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Statistics

03/05/24

Assume that a sample is used to estimate a population proportion p. Find the 99% confidence interval for a sample of size 142 with 61% successes

Assume that a sample is used to estimate a population proportion p. Find the 99% confidence interval for a sample of size 142 with 61% successes. Enter your answer as an open-interval (i.e.,... more

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Statistics

03/05/24

In a recent poll, 290 people were asked if they liked dogs, and 69% said they did.

In a recent poll, 290 people were asked if they liked dogs, and 69% 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

03/05/24

A newsgroup is interested in constructing a 90% confidence interval for the proportion of all Americans who are in favor of a new Green initiative.

A newsgroup is interested in constructing a 90% confidence interval for the proportion of all Americans who are in favor of a new Green initiative. Of the 569 randomly selected Americans surveyed,... more

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Statistics

03/05/24

Express the confidence interval 3.8% <p< 17.2% in the form of p^ +- E.

Express the confidence interval 3.8% <p< 17.2% in the form of p^ +- E.__% +- %__

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Statistics

03/05/24

Assume that a sample is used to estimate a population proportion p. Find the 99.9% confidence interval for a sample of size 223 with 43% successes.

Assume that a sample is used to estimate a population proportion p. Find the 99.9% confidence interval for a sample of size 223 with 43% successes. Enter your answer as a tri-linear inequality... more

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Statistics

03/05/24

Assume that a sample is used to estimate a population proportion p. Find the 99% confidence interval for a sample of size 142 with 61% successes.

Assume that a sample is used to estimate a population proportion p. Find the 99% confidence interval for a sample of size 142 with 61% successes. Enter your answer as an open-interval (i.e.,... more

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Statistics

03/05/24

What is the relationship between the amount of time statistics students study per week and their final exam scores? The results of the survey are shown below.

What is the relationship between the amount of time statistics students study per week and their final exam scores? The results of the survey are shown... more

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Statistics

03/04/24

Statistics help

American Airlines' flights from Chicago to Dallas are on time 90 % of the time. Suppose 14 flights are randomly selected, and the number on-time flights is recorded.1.The probability that at least... more

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Statistics

03/04/24

Statistics help

If you buy a meal at Burger Bash, there is a 34% chance of winning a free hamburger. If 6 friends meet for lunch at Burger Bash, and they each buy a meal, what is the probability that exactly 2 of... more

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Statistics

03/04/24

If a seed is planted, it has a 85% chance of growing into a healthy plant. If 10 seeds are planted, what is the probability that exactly 2 don't grow?

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Statistics

03/04/24

Need help solving it

The Venn diagram here shows the number of people in each set. Use this to find the probability of observing the given set. Round answer to 4 decimal... more

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Statistics

03/04/24

Need help solving

The 3 set Venn diagram here shows the number of people in each set. Use this to find the probability of observing the given set. 1014745714ABC[Graphs generated by this script:... more

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Statistics

03/04/24

need help solving it

An urn contains 10 red, 11 white and 20 blue marbles. A child selects two marbles at random and without replacement from the urn.Find the probability that the colors of the selected marbles are... more

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Statistics

03/03/24

Use standard normal distribution to find P(-2.25<z<0)

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Statistics

03/02/24

A recent national report states the marital status distribution of the male population age 18 or older is as follows: Never Married (32.3%), Married (55.3%), Widowed (2.4%), Divorced (10%).

A recent national report states the marital status distribution of the male population age 18 or older is as follows: Never Married (32.3%), Married (55.3%), Widowed (2.4%), Divorced (10%). The... more

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Statistics

03/01/24

Let's say that the mean of a test scores is 80. What do you think will be the new mean if we add 3 points to each test score?

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Statistics

03/01/24

What is the Alternative Hypothesis?

A study is designed to determine the effect of an office-training course on typing productivity. Fifteen typists who have not taken the course are randomly selected. The investigator... more

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Statistics

02/27/24

A population of values has a normal distribution with μ = 61.4 and σ = 61.1 . You intend to draw a random sample of size n = 219 . What is the mean of the distribution of sample means?

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Statistics

02/27/24

If you pick one fruit at random, what is the probability that it will weigh between 257 grams and 346 grams

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Statistics

02/27/24

What is the mean of the distribution of sample means? μ ¯ x =

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Statistics

02/27/24

A population of values has a normal distribution with μ = 61.4 and σ = 61.1 . You intend to draw a random sample of size n = 219 .

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Statistics

02/27/24

Find the probability that the height of a randomly selected tree is between 220.9 ft and 246 ft. P(220.9 < X < 246)

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Statistics

02/26/24

Intro to Stats and Analytics

For a standard normal distribution, find:P(-2.7 < z < 0.17)Round your probabilty accurate to 4 decimal places.

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Statistics

02/26/24

Intro to Stats and Analytics

For a standard normal distribution, find:P(z > 1.6)Round your probabilty accurate to 4 decimal places.

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Statistics

02/26/24

Intro to Stats and Analytics

For a standard normal distribution, find:P(z < -2.42)Round your probabilty accurate to 4 decimal places.

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Assume that a sample is used to estimate a population proportion p. Find the 99% confidence interval for a sample of size 142 with 61% successes

In a recent poll, 290 people were asked if they liked dogs, and 69% said they did.

A newsgroup is interested in constructing a 90% confidence interval for the proportion of all Americans who are in favor of a new Green initiative.

Express the confidence interval 3.8% <p< 17.2% in the form of p^ +- E.

Assume that a sample is used to estimate a population proportion p. Find the 99.9% confidence interval for a sample of size 223 with 43% successes.

Assume that a sample is used to estimate a population proportion p. Find the 99% confidence interval for a sample of size 142 with 61% successes.

What is the relationship between the amount of time statistics students study per week and their final exam scores? The results of the survey are shown below.

Statistics help

Statistics help

If a seed is planted, it has a 85% chance of growing into a healthy plant. If 10 seeds are planted, what is the probability that exactly 2 don't grow?

Need help solving it

Need help solving

need help solving it

Use standard normal distribution to find P(-2.25<z<0)

A recent national report states the marital status distribution of the male population age 18 or older is as follows: Never Married (32.3%), Married (55.3%), Widowed (2.4%), Divorced (10%).

Let's say that the mean of a test scores is 80. What do you think will be the new mean if we add 3 points to each test score?

What is the Alternative Hypothesis?

A population of values has a normal distribution with μ = 61.4 and σ = 61.1 . You intend to draw a random sample of size n = 219 . What is the mean of the distribution of sample means?

If you pick one fruit at random, what is the probability that it will weigh between 257 grams and 346 grams

What is the mean of the distribution of sample means? μ ¯ x =

A population of values has a normal distribution with μ = 61.4 and σ = 61.1 . You intend to draw a random sample of size n = 219 .

Find the probability that the height of a randomly selected tree is between 220.9 ft and 246 ft. P(220.9 < X < 246)

Intro to Stats and Analytics

Intro to Stats and Analytics

Intro to Stats and Analytics

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