Psy/315 Week 2 Worksheet Essay

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

6. Based on questions 3, 4, and 5 is the mean or median a better estimate for the parameter of interest? Explain your reasoning.

11. For each of the following, indicate whether you would use a pie, line, or bar chart, and why.

2. Quantitative because the data given is concrete and generalizations like mean and mode can easily be identified.

Mean would be the most appropriate measure of central tendency to describe this data. This is because the mean is the average of all scores in the data set. If Dr. Williams were to graph the data into a bell shaped distribution, then the mean would be in the center where most of the scores are located. The mean is calculated using all information of the data set, and is the best score to use if you want to predict an individual score.

The top 500 wealthiest people in the world have more wealth than the bottom half

The mean is the sum of all of the data values divided by the number of data values. The median is the middle number in a data set, in ascending order. The mean, 178 pounds, tells us the average weight for a football player at Center Grove high school. The median, 175, tells us the 2nd quartile, which is the “middle” value in a list of numbers. The 5-number summary consists of the minimum value, quartile 1, median, quartile 3, and the maximum value. This is the distribution of the ordered observation divided into 5 different summaries. Our group chose to select this data, the weight of Center Grove football players, because it is Tyler Amaro’s old high school. They recently won the state championship this past fall and this specific data set was sufficient for this project.

d) Normal distribution, it tells us that the data is weighted heavily in the mean with extreme values.

For the data i had only 2 numbers (6667 and 5455) that i had to find for the mean, median, mode and range, Julian had 3 numbers (5000, 6667, and 7500) to find and Ryan had 3 numbers (10000, 8571, and 18571) also. My mean was 5818.6, Julian’s was 6750.2, and Ryan’s was 9485.5. My mode is 5455, Julian’s is 6667, and Ryan’s is 8571. My median is 5454, Julian’s is 6667, and Ryan’s is 9285.5. Last but not least the range of my data is 1212, Julian’s is 2500, and Ryan’s is

Measures of central tendency are scores that  represent the center of the distribution. Three of the most common measures of central  tendency are:

Mean, median and mode are representative values and they are important factors in statistics. As seen in

Average (Mean) = Sum of all members divided by the number of items. Median = Arrange values from lowest value to highest. Pick the middle one. If there is an even number of values, calculate the mean of the two middle values. Mode = Find the value in a data set that

Like Figures 4 and 5, a central value measure should be used to summarise the data in Figure 6, in addition to a rank-ordered data set split where data is divided into four equal parts. This is based upon the data which is asymmetrically slanted to the right, and includes several data points for each category which lie outside of the data range where most of the points lie within.

I got confused as to what quartile I was looking at, I looked at the classes containing the first quartile, instead of the third quartile. The correct class that contains the third quartile is choice (c): 30-40. To figure out the third quartile, we first figure out the median by adding up all the frequency values (13+8+15+7+2+3+1+1= 50), adding that total by one, and dividing by two equaling a median of about 25.5. So, the class that contains the median is 20-30. We then figure out the first quartile or the lower half of the median which is equal to the 25th

The first strategy when solving the statistical problem above is to create a plan to find how many solutions there are for this problem. When starting this plan, the first step is to glean all the relevant clues given in the problem. The important clues described in the statistical problem begin with their only nine people. One person of the nine people has nine pieces of candy. A second person has no candy. Finally, a third person has four pieces of candy because four is the mean and the media of the problem. Gathering information from the data is what Art Costa’s calls his first level of Questioning, which is gathering information (Daws & Schiro, 2008). Students must have a good understanding of mean, median, and mode before solving this type of statistical problem. Median and mode are often easily found Van De Walle, Karp, and Bay-Williams have defined mean in two different conceptual understandings.