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Suppose that the distribution of speeds at an interstate highway location is bell-shaped with a mean of 71 mph and a standard deviation of 5 mph. Use the Empirical Rule to complete each sentence:
a. About 68% of vehicles at this location travel between and mph.
b. About 95% of vehicles at this location travel between and mph.
c. About 99.7% of vehicles at this location travel between and mph.
explain how various factors determine the width of confidence intervals. indicate how changes in these factors affect
an estimate of a population parameter that provides an interval of values believed to contain the value of the
Use the given data to find the best predicted value of the response variable.Eight pairs of data yield r = 0.708 and the regression equation y = 55.8 + 2.79x. Also, mean y = 71.125. What is the best predicted value of y for x = 5.7?
The probability of selecting each of the roads are the same. It is 1/3. If the prisoner succeeds on her escape, what is the probability that she made good on her escape by using road b.
What is the accounting equation? Suppose your company sold $12,000 in merchandise to a customer for cash. How does this transaction impact the accounting equation?
A food snack manufacturer samples 13 bags of pretzels off the assembly line and weighs their contents. If the sample mean is 14.7 oz. and the sample standard deviation is 0.50 oz., find the 95% confidence interval of the true mean.
If J&B reduces the calendar price to $1 at the end of July and can sell all surplus calendars at this price, how many calendars should be ordered?
State the null and alternative hypotheses to be tested. Compute the test statistic. Determine the critical value for this test at the 0.05 level of significance. What do you conclude?
Since over 10,000 students in his state took the Math SAT, he can show that the P-value for testing whether the mean score in his state is more than the national average of 480 is less than 0.0001. What we can conclude from this?
Test the equality of the means of three populations.
the average salary of a male full professor at a public four-year institution offering classes at the doctoral level is
What is the difference between research questions and research objectives
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