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Statistics Question Statisic

08/16/17

whats the proportion

the incoming cohort of juveniles in a new diversion program consist of 80 males and 120 females. Of this cohort, 140 graduate early. what is the proportion of male participation in the program?

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Statistics Question

08/16/17

An employer interviews 9 people for 5 management positions in a company, and 4 of the 9 people are women. If all 9. are qualified, in how many ways can the empl

An employer interviews 9 people for 5 management positions in a company, and 4 of the 9 people are women. If all 9. are qualified, in how many ways can the employer fill the management positions if... more

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Statistics Question

08/14/17

Reverse statistics problem

In a population of voters, 30% favour an election issue, and 70% do not favour it. In a survey it isfound that 40% of those who favour the issue vote for the ruling party, while 80% of those who... more

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Statistics Question

08/13/17

The area to the right of zequals=negative 1.42−1.42 under the standard normal curve is nothing.

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Statistics Question

08/11/17

An employer interviews 9 people for 6 management positions in a company, and 4 of the 9 people are women. If all 9 are qualified, in how many ways can the empl

An employer interviews 9 people for 6 management positions in a company, and 4 of the 9 people are women. If all 9 are qualified, in how many ways can the employer fill the management positions if... more

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Statistics Question

08/09/17

Calculate test statistic and/or p-value. (Round to 2 decimal places)

Teachers’ salaries in one state are very low, so low that educators in that state regularly complain about their compensation. The state mean is $33,600, but teachers in one district claim that the... more

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Statistics Question Probability & Statistics

08/07/17

Distribution of Sample Mean Question

Suppose the horses in a large stable have a mean weight of 818lbs, and a variance of 3481.What is the probability that the mean weight of the sample of horses would differ from the population mean... more

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Statistics Question

08/05/17

Three research department have 9,10 and 8 members respectively. Each department is to select a delegate and an alternate to represent the department at a confer

Three research department have 9,10 and 8 members respectively. Each department is to select a delegate and an alternate to represent the department at a conference. In how many ways can this be done? more

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Statistics Question

08/05/17

In how many ways can a committee consisting of 2 faculty members and 5 students be formed if there are only 11 faculty members and 12 students eligible to serve

In how many ways can a committee consisting of 2 faculty members and 5 students be formed if there are only 11 faculty members and 12 students eligible to serve on the committee?

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Statistics Question

08/05/17

In how many ways can a committee consisting of 2 faculty members and

In how many ways can a committee consisting of 2 faculty members and 5 students be formed if there are only 11 faculty members and 12 students eligible to serve on the committee?

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Statistics Question

08/05/17

An employee interviews 10 people for 5 technical support positions in a company, and 5 of the 10 of the people are woman. If all 10 are qualified in how many wa

An employee interviews 10 people for 5 technical support positions in a company, and 5 of the 10 of the people are woman. If all 10 are qualified in how many ways can the employer fill the... more

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Statistics Question

08/03/17

A psychologist is interested in knowing whether adults who were bullied as children differ from the general population in terms of their empathy for others. On

On a questionnaire designed to measure empathy, the mean score for the general population is 30.6. Random sampling of 25 scores obtained from individuals who were bullied yielded a mean of 39.5 and... more

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Statistics Question Statistics Null Hypothesis Testing

08/01/17

hypothesis testing

what unit of measure does the test statistic measure?

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Statistics Question F Test

07/31/17

F test for comparing two variances is that both populations are normally distributed. Why would validating these assumptions be a matter of statistical ethics?

The assumption of the F test for comparing two variances is that both populations are normally distributed. Why would validating these assumptions be a matter of statistical ethics? Is validating... more

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Statistics Question Statistics Math Help Math Question

07/29/17

Compare and contrast the following measures of dispersion (range, standard deviation) in terms of what each of these represent and in terms of the relative adva

Compare and contrast the following measures of dispersion (range, standard deviation) in terms of what each of these represent and in terms of the relative advantages/disadvantage of using one over... more

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Statistics Question

07/26/17

Determine the area under the standard normal curve that lies...

