This website uses cookies to ensure you have the best experience. Learn more

Stats Essay

1420 words - 6 pages

Take- Home 1
Chapters 1-4, 6 & Sect. 7.1-7.2

1. xmin=42; xmax=73; sample distribution; find range, midrange, and approximate standard deviation.
Range=highest value-lowest value
73-42=31
midrange= highest value+lowest value2
73+422=57.5
Approx. standard deviation
s=R4
314=7.75

2. Determine whether it is a parameter or a statistic: explaining answers.
a) 22% United Farm Union members
It is a parameter because the measure was obtained by using all the data values from the United Farm Union member population, which is a specific population.
b) Results of survey by Redbook Magazine – 86%
It is a statistic because ...view middle of the document...

Mode of the raw scores:
Mode is the value that occurs most often
Mode = 10

10. Range of the raw scores
R= Highest value-lowest value
R: 15-6 = 9

11. Class width if you have 5 classes:
width= R# of classes
95=1.8 ≈2
12. Complete table of frequency distribution:
Class | ƒ | cƒ | rƒ | crƒ |
6 – 7 | 4 | 4 | .11 | 11% |
8 – 9 | 8 | 12 | .23 | 34% |
10 – 11 | 10 | 22 | .29 | 63% |
12 – 13 | 7 | 29 | .20 | 83% |
14 – 15 | 6 | 35 | .17 | 100% |
35 1.00

13. 35 students; mean score of sample was 33 and ∑(x-)2 = 800. What was variance and standard distribution of his sample?
Variance= ∑(x-)2 n-1
80035-1=23.53
Standard deviation = √s2
23.53=4.85

14. 250 test scores; Sue’s better than 193 of them; what’s her percentile rank?
Percentile = # of values+0.5total # of values*100%

193+0.5250*100%=77.4%
15. Make frequency distribution; CW = 7; include – class limits, midpoints, frequencies, bounds, relative frequencies, and cumulative frequencies.
Classes | Bounds | Midpoints | Frequency | cƒ | rƒ |
101 – 107 | 100.5 – 107.5 | 104 | 2 | 2 | .08 |
108 – 114 | 107.5 – 114.5 | 111 | 3 | 5 | .12 |
115 – 121 | 114.5 – 121.5 | 118 | 7 | 12 | .28 |
122 – 128 | 121.5 – 128.5 | 125 | 8 | 20 | .32 |
129 – 135 | 128.5 – 135.5 | 132 | 5 | 25 | .20 |
25 1.00
16. Frequency Histogram

17. Display data as box and whisker plot.

18. Display data as stem-and-leaf plot
10 | 1 | 5 | 8 | | | | | | |
11 | 1 | 4 | 5 | 6 | 7 | 8 | 9 | 9 | |
12 | 0 | 3 | 3 | 4 | 5 | 7 | 7 | 8 | 8 |
13 | 1 | 1 | 2 | 4 | 5 | | | | |

19. Display the data as an ogive curve.

20. Corresponding z score for test score of 51 if the = 45 and s = 4?
zscore=x-s
51-454=1.5 →.9332

21. popular standard score – T-score = T= +s(z); what is the T-score if raw test score is 57; mean is 55 and SD is 1.45?
zscore=x-s
57-551.45=1.38 →.9162
55+1.45.9162= 56.33

22. What z-score corresponds with 61.9% of area under curve?
61.9% = .6190 → .3029

23. What is the score (nearest whole #) on a test where you score @ P67 if the test has a mean of 57 and SD of 3.7?
P67 = 67% = .6700 → .44
X=Zσ+μ
(.44)(3.7) + 57 = 58.63 ≈ 59

24. Normal distribution; approximate % of population falls:
a) between ±1= 68%
b) above +1 = 15.86%
c) between ± 2 = 95%
d) below – 2 = 2.27%
e) above Q1 = 75%
f) between Q1 and Q3 = 50%
g) Q1 and 1 = 59%

25. random sample of 210 people; mean height = 68 inches and s = 3.1 inches.
a) Heights at ± 1s?
Mean ± S
68+3.1 = 71.7
68 – 3.1 = 64.9
The heights are 71.7 inches and 64.9 inches.

b) how many people will fall between ± 1s?
68% of 210
210* .68 = 142.8 people

c) how many...

Other Papers Like Stats

Populations And Sampling Paper Week 1 Of Stats And Lifesciences

888 words - 4 pages Populations and Sampling YOUR NAME MTH/231 January 14, 2013 Fahad M. Gohar Populations and Sampling A population is the complete collection of all the subjects needed in a study. This can be people, measurements, scores, and so on (Triola & Triola, p. 4, 2006). A population must include every possible subject needed for the study. If not, it is not a population. It can be very difficult to access every subject that is part of the

Glory Road Essay

748 words - 3 pages JOSH LUCAS (DON HASKINS) POSITION: THE COACH STATS: After playing college basketball for Oklahoma A&M, Haskins coached highschool basketball in Texas. He was hired to coach the Texas Western Miners in 1961, winning the NCAA championship in 1966. He later served as assistant coach for the USA Men’s Basketball team at the 1972 Munich Olympics, was enshrined to the Hall of Fame in 1997 and retired in 1999 with an overall record of 719-353

Comparison Prewriting

288 words - 2 pages because I feel that I will get more information about these two NBA players. They are both some well-skilled players that teenagers love even myself. 3) Which pattern of organization do you plan to use in your essay? Why? In the essay the first two will be background information stats. The rest of the essay will be comparing and contrast because you can really see the differences between these two outstanding players. 4) Which

