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Create your own exercise. Use the Correlation and Regression applet to create your own exercise to explore how the least-squares line behaves when points are moved.
Write a short report explaining what you have done and what you conclude.
What is the sampling distribution of phat, the sample proportion of adults who smoke and in a random sample of 300 adults, what is the probability that at least 50 are smoker.
assume the following discrete distributionxprx0.910.510.1a if this is a correct distribution then what is the prx0.6?b
identify at least one example of probability encountered in everyday life.explain how probability is used in that
She wants to test H0: μ = 0.5 Ha: μ ≠ 0.5 Find the associated P-value. Is the result significant at the 5% level (α = 0.05)? At the 1% level (α = 0.01)?
1. find the area under the standard normal curve between z -1.5 and z 2.5.2. find the area under the standard normal
Do you believe that the variance of the number of cars sold per month before the announcement is equal to the variance of the number of cars sold per month after the announcement?
in linear regression the dependent variable must be
What is the probability that in your random sample of 50 students, between one thirds and two thirds favor the new policy?
Which approach is most preferred and why? Optimistic, conservative, or minimax regret. Also, is establishing the most appropriate approach before analysising the problem important for the decision maker?
consider the sampling designs provided below. for each sampling design indicate whether or not the sampling is flawed.
Given that 30% of US adults are smokers, find the average of the random variable X= # of smokers in a random sample of 50 residents of the USA, also find the variance and standard deviation of X.
A student wants to examine the relationship between anxiety for an examine and the number of hours studied. The data is as follows:
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