945 Answered Questions for the topic Statistics Question

Statistics Question

05/11/17

Can the variance between 2 groups be close to equal and the p-value be 0.4, stating that there's significance?
X 4,2,5,1,3,5,3,7,3,5 Y 6,5,2,8,3,4,8,5,1,4  i did an f test and my f stat was 1.75 which was less than my F critical 3.18..stating close to equal variances.   i have a p value= 0.4 so I reject... more
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Statistics Question Math Statistics Math Help

05/10/17

What hypothesis and which test do I use?
Which county had the highest median income between 2006 to 2010? The answer is Los Angeles. I have a real data, how do I turn this question to a hypothesis and which test do I use?
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Statistics Question

05/08/17

The exam scores are normally distributed with a mean of 76 and a standard deviation of 8. Bob scored an 88.Determine the z-score for Bob.
Students in a college course take a common final exam. The exam scores arenormally distributed with a mean of 76 and a standard deviation of 8.Bob scored an 88 and Tom scored a 69.a.) Determine the... more
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Statistics Question

05/08/17

Write down an expression for the linear regression equation to predict the variation in exam results from hours of study.
we are given a graph and this is the question
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Statistics Question

05/07/17

The 8th grade class of City Middle School has decided to hold a raffle to raise money to fund a trophy cabinet as their legacy to the school. A local business l
1) Suppose you buy 1 ticket. What is the probability that the ticket you buy is the winning ticket? (Assume that all 2500 tickets are sold.) 2) After thinking about the prize, you decide the prize... more
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Statistics Question

05/07/17

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 can be treated as a simple random sample. Use the data to construct a 95% confidence interval estimate of the mean duration of game... more
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Statistics Question

05/06/17

expected value of proposition and expected wins and losses
Suppose a basketball player has made 390 out of 434 free throws. If the player makes the next 2 free throws, I will pay you $40. Otherwise you pay me $169. Step 1 of 2: Find the expected value of... more
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Statistics Question Statistics

05/05/17

Intro to Stats study guide
The question on the study guide is as follows:IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. Joe has an IQ that is higher than 99% of people. What is Joe's IQ?
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Statistics Question

05/01/17

find the two-tailed question
a student takes a sample of n=30 books and records the publication date for each. The sample produces an average of M=23.8 years with a variance of s square=67.5. Use this sample to conduct a... more
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Statistics Question

04/21/17

Constructing confidence intervals
An interactive poll found that 362 of 2,243 adults aged 18 or older have at least one tattoo.(a) Obtain a point estimate for the proportion of adults who have at least one tattoo.(b) Construct a... more
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Statistics Question Probability & Statistics

04/21/17

The equation of a best fit line is y = 6x + 9. Predict a value for y when x = 4.
I don't understand how you do this math problem. 
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Statistics Question

04/18/17

College statistics (Provided Question in Description Box)
Local health authorities are concerned that the hectic pace in their city has elevated the stress, and thus the blood pressure of women. The authorities have decided to study this issue by... more
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Statistics Question Statistics Statistic Confidence

04/17/17

confident intervals and central limit theorem.
A random sample of 39 cows was fed a special high-protein grain for a month. Each was weighed before and after and the average weight gained was 6.7 pounds, with standard deviation 7.1.i. Construct... more
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Statistics Question

04/14/17

In SPSS, what is the zero-order Pearson correlation between debt and sleep equal to?
what are partial correlations in SPSS  
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Statistics Question

04/13/17

Unbiased or biased estimators
A population is formed my placing 5 balls labelled 1,2,3,4 and 5 respectively. Mean of this population is 3. Someone who does not know the contents of this bag will estimate the balue of mean by... more
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Statistics Question

04/13/17

True or False. Random assignment of subjects to treatments in a statistical experiment guarantees a causal interpretation of the results.
True or False. Random assignment of subjects to treatments in a statistical experiment guarantees a causal interpretation of the results.
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Statistics Question

04/13/17

As sample size increses, the law of large numbers guarantees the convergence of a statistic at the population parameter value
True or False. As sample size increses, the law of large numbers guarantees the convergence of a statistic at the population parameter value
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Statistics Question

04/13/17

volunteersample instead ofrandomsample, confidence interval for populationproportionparameter is still completely reliable long as the sample size is large.
True or False. If you have a volunteer sample instead of a random sample, then a confidence interval for population proportion parameter is still completely reliable as long as the sample size is... more
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Statistics Question

04/13/17

Binomial Proportions
On a multiple choice test with ten questions with five choices for each question if a student guesses at every answer find the probability of the following....   A) more than 4 correct... more
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Statistics Question

04/10/17

A certain sample space has eight equally likely outcomes: A, B, C, D, E, F, G, H. What is P(C)?
A certain sample space has eight equally likely outcomes: A, B, C, D, E, F, G, H. What is P(C)?
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Statistics Question Statistics

04/08/17

Need to find 95% confidence interval using sigma. Mean of averages is 7.29 and standard deviation of averages is .81
Project was to roll 2 dice 5 times and record sums and then repeat this 14 times and then find averages of each row so there is 15 averages. 
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Statistics Question

04/07/17

When a van is randomly​ selected, it is found to have a tire pressure of 30 psi is the data discrete or continuous?
When a van is randomly selected, it is found to have a tire pressure of 30 psi is the data discrete or continuous?
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Statistics Question

04/03/17

Having trouble with this problem
In a survey of consumers aged 12 and older, respondents were asked how many cell phones were in use by the household. (No two respondents were from the same household.) Among the respondents, 218... more
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Statistics Question Math Statistics Probability

03/31/17

Find the probability that when you select two cars, first you pick a 3 then you pick a jack (without replacement)
A probability problem 
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Statistics Question

03/31/17

A die is rolled 9 times. Each time it lands on a 5 or 6, you win one dollar. Find the probability that you win at least one dollar.
the answer is not 0.117
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