# Bethel College Confidence Interval and Sample Sizes Essay

**The discussion requires a minimum of 300 words, 3 scholarly sources, including the textbook. Make sure that you use APA style with your references. Under no circumstances use any direct quotes. Any directly quoted or copied material will result in a zero for the assignment. Let’s be sure to write it in own work 100% and give appropriately when using someone’s else work.**

**Reference for textbook attached:**

Mirabella, J. (2011). Introduction to Statistics. Nashville, TN: Savant Learning Systems.

Many times we collect samples of data from a bigger population because the population is too large to use….because of time, cost, and ease. But, the best samples are a true reflection of the bigger population data, making the decisions made from analyzing the sample data effective for the whole population affected. This Unit discussed several different sample types. Please define and then discuss how you might collect each of the following samples from your own organization:

Simple Random Sample

Stratified Random Sample

Cluster Random Sample

Which of the these three would likely give you the best reflection of the population data?

**1,500 word count and there is a total of 3 questions each (not including in-text citation and references as the word count), a minimum of 4 scholarly sources are required in APA format. For the 4 scholarly sources, one from the textbook that’s posted below and the other two from an outside source . Let’s be sure to write it in own work 100% and give appropriately when using someone’s else work. Under no circumstances use any direct quotes. Any directly quoted or copied material will result in a zero for the assignment.**

Reference for textbook attached:Mirabella, J. (2011). Introduction to Statistics. Nashville, TN: Savant Learning Systems.

Use the

Student_Data

which consists of 200 MBA students at Whatsamattu U. It includes variables regarding their age, gender, major, GPA, Bachelors GPA, course load, English speaking status, family, and weekly hours spent studying.

1 You wish to know the average GPA of MBA students at Whatsamatta U. Compute the 95% confidence interval of the mean using the sample of 200 students. Describe your findings.

2 You wish to know the proportion of MBA students that are majoring in Finance. Compute the 95% confidence interval of the proportion using the sample of 200 students. Describe your findings.

3 You wish to learn the average age of an MBA student within 2 years and with 99% confidence. How large of a sample should you get?

4 You wish to learn the proportion of MBA students that are female within 3%, and with 98% confidence. How large of a sample should you get?

Observation #

Data

Observation 1

Observation 2

Observation 3

Observation 4

Observation 5

Observation 6

Observation 7

Observation 8

Observation 9

Observation 10

Observation 11

Observation 12

Observation 13

Observation 14

Observation 15

Observation 16

Observation 17

Observation 18

Observation 19

Observation 20

Observation 21

Observation 22

Observation 23

Observation 24

Observation 25

Observation 26

Observation 27

Observation 28

Observation 29

Observation 30

Observation 31

Observation 32

Observation 33

Observation 34

Observation 35

263000

182000

242000

214000

140000

245000

300000

272000

221000

267000

292000

209000

271000

246000

194000

281000

173000

207000

199000

209000

252000

193000

209000

320000

173000

187000

257000

233000

180000

234000

207000

248000

166000

177000

183000

Confidence Interval Estimate for the Mean

Standard Deviation =

Sample Mean =

Sample Size =

Confidence Level =

Finite Population Size =

43246,60

216710

100

95,00%

—>

200

—>

208233,822

Confidence Interval