a recent poll, 490 people were asked if they liked dogs, and 75% said they did. Find the Margin of Error for this poll, at the 90% confidence level. Give your answer to four decimal places if... more

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Statistics

08/17/22

Out of 400 people sampled, 344 preferred Candidate A. Based on this, estimate what proportion of the entire voting population (p) prefers Candidate A.

Out of 400 people sampled, 344 preferred Candidate A. Based on this, estimate what proportion of the entire voting population (p) prefers Candidate A.Use a 95% confidence level, and give your... more

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Statistics Biostatistics

08/15/22

How to extract coefficients corresponding to data from each time in a mixed effect model in R?

I am not good at statistics and might have a naive question. Any help is appreciated.Here is the simplified question: Patients received two different vaccines twice and we collected their blood... more

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Statistics

08/15/22

Statistics homework

A national study found that college students with jobs worked an average of 22 hours per week. The standard deviation is 9 hours. A college student with a job is selected at random. Find the... more

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Statistics Math Probability

08/14/22

Assume that the events A and B satisfy P(A)=P(B)=P(B/A')=1/3 where A' is complement of A. What is P(A'UB)?

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Statistics Math Algebra 1 Algebra 2

08/14/22

Assume that the events A and B satisfy P(A)=P(B)=P(B/A')=1/3 where A' is complement of A. What is P(A'UB)?

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Answers •2

Let Z be a random variable with a Standard Normal distribution (

Let Z be a random variable with a Standard Normal distribution (

Let Z be a random variable with a Standard Normal distribution (mu equals 0 comma space sigma equals 1). Calculate the following probability. Include all four decimal places in your answe

The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 50 ounces and a standard deviation of 3 ounces.

Probability Question

The number of cars washed in a certain car wash station is a Poisson random variable with a mean of 6 cars per hour

The number of customers arriving per hour at a certain automobile service facility is assumed to follow a Poisson distribution with λ = 7 .

It is estimated that 80% of people in Cyprus take paracetamol for headache treatment. Out of 5 having headache, find the probability that exactly 2 will take paracetamol.

One prominent physician claims that 70% of those with lung cancer are heavy smokers. If his assertion is correct, find the probability that out of 10 such patients recently admitted to a hospital

If the probability of a defective bolt is 0.1, find

Probability of A give B

What is the probability of 180,000 people out of 1,275,000 own/hold 75 million shares out of 135 million shares within one year?

You want to obtain a sample to estimate a population proportion.

A political candidate has asked you to conduct a poll to determine what percentage of people support her.

Express the confidence interval (79.7%,87.5%)(79.7%,87.5%) in the form of ˆp±Ep^±E.

Assume that a sample is used to estimate a population proportion p. Find the 80% confidence interval for a sample of size 368 with 75 successes

Assume that a sample is used to estimate a population proportion p.

85 students at a college were asked whether they had completed their required English 101 course, and 67 students said "yes"

Section 8.3:Confidence Intervals (Proportions)

In a recent poll, 490 people were asked if they liked dogs, and 75% said they did. Find the Margin of Error for this poll, at the 90% confidence level.

Out of 400 people sampled, 344 preferred Candidate A. Based on this, estimate what proportion of the entire voting population (p) prefers Candidate A.

How to extract coefficients corresponding to data from each time in a mixed effect model in R?

Statistics homework

Assume that the events A and B satisfy P(A)=P(B)=P(B/A')=1/3 where A' is complement of A. What is P(A'UB)?

Assume that the events A and B satisfy P(A)=P(B)=P(B/A')=1/3 where A' is complement of A. What is P(A'UB)?

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