Explanatory variable caused response variable
What is wrong with this statement? High linear correlation proves that the explanatory variable (variable x) caused the response variable (y) to happen.
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A student wanted to construct a 95% confidence interval for the average age of students in her statistics class. She randomly selected 12 students. Their average age was 20.7 years with a standard deviation of 1.2 years. What is the best point est
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A bank wishes to estimate the mean credit card balance owed by its customers. The population standard deviation is estimated to be $297. If a 98 percent confidence interval is used and an interval of $84 is desired, how many customers should be sa
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Compute the population standard deviation for this random variable and use your answer from the previous question in order to complete the following observation: Out of a population of 10000 customers, on average _____ customers make additional pu
Suppose you know that the distribution of sample proportions of the residents of one town over 70 years old in samples of 110 residents is normal with a mean of 0.12 and a standard deviation of 0.03.
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