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Petroleum pollution in oceans stimulates the growth of certain bacteria. An assessment of this growth has been made by counting the bacteria in each of 6 randomly chosen specimens of ocean water (of a fixed size). The 6 counts obtained were as follows. 70, 58, 68, 61, 65, 50 Find the standard deviation of this sample of numbers. Round your answer to two decimal places.
Using the 0.05 level of significance, is the average miles-per-gallon rating on the highway for cars using the new engine different from the rating for cars using the old engine?
a local market research company has been hires to collect data about the salaries of recent college graduates. based on
The company wants a strategy that will maximize the expected net present value (NPV) of total cash flow for the next three years, where a 15% interest rate.
In 2004 ACT, Inc., reported that 74% of 1644 randomly selected college freshmen returned to college the next year. Estimate the national freshman-tosophomore retention rate.
1. Suppose the population mean is 3, and you have the following sample: 3, 5, 7. What is the sampling error?
The local municipality claims that since the percentage of intersections that had an accident last year decreased from the prior year, the city is now safer. What are the hypotheses for this situation? Is the city really safer?
An advertisement for the Audi TT model lists the following performance specifications: standing start, 0-50 miles per hour in an average of 5.28 seconds.
How many out of 300 would you expect to have an anxiety disorder if the 18% is correct?
What is the point estimate of the population mean? Using the 95 percent level of confidence, determine the confidence interval for μ.
Find the probability that the number who consider themselves baseball fans is? (a) exactly? five, (b) at least? six, and? (c) less than four.
consider three jars labelled jar 1 jar 2 and jar 3. jar 1 contains one red ball and three green balls. likewise jar 2
Create a scatterplot of Calories vs. Fat.- Interpret the value of R2 in this context.- Write the equation of the line of regression.
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