Determine the area under the standard normal curve that lies... A. To the left of -2.34 or to the right of 1.645. B. Between -0.88 and 2.55 C. To the left of -1 or to the right of 2 D.... more

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Statistics Question

07/25/17

Scientific Method: Stating a hypothesis, Collecting data using some sort of sampling plan; Rejecting or not rejecting the hypothesis.

Scientific Method: Stating a hypothesis, Collecting data using some sort of sampling plan; Rejecting or not rejecting the hypothesis.How would you describe the process of moving from a null... more

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Statistics Question

07/25/17

Looking for the Z score

Find the Z score for the weights of Middle school boys which are approximately Normal, mean = 130 lbs, Standard Deviation = 7, if Johnny weighs 148 lbs, What's his Z score?

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Statistics Question

07/24/17

The failure rate in a statistics class is 20%. In a class of 50 students, find the probability that less than eight students will fail.

The failure rate in a statistics class is 20%. In a class of 50 students, find the probability that less than eight students will fail. Pleaseeeee I need HELPPPP

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Statistics Question

07/24/17

The result of an exam score for a given class is normally distributed. If the mean score is 85 points and the standard deviation is equal to 20 points, find

The result of an exam score for a given class is normally distributed.

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Statistics Question Statistics

07/11/17

Confidence Interval Question

A psychologist is interested in the mean IQ score of a given group of children. It is known that the IQ scores of the group have a standard deviation of 16. The psychologist randomly selects... more

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Statistics Question

07/11/17

Test statistic and p-value

In 2004, a random sample of 46 coyotes in a region of northern Minnesota showed an average age to be 2.05 years with a standard deviation of 0.82 years. However, it is thought that the overall... more

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Statistics Question

07/08/17

Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean μ=228 days and standard deviation σ=11 days.

What is the probability that a randomly selected pregnancy lasts less than 224 days?

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Statistics Question

07/05/17

Statistics word problem

In a survey amongst freshmen at StudyMore College, the average number of hours spent studying for their math class was 15.4 hours per week with a standard deviation of 2.65. Assuming the population... more

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Statistics Question

07/05/17

Statistics word problem

A battery pack manufacturer claims their product will run two cell phones playing Pokemon go an average of 12 hours with a standard deviation of 2.4 hours. A random sample of 40 battery packs is... more

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whats the proportion

An employer interviews 9 people for 5 management positions in a company, and 4 of the 9 people are women. If all 9. are qualified, in how many ways can the empl

Reverse statistics problem

The area to the right of zequals=negative 1.42−1.42 under the standard normal curve is nothing.

An employer interviews 9 people for 6 management positions in a company, and 4 of the 9 people are women. If all 9 are qualified, in how many ways can the empl

Calculate test statistic and/or p-value. (Round to 2 decimal places)

Distribution of Sample Mean Question

Three research department have 9,10 and 8 members respectively. Each department is to select a delegate and an alternate to represent the department at a confer

In how many ways can a committee consisting of 2 faculty members and 5 students be formed if there are only 11 faculty members and 12 students eligible to serve

In how many ways can a committee consisting of 2 faculty members and

An employee interviews 10 people for 5 technical support positions in a company, and 5 of the 10 of the people are woman. If all 10 are qualified in how many wa

A psychologist is interested in knowing whether adults who were bullied as children differ from the general population in terms of their empathy for others. On

hypothesis testing

F test for comparing two variances is that both populations are normally distributed. Why would validating these assumptions be a matter of statistical ethics?

Compare and contrast the following measures of dispersion (range, standard deviation) in terms of what each of these represent and in terms of the relative adva

Determine the area under the standard normal curve that lies...

Scientific Method: Stating a hypothesis, Collecting data using some sort of sampling plan; Rejecting or not rejecting the hypothesis.

Looking for the Z score

The failure rate in a statistics class is 20%. In a class of 50 students, find the probability that less than eight students will fail.

The result of an exam score for a given class is normally distributed. If the mean score is 85 points and the standard deviation is equal to 20 points, find

Confidence Interval Question

Test statistic and p-value

Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean μ=228 days and standard deviation σ=11 days.

Statistics word problem

Statistics word problem

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