University of Phoenix Material
Time to Practice – Week One
Part A
Some questions in Part A require that you access data from Statistics for People Who (Think They) Hate Statistics. This data is available on the student website under the Student Test Resources link.
1. By hand, compute the mean, median, and mode for the following set of 40 reading scores:
SUMMARY
31
32
43
42
24
34
25
44
23
43
24
36
25
41
23
28
14
21
24
17
25
23
44
21
13
26
23
32
12
26
14
42
14
31
52
12
23
42
32
34
2. Compute the means for the following set of scores saved as Ch. 2 Data Set 3 using IBM® SPSS® software. Print out a copy of the output. (Please refer to attachment)
Hospital size (number of beds)
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Class interval
Frequency
90–100
12
80–89
14
70–79
20
60–69
24
50–59
28
40–49
29
30–39
21
20–29
15
10–19
17
0–9
12
9. A third-grade teacher is looking to improve her students’ level of engagement during group discussions and instruction. She keeps track of each of the 15 third graders’ number of responses every day for 1 week. This information is available in Ch. 4 Data Set 2. Use IBM® SPSS® software to create a bar chart (one bar for each day).
10. Identify whether these distributions are negatively skewed, positively skewed, or not skewed at all, and why.
a. This talented group of athletes scored very high on the vertical jump task. Positive skew
b. On this incredibly crummy test, everyone received the same score. No skew
c. On the most difficult spelling test of the year, the third graders wept as the scores were delivered. Negative skew
11. For each of the following, indicate whether you would use a pie, line, or bar chart, and why.
a. The proportion of freshmen, sophomores, juniors, and seniors in a particular university
I would use a pie chart because it would show a percentage of designated students in that university.
b. Change in GPA over four semesters
I would use a line because it would show the lineage of the GPA for each semester and it would show a pattern on reasons for the drops of increases in GPA.
c.
I would use a bar graph because it would be easy to follow and understand the information presented.
| One advantage of the chi-square test over most other inferential statistical procedures is that itAnswer
Meathead Purpose Statement: To inform my audience on the proper way to gain muscle. Thesis Statement: As someone who takes fitness seriously, I want to explain the proper way to gain muscle by taking control of your lifestyle habits, diet, and workout routine. Attention Getter: With 2015 being right around the corner, many people around the world are coming up with different New Year’s resolutions. I know many of those people will want to make their health and fitness a priority.
d. What is the expected value of the number of times the SAT is taken? What is your interpretation of the expected value?
I really liked how the information was presented, it was very organized and the tables that were provided made the statistics very clear.
i) average: assume using 4.0 GPA scale to treat those grades, that means A=4, B=3, C=2, D=1, E=F=0. Then the average would be 2.67 (2 d.p.), that is usually considered as
Which scores are important? What do they mean? (Do not just copy and paste your entire section from part A.) This is where you will explain the important scores from the chart.
Ms. A performed in the Below Average range based on her standard score (SS=83; 95%CI=79-87) indicating she performed within the 13th percentile of her peers. This composite consisted of Pseudo Word Decoding and Word Reading tasks. On the Pseudo Word Decoding task, she obtained a score of (SS=83;95%CI=78-88; PR=13%) which fell in the Below Average range. This task measured her ability to decode nonsense words. She was required to read aloud from a list of words. On the Word Reading task, she obtained a score of (SS=88; 95%CI=81-95; PR=21%) which fell within the Average range. This subtest measured her speed and accuracy of word recognition. In this test, she is required to read aloud from a list of words that increases in difficulty.
Table 4 shows mean values, standard deviations, minimum and maximum values, and asymmetry and kurtosis of the administered tests scores.
The data is going to present by pie charts and bar graphs. Because the bar graph can make the demographics easy to appear for the audience, however, the pie chart can clearly shows the proportion of each part. The graphs were label by questionnaire. I were not put in all the data, which is irrelevant will not be
The teacher will create a chart on Promethean Board to group, list, and label the responses from the class.
It is also a ratio Data because there can be a customer buying no item. So, there can be an absolute zero. Moreover, we can also say that 5 items are half of 10
4) Describe how the Mean and Stand Deviations were calculated (HINT: describe the steps in each process) The mean is calculated by summarizing all the results and dividing the result among the number of participants.
Use five of the above summary measures to represent the summary information in a box plot for each variable.
The researcher collected the data in person by visiting the school. The instructions were given to the students; time given was nearly 35 Min to complete the test. The test answers sheets were collected, scored