Qa Quiz

1655 words - 7 pages position = 3 (n+1) / 4 = 3 (10+1) / 4 = 8.25 ~ 8 Q3 = 33 IQR = Q3 – Q1 = 33 – 25 = 8 4. CV CV=SX X 100 CV = (5.9 / 30.1) x 100 = 19.6% Events A collection of some possible outcomes. A subset of the sample space PE= n(E)Total e.g. Type | Gender | Total | | Male | Female | | Past Stats | 48 | 36 | 84 | Fail Stats | 11 | 13 | 24 | Total | 59 | 49 | 108 | Simple event : described by a single characteristic. P Past Stats= n

Help Desk I Technician

336 words - 2 pages bandwidth variation, packet loss and jitter. 5. Examine the statistics for the client node. Have the packet drops affected anything on the client that you can tell? It happens the same thing on the client computer. A drop off accurs as well. 6. Examine the Delay stats for the entire network (Global) and for the nodes. Can you see any delay caused by these drops? Based on the stats for the entire network I would say that no delays are noted. 7. Copy this window to your lab report and, in a short paragraph, explain why the congestion window sizes are different in the two scenarios.

Huffman Trucking Driver Log System

1036 words - 5 pages scheduled maintenance programs consistently have a lower cost of ownership. Fetch higher dollars during equipment upgrades” (Everything Tractor Trailer, 2009). The driver and co-driver’s information, date, odometer, and driving stats for each trip is in the Driving Log section of the database. This gives the company an opportunity to do a comparative analysis on driving stats of various drivers. The company can track the average miles covered

Acct

588 words - 3 pages Mean and the zDistribution (Statistics) 1. Press STAT and move the cursor to TESTS. 1. Press 1 for ZTest. 1. Move the cursor to Stats and press ENTER. 1. Type in the appropriate values. 1. Move the cursor to the appropriate alternative hypothesis and press ENTER. 1. Move the cursor to Calculate and press ENTER. Example TI8–2 At the 5% significance level, test the claim that μ > 42,000 given σ = 5230, , and n = 30. The

Week 7 410 Lab Report

386 words - 2 pages and paste it into your answer sheet. (7 points) 2. What do the stats show about the traffic entering the cloud? (7 points) It show that it have a high starting packet send to each other to establish communication. 3. Paste a shot of this screen into your worksheet. (7 points) 4. What do you observe about the packet delay related to the ToS we assigned? (7 points) That they have multiple different delays in the three interface queuing

3-4-50 Paper

572 words - 3 pages not have the time nor energy to exercise regularly enough to stay healthy. And there are people who do not put forth the effort to get in shape, stay in shape, and live longer. * OBESITY STATS Obesity is a disease that affects 34 percent of adults age 20 and over in the United States, which amounts to more than 72 million people. About 32.2 percent of American men and about 35.5 percent of American women are obese. The number of

Com/285

502 words - 3 pages study. The study indicates that laptop computer are the most prevalent technology, with 57.3% of Americans now owning one, up from 42.8% in 2006.” (Mandese, 2009)these stats show exactly how much our world today use these forms of communications in their daily lives let alone for business communication of any kind whether it be communication between a group or a one on one interaction. As the years continue there will only be greater technologies and

Conflict Management

579 words - 3 pages 1. What is conflict? In what ways are managers involved with conflict? The book “Working Through Conflict: Strategies for Relationships, Groups, and Organizations,” written by Joseph P. Folger, Marshall Scott Poole, and Randall K. Stutman, provides a definition of conflict. The text stats that “conflict is the interaction of interdependent people who perceive incompatibility and the possibility of interference from others as a result of this

Related Essays

Stats Essay

9978 words - 40 pages CHAPTER 1 Managerial Accounting ASSIGNMENT CLASSIFICATION TABLE Learning Objectives *1. Explain the distinguishing features of managerial accounting. Identify the three broad functions of management. Define the three classes of manufacturing costs. Distinguish between product and period costs. Explain the difference between a merchandising and a manufacturing income statement. Indicate how cost of goods manufactured is determined. Explain the

Stats Essay

643 words - 3 pages 1. What demographic variables were measured at least at the interval level of measurement? length of labor and number of hours working per week. 2. What statistics were used to describe the length of labor in this study? Were these appropriate? Frequencies, mean and standard deviation were used to describe the length of labor in both experimental and control group. 3. What other statistic could have been used to describe the length of labor

Stats Problems Essay

1802 words - 8 pages 1. The regression analysis at the bottom relates average annual per capita beef consumption (in pounds) and the independent variables "annual per capita pork consumption" (in pounds) and "average annual beef price" (in dollars per pound). 

The coefficient for beef price, -12, tells us that: 1. For every $1 increase in beef price, average beef consumption decreases by 12 lbs, not controlling for pork consumption. 2. 
For every $12 drop

Facts And Stats Essay

1849 words - 8 pages St Vincent is one of the 32 St Vincent & The Grenadines islands, known as Jewels of the Caribbean. Regarded as a sailors’ paradise, the turquoise waters that surround these volcanic isles are considered some of the best cruising grounds in the world and are home to a wonderful array of marine life making it perfect for snorkelling and diving. Still largely untouched by tourism and with its secluded coves and spectacular backdrops of high