945 Answered Questions for the topic Statistics Question

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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Statistics Question

12/11/14

Need help for this exercise
  Please read the following narrative and answer the following questions:Researchers compared urinary bacteria levels of elderly women who drank 10 ounces of a juice drink containing cranberry... more
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Statistics Question

12/11/14

for the standard normal variable Z, find the number c such that P(-c<Z<z)=.74
for the standard normal variable Z, find the number c such that P(-c<Z<z)=.74
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Statistics Question Statistics Math Help Mathematics

12/08/14

Weights of a certain model of fully loaded gravel trucks follow a normal distribution with mean µ=6.4 tons and standard deviation s=0.3 ton.
Weights of a certain model of fully loaded gravel trucks follow a normal distribution with mean μ=6.4 tons and standard deviation σ=0.3 ton. What is the probability that a fully loaded truck of... more
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Statistics Question

12/07/14

there are 10 students
there are 10 students : 6 females and 4 males , in professor lee's statistic class. if he chooses 4 students whast the probability that (a) choosing 3 makes (b) at last three males, and (c) less... more
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Statistics Question

12/07/14

Develop a 95% confidence interval estimate for the proposition of all Chattannoga residents who voted for the Democratic Candidate.
In a random sample of 400 residents of Chattanooga, 320 residents indicated that they voted for the Democratic candidate in the presidential elections.
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Statistics Question

12/06/14

distance travelled per truck is normally distributed with a mean of 50.0 thousand kilometres and a standard deviation of 12.0 thousand kilometres.
A trucking company has determined that on an annual basis the distance travelled per truck is normally distributed with a mean of 50.0 thousand kilometres and a standard deviation of 12.0 thousand... more
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Statistics Question

12/05/14

Suppose the FDA wishes to conduct a hypothesis test to evaluate the null hypothesis that the population mean is 260 milligrams. Conduct this hypothesis test
Suppose the FDA wishes to conduct a hypothesis test to evaluate the null hypothesis that the population mean is 260 milligrams. Conduct this hypothesis test for the FDA. Please conduct this... more
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Statistics Question

12/05/14

a. Suppose the FDA wishes to conduct a hypothesis test to evaluate the null hypothesis that the population mean is 260 milligrams. Conduct this hypothesis test
Suppose the FDA wishes to conduct a hypothesis test to evaluate the null hypothesis that the population mean is 260 milligrams. Conduct this hypothesis test for the FDA. Please conduct this... more
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Statistics Question Statistics

12/02/14

Find the degrees of freedom for the F statistic and then use Table E to approximate the P-value
a. seven groups are being compared with 5 observations per group. the value of the f statistic is 2.69 b. five groups are being compared with 11 observations per group. the value for the f... more
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