1,029 Answered Questions for the topic Statistics Question

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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04/12/17

What is the probability of choosing 2 white balls and 3 red balls?
a barrel contains 7 yellow balls, 3 green balls, 11 white balls, 5 red balls and 4 orange balls. What is the probability of choosing 2 white balls and 3 red balls?
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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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Statistics Question

03/30/17

the average sat score of the population of sat takers was 1500. The average of a certain sample was 1620. What is the sampling error?
I need to know the answer dammit
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Statistics Question Statistics Stats

03/29/17

Statistics: Confidence Intervals
6. Independent random samples were drawn from two normal populations assumed to have the approximatelythe same standard deviation, resulting in the following summary statistics:n1 = 25, s1 = 4.8,... more
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Statistics Question

03/27/17

Economists believe that consumer choice theory is useless because of its lack of predictive ability
Economists believe that consumer choice theory is useless because of its lack of predictive ability
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Statistics Question

03/24/17

when starting a study using men and women should the number be equal?
 When starting a survey using male and female participants should the number be equal?  
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Statistics Question

03/22/17

The probability a person is left-handed is 0.14. In a group of 45 people, what is the probability that exactly five are left-handed?
 The probability a person is left-handed is 0.14. In a group of 45 people, what is the probability that exactly five are left-handed?    Binomial probabilities?
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