8,943 Answered Questions for the topic statistics

Statistics Algebra College Math

04/28/22

In a normal distribution, if mean is 8 and standard deviation is 1.5, how many percent of data fall
Show the complete solution: In a normal distribution, if mean is 8 and standard deviation is 1.5, how many percent of data falla.     Above 8.5?b.     Between 7.2 and 8.5?
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Statistics Probability

04/27/22

I need to know if the answer to this is 1, 2, 3, or 4
Mel has a bag containing white and yellow marbles.Mel randomly selects one marble from the bag,records the result, and returns the marble to the bag.The results of the first 65 selections are:A... more
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Statistics Probability

04/27/22

I need to know if the answer to this is 1, 2, 3, or 4
Mel has a bag containing white and yellow marbles.Mel randomly selects one marble from the bag,records the result, and returns the marble to the bag.The results of the first 65 selections are:A... more
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Statistics Math

04/27/22

Five number have a mean of 24, the mean of the three smallest numbers is 19 and the mean of the three largest numbers is 28 What is the median of the five numbers ?

Five number have a mean of 24, the mean of the three smallest numbers is 19 and the mean of the three largest numbers is 28 What is the median of the five numbers ? 20 21 22 23 24 25
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Statistics

04/26/22

Conclusion Confidence Interval
We have created a 95% confidence interval for μ with the result (148, 196). What conclusion will we make if we test H0: μ = 190 vs. Ha:μ ≠ 190 at α = 5%?Reject the alternative hypothesisReject the... more
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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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04/25/22

find the area of z=1.31 and sketch
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Statistics

04/24/22

Statistics Homework
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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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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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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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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