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Statistics

04/26/22

Level of Significance

A new treatment for a certain disease is claimed to be effective in more than 80 % of cases . To test this claim the treatment was given to 100 randomly selected patients . The treatment was... more

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Statistics

04/26/22

According to a National Health Survey, American men's heights are normally distributed with a mean ...

According to a National Health Survey, American men's heights are normally distributed with a mean given by μ= 69.7 inches and a standard deviation given by σ=2.8 inches. If a man is randomly... more

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Statistics

04/26/22

One out of every three Americans believes that the U.S government should take "primary responsibility"...

One out of every three Americans believes that the U.S government should take "primary responsibility" for eliminating poverty in the United States. If 30 Americans are selected, find the... more

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Statistics

04/26/22

Express the confidence interval 64.4 % < p < 82.4 % in the form of ˆ p ± M E .

Express the confidence interval 64.4%<p<82.4% in the form of ˆp±ME.

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Statistics

04/26/22

If n=560 and ˆ p (p-hat) =0.49, find the margin of error at a 95% confidence level

If n=560 and ˆp (p-hat) =0.49, find the margin of error at a 95% confidence level

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Statistics

04/25/22

the area between z= -0.29 and z= 2.26 is

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Statistics Probability Normal Curve

04/25/22

find the area of z=1.31 and sketch

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Statistics

04/24/22

The population mean annual salary for environmental compliance specialist is about $60,000. A Random sample of 36 specialist is drawn from this population. What is the probability that the main... more

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Statistics Science Psychology Physical Science

04/24/22

Please help me write the result of correlation coefficient of the research paper

https://drive.google.com/file/d/1_cs2AStcvpu4ZQaF9KramI4G45Qv3tr2/view?usp=sharing

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Statistics Math Probability Maths

04/24/22

Show your answers by following the 5 steps of testing hypothesis.

Research suggests that most people need at least 7 hours of sleep each night in order to function well the next day. Some research suggests that lack of sleep can adversely affect health, memory,... more

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Statistics Epidemiology

04/24/22

Which of the following is an appropriate confidence interval to indicate significance for an OR=4.5? A. 2.6 to 4.4 B. 1.3 to 6.7 C. 0.5 to 6.7 D. -3.4 to 4.5

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Statistics

04/23/22

Statistics Question

At Saint Algebra College, the 200 freshmen enrolled in introductory biology took a final exam on which their mean score was 72 and their standard deviation was 6. Below are the grades of... more

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Statistics Math Probability Mathematics

04/22/22

Show your answer by following the 5 steps in testing hypothesis.

Research suggests that most people need at least 7 hours of sleep each night in order to function well the next day. Some research suggests that lack of sleep can adversely affect health, memory,... more

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Statistics Biostatistics Data Data Science

04/22/22

What statistical test should I use for this statistics report?

I will copy-paste my questionshttps://drive.google.com/file/d/1j1yRqwith0wlm1ool4pPQf-iw8_1JIw7/view?usp=sharingthis is the data im meant to use, im meant to use excel. tysm!I understand this is a... more

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Statistics Probability

04/22/22

How many 5-letter words contain two vowels and three consonants?

In this question, words are sequences of letters from the English alphabet, vowels are the letters a, e, i, o, and u, and all the other letters are consonants. (a) How many 5-letter words contain... more

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Statistics

04/22/22

Z-score = Given that the average IQ of a person is 82 with a standard deviation of 15 points. Translate the following IQ scores into standardized scores

IQ = 72 98

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Statistics

04/21/22

Use the range rule of thumb for identifying significant values to identify the limits separating values that are significantly low or significantly high

Body and exam measurements were collected from 300 subjects. The pulse rates from 100 males have a mean of 68.8 beats per minute and a standard deviation of 10.9 beats per minute. Use the range... more

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Statistics

04/21/22

Statistics CLT Homework

A manufacturer knows that their items have a normally distributed length, with a mean of 20 inches, and standard deviation of 1.8 inches.If 25 items are chosen at random, what is the probability... more

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Statistics

04/20/22

Suppose X ~ N(4, 2). What value of x is three standard deviations to the right of the mean? (Enter an exact number as an integer, fraction, or decimal.)

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Statistics

04/20/22

Suppose the probability of an IRS audit is 5.2 percent for U.S. taxpayers who file form 1040 and who earned $100,000 or more.

A) What are the odds that such a taxpayer will be audited? _____ to _____B) What are the odds against such a taxpayer being audited? _____ to _____

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Statistics

04/19/22

x1,x1,...xn are i.i.d. and ~N(0,1), find E(x_i)

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Statistics

04/19/22

(a) What is the probability that there is at least 50% red M&Ms in the random sample? (b) What is the probability no more than one-third of the M&Ms in the random sample are red?

51% of the M&Ms in a large bag of M&Ms are red. Suppose you take a random sample of 30 M&Ms from the large bag. (Round your answers to four decimal places.)

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Statistics

04/19/22

(a) What is the probability that there is at least 50% red M&Ms in the random sample? (b) What is the probability no more than one-third of the M&Ms in the random sample are red?

51% of the M&Ms in a large bag of M&Ms are red. Suppose you take a random sample of 30 M&Ms from the large bag. (Round your answers to four decimal places.)

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Statistics Probability

04/18/22

Suppose a jar contains 8 red marbles and 36 blue marbles. If you reach in the jar and pull out 2 marbles at random at the same time, find the probability that both are red.

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Statistics

04/18/22

Sample Size Calculation

An IQ test is designed so that the mean is 100 and the standard deviation is 15 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of statistics... more

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Level of Significance

According to a National Health Survey, American men's heights are normally distributed with a mean ...

One out of every three Americans believes that the U.S government should take "primary responsibility"...

Express the confidence interval 64.4 % < p < 82.4 % in the form of ˆ p ± M E .

If n=560 and ˆ p (p-hat) =0.49, find the margin of error at a 95% confidence level

the area between z= -0.29 and z= 2.26 is

find the area of z=1.31 and sketch

Statistics Homework

Please help me write the result of correlation coefficient of the research paper

Show your answers by following the 5 steps of testing hypothesis.

Which of the following is an appropriate confidence interval to indicate significance for an OR=4.5? A. 2.6 to 4.4 B. 1.3 to 6.7 C. 0.5 to 6.7 D. -3.4 to 4.5

Statistics Question

Show your answer by following the 5 steps in testing hypothesis.

What statistical test should I use for this statistics report?

How many 5-letter words contain two vowels and three consonants?

Z-score = Given that the average IQ of a person is 82 with a standard deviation of 15 points. Translate the following IQ scores into standardized scores

Use the range rule of thumb for identifying significant values to identify the limits separating values that are significantly low or significantly high

Statistics CLT Homework

Suppose X ~ N(4, 2). What value of x is three standard deviations to the right of the mean? (Enter an exact number as an integer, fraction, or decimal.)

Suppose the probability of an IRS audit is 5.2 percent for U.S. taxpayers who file form 1040 and who earned $100,000 or more.

x1,x1,...xn are i.i.d. and ~N(0,1), find E(x_i)

(a) What is the probability that there is at least 50% red M&Ms in the random sample? (b) What is the probability no more than one-third of the M&Ms in the random sample are red?

(a) What is the probability that there is at least 50% red M&Ms in the random sample? (b) What is the probability no more than one-third of the M&Ms in the random sample are red?

Suppose a jar contains 8 red marbles and 36 blue marbles. If you reach in the jar and pull out 2 marbles at random at the same time, find the probability that both are red.

Sample Size Calculation

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