1,029 Answered Questions for the topic Statistics Question

Statistics Question

02/02/15

Statistical Help
Suppose IQ scores were obtained from randomly selected siblings. For 20 such pairs of people, the linear correlation coefficient is 0.887 and the equation of the regression line is y = -2.86 +... more
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Statistics Question

02/02/15

Statistical Help
Assume that the significance level is a = 0.05.  Use the given information to find the P-value and the critical value with H1 ; P ≠1/2, the test statistic is z = -1.36   p-value = ____   the... more
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Statistics Question

02/02/15

Statistical Help
In a test of the effectiveness of garlic for lowering cholesterol, 44 subjects were treated with garlic in a processed tablet form.  Cholesterol levels were mearsured before and after the... more
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Statistics Question

02/02/15

Statistical Question
If np≥5 and nq≥ 5 estimate P(more than 4) with n=14 and p = 0.7 by using the normal distribution as an approximation to the binomial distribution if np<5 or nq<5, then state tha the normal... more
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Statistics Question

02/02/15

Statistical Help
A survey found that women heights are normally distributed with mean 63.4 in. and standard deviation 2.5 in. A branch of the military requires women's heights to be between 58in and 80 in.A) Find... more
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Statistics Question

02/01/15

Compute the range and sample standards deviation for strength of the concrete 3980, 4050, 3400, 3000, 2940, 3810, 4050, 4020
The range and sample 
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Statistics Question

01/19/15

the area that lies between Z=-0.23 and Z=0.23 is
the area that lies between Z=-0.23 and Z=0.23 is
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Statistics Question Statistics

01/18/15

Statistic Question - I am trying to solve this problem but I dont know how! Could someone help me? Thank you!
An underwriter of home insurance policies studies the problem of home fires resulting from wooding-burning furnaces. Of all homes having such furnaces, 30% own a type 1 furnace, 25% a type 2... more
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Statistics Question

01/17/15

Statistic Question - I am trying to solve this problem but I dont know how! Could someone help me? Thank you!
Of a finance company`s loans, 1% are defaulted (not completely repaid). The company routinely runs credit checks on all loan applicants. It finds that 30% of defaulted loans went to poor risks, 40%... more
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Statistics Question

01/17/15

Statistic question - An underwriter of home insurance policies studies the problem of home fires resulting from wooding-burning furnaces.
An underwriter of home insurance policies studies the problem of home fires resulting from wooding-burning furnaces. Of all homes having such furnaces, 30% own a type 1 furnace, 25% a type 2... more
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Statistics Question

01/17/15

Of a finance company`s loans, 1% are defaulted (not completely repaid). The company routinely runs credit checks on all loan applicants. It finds that....
Of a finance company`s loans, 1% are defaulted (not completely repaid). The company routinely runs credit checks on all loan applicants. It finds that 30% of defaulted loans went to poor risks, 40%... more
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Statistics Question

01/15/15

Texas Hold em Question
in the game of texas hold em a player is dealt two cards (called hole cards) from a shuffled standard deck of 52 playing cards. The order in which the cards are dealt does not matter. A. Find the... more
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Statistics Question Probability

01/14/15

The probability of students
70% like chocolate ice cream, 40% like strawberry ice cream, and 30% like both. If a student is randomly selected what is the probability that they like chocolate or strawberry but not both
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Statistics Question

01/05/15

When the correlation coefficient shows letters as well as numbers (example: '1.181e-07') is this an error and how do I correct it?
I am using Stata and appear to have an error. The correlation coefficient - and the 95% confidence interval and standard errors - are showing letters in addition to numbers. I have no idea how to... more
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Statistics Question

01/04/15

Question is on calculating a median in a ranged response to a survey.
468 answered a question in the survey. The median response is 234. But, the response falls within a ranged answer, $100,000 - $200,00. 41 answered the first ranged response, Less than $100,000 and... more
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Statistics Question

12/21/14

Statistic Help, and I need it fast
A local radio station plays 40 rock-and-roll songs during each 4-hour show. The program director at the station needs to know the total amount of airtime for the 40 songs so that time can also be... more
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Statistics Question

12/21/14

Statistic Help, and I need it fast
A tire manufacturer designed a new trend pattern for its weather tires. Repeatered test were conducted on cars of approximately the same weight traveling at 60 miles per hour. The test showed that... more
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Statistics Question

12/21/14

probability/Confidence intervals
The manufacturer of a coffee dispensing machine claims that the ounces per cuphas a distribution with mean μ = 0.7 ounces.  and standard deviation σ = 0.7 ounces. If 39 cupsare measured, what is... more
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Statistics Question

12/21/14

statistics
A wildlife study is designed to find the mean weight of salmon caught by an Alaskan fishing company. As a preliminary study, a random sample of 50 freshly caught salmon is weighed. The sample... more
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Statistics Question

12/19/14

what is the value of the correlation coefficient?
A researcher measures the relationship between narcissism and willingness to help. If SS_xy=240, SS_x=320, and SS_y=410, what is the value of the correlation coefficient?
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Statistics Question

12/15/14

Statistics Null and alternative hypothesis
A sociologist believes that women sleep longer per night on the weekend than men.Sixty onepeople were surveyed. The following summary statistics were determinedfrom the... more
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Statistics Question

12/15/14

Statistics Null and alternative hypothesis
Historically, the mean dollar spent for in-store retail purchases (charges) on the VistaCharge Card the day after Thanksgiving Day(BLACK FRIDAY) for customers who use theirVista Charge Card that... more
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Statistics Question Math Statistics Word Problem

12/14/14

Statistice help??? Confidence interval & sampling error.
A company surveyed 600 people for a new retirement plan. 235 employees prefered the new plan. What is the employee population proportion that would agree to the new plan? Find a confidence interval... more
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Statistics Question Statistics

12/12/14

Testing claim with hypothesis test and constructing confidence level with two sets of data?
In a randomized controlled trial in Kenya, 343 infants used bednets and 15 devloped Malaria. 294 infants did not use bednets and 27 devloped Malaria. With a significance level of 0.01, test the... more
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Statistics Question

12/11/14

Test Statistic Z-Value. Please help!
100 people in New York and 100 people from Chicago, were each asked "do you like your own cities style of pizza better than the other one?" The number of people that said yes in new york is... more
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