945 Answered Questions for the topic Statistics Question

Statistics Question

03/03/16

What is the chance HRC finds a sample mean between $477 and $527?
Human Resource Consulting (HRC) surveyed a random sample of 60 Twin Cities construction companies to find information on the costs of their health care plans. One of the items being tracked is the... more
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Statistics Question Conditional Probability

03/01/16

Billy takes two tests in his probability and statistics class.
The probability that Billy would pass at least one test is 0.9. The probability that he passes both tests is 0.7. The tests are of equal difficulty (that is, the probability that Billy passes test... more
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Statistics Question

02/29/16

If four patients take the drug, what is the probability that none of the patients will experience side effects?
I have no idea how to answer this question
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Statistics Question

02/28/16

Mean of 158 and a standard deviation of 21. Find the mean and standard error of the mean of this sampling distribution when using random samples of size 5
Normally distributed. Answer choices are A. 158, 5 B. 158, 21 C. 158, 9.39 D. 158, 4.2
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Statistics Question

02/26/16

For a continuous probability distribution, 0 = x = 15. What is P(x > 15)? (Enter an exact number as an integer, fraction, or decimal.) P(x > 15) =
For a continuous probability distribution, 0 ≤ x ≤ 15. What is P(x > 15)? (Enter an exact number as an integer, fraction, or decimal.) P(x > 15) =
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Statistics Question Statistics

02/26/16

Statistics (2). Please Help!
Twelve different video games showing substance use were observed and the duration times of game play? (in seconds) are listed below. The design of the study justifies the assumption that the sample... more
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Statistics Question

02/25/16

Statistics Question
1. There are 23 people at a party. Explain what the probability is that any two of them share the same birthday. 6.3%2. A cold and flu study is looking at how two different medications work on sore... more
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Statistics Question Statistics Probability & Statistics

02/24/16

Statistics Question: Cholesterol levels are normally distributed with a mean of 170 and a SD of 30.
Find the probability a randomly selected individual has a cholesterol level greater than 225.    The answer is = 0.0336 But i am not sure how to find this answer. 
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Statistics Question Statistics Probability & Statistics

02/24/16

Statistics Question: (1) The weight of a sperm whale's brain is NORMALLY Distributed with a mean of 15.5
pounds and a standard deviation of 3.6 pounds. What is the probability that a randomly selected sperm whale has a brain that weighs between 10- 20 pounds?    (2) Same question but what is the... more
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Statistics Question

02/24/16

1.An unfair coin has a probability of coming up heads of 0.65.
An unfair coin has a probability of coming up heads of 0.65. The coin is flipped 50 times. What is the probability it will come up heads 25 or fewer times? (Give answer to at least 3 decimal places).
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Statistics Question Biostatistics

02/23/16

Statistics Question
Assume the average weight of a full-term newborn infant (i.e. 39-40 weeks gestation) in the US is 3400g. Suppose we measure the birth weight of 1000 (full-term) infants born to alcoholic mothers.... more
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Statistics Question

02/23/16

Assume your null hypothesis is that 50.5% of all households currently have Internet access. You take a random sample of 50 households and find that 34 of the ho
 It is for statistics homework. 
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Statistics Question

02/22/16

2. Find x and y so that the ordered data set has a mean of 42 and a median of 35. 17 , 22 , 26 , 29 , 34 , x , 42 , 67 , 70 , y
2. Find x and y so that the ordered data set has a mean of 42 and a median of 35. 17 , 22 , 26 , 29 , 34 , x , 42 , 67 , 70 , y  
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Statistics Question

02/22/16

if a player finished 88 last year and 11 this year what was his percentage of improvement
ranked 88  now ranked 11 what is the percent of improvemnet
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Statistics Question Statistics

02/22/16

how do I find the answer to P(z<-1.26)
I can't seem to figure out how to calculate the answer to this question. I have a few more that I can't seem to get either:   P(Z < -1.26)   P(Z > 0.72)   P(-1.52 < Z < 2.66)  
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Statistics Question

02/18/16

Statistical Forcasting
If I get one response from 374 mailers in 10 days, how many mailers do I need to get one response in 6 days?
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Statistics Question

02/17/16

According to the UCR, 44% of robberies take place on a street or highway.
4. According to the UCR, 44% of robberies take place on a street or highway. By hand, calculate the complete binomial probability distribution for a sample of 4 robberies and answer the following... more
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Statistics Question

02/15/16

What does A denote?
If A denotes some? event, what does Upper A overbarA ?denote? If ?P(A)equals=0.9930.993?, what is the value of ?P(Upper A overbarA?)? If ?P(A)equals=0.9930.993?, is Upper A overbarA ?unusual?
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Statistics Question Statistic

02/15/16

A report based on the Current Population Survey.....
A report based on the Current Population Survey estimates the 1991 median weekly family wage and salary earnings as $664. An approximate 95% confidence interval for the 1991 median weekly earnings... more
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Statistics Question

02/13/16

a pharmaceutical company receives large shipments of aspirin tablets. The acceptance sampling plan is to randomly select and test 13 tablets, then accept the wh
 a pharmaceutical company receives large shipments of aspirin tablets. The acceptance sampling plan is to randomly select and test 13 tablets, then accept the whole batch is there is only one or... more
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Statistics Question

02/08/16

I have no idea how to do stat and have a wooksheet to complete. this is one question
suppose that the systolic blood pressure in a healthy population is normally distributed with µ = 125 and σ2 = 64 mm Hg . What area of the curve is above 125? What area of the curve is below 130?... more
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Statistics Question

02/06/16

Calculate SS, variance, and standard deviation for the sample of n = 4 scores: 7, 4, 2, 1 (The computational formula works well with these scores)
Calculate SS, variance, and standard deviation for the sample of n = 4 scores: 7, 4, 2, 1. (The computational formula works well with these scores)
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02/05/16

Probability and Statistics Help!
The Las Vegas odds on the Denver Broncos winning the 1998 Super Bowl were 5 to 2. If a gambler had bet $46 on the Broncos, how much would the gambler have won in addition to having the wager... more
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Statistics Question

02/04/16

there are 660 women in a village and the sum of their hieights are 3,511.2 feet. what is their average height?
there are 660 women in a village and the sum of their hieights are 3,511.2 feet. what is their average height?
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Statistics Question

02/03/16

statictics
an inspector must select three tests to perform in a certain order on a manufactured part.He has a choice of 9 tests.How many ways can he perform 3 differnt tests?
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