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Suppose the data represent the inches of rainfall in April for a certain city over the course of 20 years. Determine the quartiles. Compute the interquartile range, IQR
The number of traffic accidents in a city during one hour follows a poisson distribution with mean 3 accidents per hour.
Express the problem as a Markov Chain. Determine the expected gain of loss after the die is rolled 5 times
Formulate this problem as a linear programming model. Be sure to include the objective function and all relevant constraints. Use your favorite method to solve this problem and tell me what
Is there convincing evidence that more than three-quarters of U.S. adults believe that rudeness is a worsening problem? Test the relevant hypotheses using a significance level of 0.05. (For z give
Let Y1, Y2, Y3, and Y4 constitute a random sample of size n = 4 from a Bernoulli population with parameter p. (a) Determine whether Y = 2Y1 +Y2 +Y3 +Y4 is sufficient for p. (b) Determine whether Y
The mean points obtained in an aptitude examination is 124 points with a variance of 400. What is the probability that the mean of the sample would differ from the population mean by less than 2.9 p
A health researcher is interested in determining whether or not the speed at which people walk is related to their cholesterol levels. He picks 100 adult volunteers at random, checks their cholester
Find the sampling distribution (theta) of the proportion of fresh engineering graduates who started with an annual salary of less than $40,000.
A newspaper found the mean price for Redwood City homes is $927,200. With 18 homes sold in the past month, the mean for this sample was $998,361.11 and the sample standard deviation was $282,186.83.
State the null and alternative hypotheses. State the distribution that you will use. Find the test statistic and use the appropriate variable.
A professor has recorded exam grades for 10 students in his class, but one of the grades is no longer readable. If the mean score on the exam was 81 and the mean of the 9 readable score is 84, what
On a sample of 30 women and 20 men, 12 men like footbaill, while 15 men like football. Is there evidence for gender difference?
You are the member of a commission that studies the gender inequalities. From a survery, you obtain that, on a random sample of 40 managers, 12 are females. Knowing that the employment share is 45%
If we assume the proportion does not change what should be the sample size in order to reject the null hypothesis (in case it were not rejected)?
Your company produces metal rods. They are required to be exactly 100cm long. From a quick survey, you find that, in a sample of 6 rods , the length is 99, 98, 99, 100, 98,100. Draw your conclusions
The following problem should be answered in R. Any answers (partial or complete) would be greaty appreicated! Generate 50 normal distributions with mean= 15 and standard deviation= 3 with a sample s
On a sample of 40 women and 60 men, 24 women like shopping, while 28 men like shopping, is there evidence for gender differences?
A survey is conducted to verify whether there is a connection between smokers and cardiovascular diseases. 35 over 60 persons with cardiovascular problems are smokers. Can we conclude that the major
A dean of men wishes to estimate the average cost of the freshman year at a particular college correct to within $260, with a probability of 0.95. If a random sample of freshmen is to be selected an
Suppose you wish to estimate the difference between the mean acidity for rainfalls at two different locations, one in a relatively unpolluted area and the other in an area subject to heavy air pollu
Draw the power curve and compute the probability of concluding the workers are not up to par for some actual population means in the alternative set.
Consider the type of clothes dryer (gas or electric) purchased by each of ve di erent customers at a certain store.
At the conclusion of the selection process, what is the probability that the numbers of red and green balls in the rst box are identical to the numbers at the beginning?
The poll results show that 12% of the men and 33% of the women fear flying. After constructing a contingency table that summarizes the data in the form of frequency counts, test the claim that gende