Mm207 Mid Term

1. For the following scores, find the mean, median, and the mode. Which would be the most appropriate measure for this data set?

So, we have a distribution with a mean of 20,000 and a standard deviation of 5,102.

2. In order to determine the average amount spent in November on Amazon.com a random sample of 144 Amazon accounts were selected. The sample mean amount spent in November was $250 with a standard deviation of $25. Assuming that the population standard deviation is unknown, what is a 95% confidence interval for the population mean amount spent on Amazon.com in November?

(2) Give that a sample of 25 had x = 75, and (x-x)² = 48 the mean and standard

4. Calculate the following measures of central tendency for the set of cube measurement data. Show your work or explain your procedure for each.

5. Give the standard deviation for the mean and median column. Compare these and be sure to identify which has the least variability?

10. Identify whether these distributions are negatively skewed, positively skewed, or not skewed at all, and why.

First we find E by doing Zc(standard deviation/square root of number of trials.) Now we add and subtract that number from the mean income to find both endpoints. The Zc of 95% is 1.96 so we would do

5) Describe how the normal range for any given measurement is obtained. Explain why published values for normal ranges may differ and why these values must be continually checked and updated.

The mean birth weight of infants born at a certain hospital in the month of April was 128 oz. with a standard deviation of 10.2 oz. Which of the following is a correct interpretation of standard deviation?

5. Give the standard deviation for the mean and median column. Compare these and be sure to identify which has the least variability?

2. For the following set of scores, fill in the cells. The mean is 74.13 and the standard deviation is 9.98.

Fry Brothers heating and Air Conditioning, Inc. employs Larry Clark and George Murnen to make service calls to repair furnaces and air conditioning units in homes. Tom Fry, the owner, would like to know whether there is a difference in the mean number of service calls they make per day. Assume the population standard deviation for Larry Clark is 1.05 calls per day and 1.23 calls per day for George Murnen. A random sample of 40 days last year showed that Larry Clark made an average of

Your Project Outline assignment has a Peer Review element to it, and because we only have one student in this course (you), we will need to adjust our approach to ensuring this requirement is met per this course. As we discussed in class, be sure to review your work with either someone in the field, or a classmate who is at least a Senior in this GCU Tech Program. Subsequently, share their feedback in this main forum and incorporate it into your assignment deliverable as well.

An early unit testifies the Z score times the standard deviation divided by the square root of the sample size. Therefore, the Z score remains known as plus/minus of the level of confidence based on the data in the normal distribution. Through likeness, the standard deviation remains characterized as a typical distance of an observation from the distribution center or middle value (Barde & Barde, 2012). In other words, the diagram exhibits a standard deviation of 0.301 for male students and 0.287 for the female students. The results computed display a standard error of 0.04 overall (for both groups). Consequently, the diagram analysis offers a computing test statistic of -4.54. In addition, the direction of the test includes three different areas of study. The first exists as a two-tailed test, the second as the upper-tail test, and the last as the lower-tail test. The chart computes the two-tailed test lower critical value of -1.9600, the upper-tailed test not available and the lower-tail test yielding a -1.6449.