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Decide if the following random variable is discrete or continuous. Explain your reasoning a) The number of hours spent sleeping each day b) The number of fish caught during a fishing tournament.
How does our worldview shape and filter our concepts, thoughts, beliefs and actions dealing with our relationships and our careers. Include insights on the influence of worldview in what we value
In a study of 420,006 cell phone users, 164 subjects developed brain cancer. Test the claim that cell phone users delevlop brain cancer at a rate that is different from the rate of 0.0340%
A survey of a sample of 342 people is conducted. The survey's respondents are classified according to their political affiliation and their opinon on a bill.
The owner of the brewery does not agree with the refrigerator manufacturer, and claims he can prove that the true mean temperture is incorrect.
Is there sufficient evidence to conclude that there is a linear correlation between altitude and outside air temperatue? Do the results change if the altitudes are reported in meters and the te
Based on these results, does the diet appear to be effective? Does the mean weight appear to be substantial enough to justify the special diet?
Over the first 43 days she was employed at the restaurant, the mean daily amount of her tips was $82.20. At the 0.01 significance level, can Ms. Brigden conclude that her daily tips average more tha
Four separate awards (excellence in academics, excellence in teaching, excellence in departmental service, excellence in outreach) are given to professors in the Department of Mathematics. There are
Calculate a 95% confidence interval for the coefficient of height, and interpret it in the context of the data. One tree sample is 79 feet tall, has a diameter of 11.3 inches, and is 24.2 cubic feet
Describe how you could determine if the fishing is better at Pyramid Lake from a boat or from the shore by creating either an independent or dependent sampling plan.
What if the sample size used were 50, with 2 sigma? What happens to sigma ^p when the sample size is larger? Explain why the lower control limit cannot be less than 0.
Be sure to identify the null hypothesis, alternative hypothesis, test statistic, rejection region, conclusion about the null hypothesis, and a final conclusion that addresses the original claim that
In the actual voting Obama got 50% and Romney got 49.1%. The purpose of this problem is to see if the pole was faulty. To answer this, do the following. Construct a 95% confidence interval for the t
Suppose four people, two men and two women, sit in a row, on chairs marked from left to right 1, 2, 3, 4. Let X be the number of the rightmost chair occupied by a man. Let Y be the number of the lef
A restaurant claims that the standard deviation in the lenght of serving times is less than 2.9 minutes. A random sample of 23 serving times has a standard deviation of 2.1 minutes.
Obtain the sample mean and the sample standard deviation of each of the three samples.Obtain total sum of squares (SST,)treatment sum of squares (SSTR,)and error sum of squares (SSE)by using the def
Let X and Y be independent exponential random variables with means 2 and 3 respectively. Let Z=X+Y. Determine P(2<=Z<=6)
Suppose that the skewness associated with the residuals from a multiple regression of 88 observations is -0.3 and the excess kurtosis is
Let X be a continuous distribution with probability density function: f(x))=2/(x+3)^2 if x>= -2 and f(x)=0 otherwise. Let Y=X^2. Determine P(Y<=4)
Let (X,Y) be jointly distributed random variables with joint density f(x,y)=1/9 for 0<=x<=3 and 0<=y<=x^2. Determine f(X=x given Y=2)
Suppose we wanted to know if people get more nervous before flying in an airplane or taking a ship to their destinations. In other words, are people more afraid of falling from the sky or sinking in
Construct a 95% confidence interval for the true proportion of people who planned to vote for Obama. Using your results from a, tell if the fact that Obama got 50% of the votes cast showed the poll wa
An experiment investigating the effect of exercise on happiness randomly assigns participants to one of four groups : moderate aerobic exercise, strenuous aerobic exercise,