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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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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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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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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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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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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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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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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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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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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03/04/24

The equation of a circle is given below. Identify the radius and center. Then graph the circle.
(x+4)2 + (y-2) 2=9
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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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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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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?
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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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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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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02/27/24

What is the mean of the distribution of sample means? μ ¯ x =
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02/27/24

Please help me to find area
Given that the length of a rectangle is 4x-4 and the width is 11-x, find the area of the rectangle. What dimensions correspond to the largest area? Let A(x) be the area function for the rectangle.... more
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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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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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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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02/26/24

Intro to Stats and Analytics

Suppose that wedding costs in the Caribbean are normally distributed with a mean of $7000 and a standard deviation of $950. Using the Empirical rule below, estimate the percentage of Caribbean... more
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02/26/24

Intro to Stats and Analytics

In a mid-size company, the distribution of the number of phone calls answered each day by each of the 12 receptionists is bell-shaped and has a mean of 35 and a standard deviation of 9. Using the... more
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02/26/24

Intro to Stats and Analytics
A company has a policy of retiring company cars; this policy looks at number of miles driven, purpose of trips, style of car and other features. The distribution of the number of months in service... more
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02/26/24

Intro to Stats and Analytics

The physical plant at the main campus of a large state university recieves daily requests to replace florecent lightbulbs. The distribution of the number of daily requests is bell-shaped and has a... more
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