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Explain what is wrong and why it is wrong.
1.If the claim says that the population mean is greater than 200 and the sample mean is 215, we can say that the claim is true even without a formal test. 2.A value of r = 0.851 shows that there is very little linear relationship between the two variables being compared. 3.A value of r = 0.158 shows that there is very little relationship of any kind between the variables being compared.4. If a correlation coefficient of r = 0.642 was found between two variables in a sample of paired data that were measured in feet, the value of r would change by a factor of twelve if the data were converted to inches and r was computed again. 5.Using data from Boston, Massachusetts, a test of independence is run on the claim that ice cream sales per month and the number of car wrecks per month are independent. The claim is rejected.
The number of new contributors to a public radio station's annual fund drive over the last ten years is. Develop a trend equation for this information, and use it to predict next year's number of new contributors.
Find the least squares approximation of e^x over the interval [0,1] by a polynomial of the form ao+a1x. Find the mean square error of the approximation.
What conclusion should be drawn from these results?
Part of $13,750 is invested at 9% annual interest, and the rest is invested at 8%. After one year, the accounts paid $1,160 in interest. How much was invested at the lower rate?
find the general solution of the given differential equation:
Define the x-axis to be along the plane and put the origin at the nearest point to the earth. Assuming the space capsule lands at x0 > 0 with initial velocity zero, what happens to the space capsule?
Determine the probability that a child chosen at random from the school is bussed to school.
Betweenness in taxicab geometry. Let A = (0,0) B = (1,0) and C = (1,1) and let k denote the taxicab metric.
Given a binomial distribution with n = 20 and p = 0.26, would the normal distribution provide a reasonable approximation? Why or why not?
Clyde's Marina has estimated that fixed costs per month are $303,480 and variable cost per dollar of sales is $0.40.
A random variable y has a Rayleigh distribution, if and only if its probability distribution is given by:f(y)=2(alpha)y^(-alpha y^2) , y>0 and alpha>0
A plane flying into a headwind travels 216 miles in 2 hours and 42 minutes. The plane does the return flight in 2 hours. Find the speed of the plane and of the wind.
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