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MAT120-W02 - Project 1
Generated Feb 17, 2019 by leedhl

1.      List your data set. You may either copy and paste from your Minitab Express worksheet or from your StatCrunch worksheet. If you prefer, you may save and upload your Minitab Express project. Name your variable.

 

Year

Population

1960

180,671,000

1961

183,691,000

1962

186,538,000

1963

189,242,000

1964

191,889,000

1965

194,303,000

1966

196,560,000

1967

198,712,000

1968

200,706,000

1969

202,677,000

1970

205,052,000

1971

207,661,000

1972

209,896,000

1973

211,909,000

1974

213,854,000

1975

215,973,000

1976

218,035,000

1977

220,239,000

1978

222,585,000

1979

225,055,000

1980

227,225,000

1981

229,466,000

1982

231,664,000

1983

233,792,000

1984

235,825,000

1985

237,924,000

1986

240,133,000

1987

242,289,000

1988

244,499,000

1989

246,819,000

1990

249,623,000

1991

252,981,000

1992

256,514,000

1993

259,919,000

1994

263,126,000

1995

266,278,000

1996

269,394,000

1997

272,657,000

1998

275,854,000

1999

279,040,000

2000

282,162,411

2001

284,968,955

2002

287,625,193

2003

290,107,933

2004

292,805,298

2005

295,516,599

2006

298,379,912

2007

301,231,207

2008

304,093,966

2009

306,771,529

2010

309,348,193

2011

311,663,358

2012

313,998,379

2013

316,204,908

2014

318,563,456

2015

320,896,618

2016

323,127,513

 

 

 

 

 

 

 

 

 

 

 

2.      Explain why one should think that your data are credible, reliable and current. (If you decide that the source is not credible, you may still use it for the purposes of this assignment.)

I believe the data is credible since it is using data from the U.S. Census Bureau.

 

 

 

 

 

3.      Explain why one should think that your data are unbiased.

The data can be biased. Not everyone responds to the Census Bureau. Also, it looks like the population data was rounded to the nearest thousand from 1961-1999

 

 

 

 

 

 

 

4.      Cite the source of your data using the APA format. (See page 188, #48, in your textbook for an example of an APA citation.)

Datopian. (n.d.). Population figures for countries, regions (e.g. Asia) and the world. Retrieved February 17, 2019, from https://datahub.io/core/population

 

 

 

5.      Give the mean, standard deviation, and variance of your data

Mean

249,960,271

Standard deviation

5,614,714

Variance

31,525,007,893,813.7

 

6.      Give the five-number summary and IQR of your data

Mínimum

180,671,000 (StatCrunch: 180,671,000)

Q1

212,881,500 (StatCrunch: 213,854,000)

Median

244,499,000 (StatCrunch: 244,499,000)

Q3

288,866,563 (StatCrunch: 287,625,190,)

Maximum

323,127,513 (StatCrunch: 323,127,510)

IQR

75,985,063 (StatCrunch: 73,771,193)

 

 

7.      What outliers are in your data set, if any? Calculate fences and show your work. You may check your work with the box-and-whisker plot in #9.

Outliers

Lower Fence = 212,881,500 – 1.5(78,985,063) = 98,903,906

 

 

 

 

 

no

Upper Fence = 288,866,563-1.5(75,985,063) = 402,844,158

 

 

 

 

Justification

 

 

 

 

No numbers outside of the fence

 

8.      Present a histogram for your data. (You may copy and paste from Minitab or StatCrunch.)

 

 

 

 

 

 

 

 

 

 

 

9.      Present a box-and-whiskers plot for your data. (You may copy and paste from Minitab or StatCrunch.)

 

 

 

 

 

 

 

 

10.  Describe the center, spread, and shape of your data.

Center

 

244,499,000

 

Spread

 

 

 

 

Shape

 

 

 

Skewed Right(Possible Bimodal if there was more data)

 

 

 

 

 

 

 

11.  Conclusion: What have you learned about data and statistical analysis?

 

Result 1: Histogram   [Info]
Right click to copy



Result 2: Boxplot   [Info]
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Result 3: Bar Plot With Data   [Info]
Right click to copy