1,004 Answered Questions for the topic Statistics Question

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 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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Statistics Question

03/21/17

IM STUCK! PLS HELP!
Assume that adults have IQ scores that are normally distributed with a mean of 105 and a standard deviation 20. Find P 15, which is the IQ score separating the bottom 15% from the top 85%.
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Statistics Question

03/20/17

which level of measurement is required for the mean?
which level of measurement is required for the mean?  
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Statistics Question

03/18/17

A set of data has an interquartile range of 20 and a lower quartile range of 6. if the data is symmetrica, what is the value of the median?
A set of data has an interquartile range of 20 and a lower quartile range of 6. if the data is symmetrica, what is the value of the median? Please help and explain the outcome..Thanks so much
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Statistics Question Statistics Statistic Sos

03/16/17

Application of Sets
A survey of 72 customers was taken at a bookstore regarding the types of books purchased. The survey found that 43 customers purchased mysteries, 33 purchased sciencefiction, 27 purchased romance... more
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Statistics Question

03/13/17

defective item
defective item, 10 item, some are bad, probability without replacement  
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Statistics Question Statistics Math Help Math Word Problem

03/12/17

stats question
For a normal shaped distribution with μ = 50 and σ = 8: A. What proportion of the scores fall between 46 and 54? B. For samples of n = 4, what proportion of the sample means fall between 46 and 54?... more
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Statistics Question

03/11/17

How to statistically see if there is a correlation
Hi,   Ive got 2 sets of data. 181 figures in each. Can I use Pearson's Corrrelation Coefficient to see if there is a correlation between them. And if so what would this mean r = -0.28, p =... more
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Statistics Question

03/10/17

how to combine two histograms on SPSS stat system
creating a table with a few selected variables within the data set.  I have two tables but would like to combine the two. Can that be done  
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Statistics Question

03/05/17

Statistics
in a test of indigestion tablets, 164 out of a sample of 200 people found out that the tablets were effective. The research team claimed that the tablet was 90% effective. Does the evidence support... more
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Statistics Question Math Statistics Math Help

02/24/17

A highly selective university will only admit students who place in the top 10% on aplacement exam with an average score of 18 and an SD of 6.
The lowest score that a student can earn and be admitted to the university is:         Please help me my Stats teacher is very unclear and is rushing through the material. I cannot fail this... more
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Statistics Question Math Statistics Standard Deviation

02/24/17

The monthly utility bills in a city have an average of $67 and an SD of $7. The percentage of the utility bills in this city that are above $75 is:
 I am struggling with this homework for a stats course. The teacher is very unclear and I cannot afford to fail. Any help would be appreciated it
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Statistics Question

02/24/17

Y=10 + 0.9x, where y represents the final exam score and x is the midterm exam score. Suppose Joe scores an 80.What would be the predicted value of his score
A.81B.The answer cannot be determined from the information given.C.82D.91
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02/23/17

Probability Statistics question, a bit confused.
A population of snakes have total lengths: 7cm, 5cm, 10cm, 13cm, and 9cm.   If two snakes are selected at random without replacement (order does not matter), what is the probability that the... more
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Statistics Question

02/22/17

When a customer withdraws $40 they can only get either two $20 or four $10. If two customers withdraw $40 each, how many outcomes are possible?
Creating a tree diagra.
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Statistics Question

02/20/17

have 35 tulips, 14 red, 11 yellow, 10 purple: what is the probability one is red and one is yellow
What is the probability on have one red and one yellow tullip
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