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Consider the following number of defective circuit boards produced by two different machines on seven randomly selected days.
Machine DefectsA 2 3 7 4 5 1 0B 2 3 4 3 4 2 4
a) To three decimel places what is the mean of machine A?b) To three decimel places what is the mean of machine B?c) To 2 decimel places, what is the variance of machine A?d) To two decimel places what is the variance of machine B?e) To two decimel places, what is the standard deviation of machine A?f) To two decimel places, what is the standard deviation of machine B?g) Select the statement that best describes the machines.
- Can not compare, because there is not enough info- Machine A is Better than machine B- Machine B is Better than machine A- Machine A is the same as machine B
Explain the difference between multiple independent variables and multiple levels of independent variables. Which is better?
In light of these data, are the percentages of divorcing couples with prenuptial agreements equal in these four places?
Perform a posthoc test that is suitable if we assume that group 7 is a control group and that the other are different treatment groups and that we are only interested in finding significant treatments, not to compare them.
Assume that a 95% confidence interval for the mean is 14.5
A random sample of size 25 is taken from a normal population having a mean of 80 and a standard deviation of 5. A second random sample of size 36 is taken from a different normal population having a mean of 75 and a standard deviation of 3.
I survey 50 potential consumers regarding their interest in the product, 34 express an interest in purchasing it. The maximum price each would be willing to pay is shown below.
Assume that for population of students at school, distribution of x is well approximated by normal curve with mean 48 min and standard deviation 4 min.
Confirm that these statements are accurate by finding the geometric mean rate of increase.
Find the standard deviation and variance from the (population) data below. Describe your results.
A study was conducted to determine whether magnets were effective in treating pain. The valves represent pain measurements.
What is the expected shape of the distribution of the sample mean?
Find out the finite population correction (FPC).With a population size of 1,000 and a planned sample size of 200, what is the finite population correction.
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