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You want to determine if your widgets from machine 1 are the same as machine 2. Machine 1 has a sample mean of 500 and a population standard deviation of 6 and a sample size of 18. Machine 2 has a sample mean of 500.5 and a population standard deviation of 2 with a sample size of 2. With an alpha of .05 can we claim that there is a difference between the output of the two machines. Which of the following statements are true?
a. We will reject the null hypothesis and prove there is a difference between the 2 populations.
b. We will not reject the null hypothesis and thus we can't prove there is a difference between the 2 populations.
c. The critical values you will use are 1.96 and -1.96
d. B and C are correct
e. None of the above are correct
Do you use the t-test for this answer? Do the t-test and z-test give different answers?
What is the best first glance prediction you can give the customer about the value of his house given your 2 variable linear regression analysis?
The sample proportion of large gloves for each location is and . (Round your answers to 4 decimal places.)
Modify above problem (Problem 8th) so that each hardware vendor now demands seventy-five (75) units. Any units available from the vendors that are not shipped cost nothing.)
Explain and give examples of how the particular outcomes of a study can suggest if a particular threat is likely to have been present.
The Sony corporation produces a Walkman that requires two AA Batteries. The mean life of these batteries in this product is 35.0 hours. The distribution of the battery lives closely follows the normal probability distribtion with a standard deviat..
The number of arrivals per minute at a bank located in the central business district of a large city was recorded over a period of 200 minutes, with the following results:
At α = 0.10 test the claim that there is a difference in means of the salaries. (a) State the Hypotheses: (b) Compute the Test statistic: (Round off correctly)
In a perfectly symmmetrical distribution: a) the range equals the interquartile range b) the interquartile range equals the mean c) the median equals the mean d) the variance equals the standard deviation
In the North American court system, a defendant is assumed innocent until proven guilty. In an ideal world, we would expect that the truly innocent will always go free, whereas the truly guilty ones will always be convicted.
What percentage of observations of a normal distribution are represented by the mean plus or minus 1.96 standard deviations?
I believe this can be done by plotting out every 3 years average number of people working past 65 since 1997 until now and then making a predictability study as to number of people who will be working over the age of 65 in 2012.
The following frequency distribution reports electricity cost for sample of 50 two-bedroom apartments in Albuquerque, New Mexico during the month of May last year.
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