STAT230 8 Week QUIZ

Quiz 1_Stat230:You must use the TFE Editor to present your answers. Download the Quiz and post youranswers via the Assignment Folder.For question #1, a typical row for the Stem & Leaf plot might look like 30269. Where, thevertical line is obtained by using Shift & | key. The line is inserted at the location of thecursor.Submit quiz via the Assignment Folder(15%) 1. A survey of the number of calls received by a sample of Southern Phone Companysubscribers last week revealed the following information.52 43 30 38 30 42 12 46 39 37 34 46 32 18 41 5a) Develop a stem-and-leaf chart. Above for tips on presenting Stem-Leaf plot.b) What basic conclusions can be drawn from this chart?c) Compute the 5 number System for this data set and list Xmin,Q1,Q2,Q3 & Xmax. SeeVideos and show how the pointer was computed for each quartile.(15%)2. For the following table, what is the value of :a) P(A1)b) P(B1A2)c) P(B2 and A3). Compute this as P(B2)*P(A3 B2) . Rows are B1 & B2: columns are A1, A2& A3.What are the values of P(B2) , P(A3|B2) and P(B2&A3)?In what row and column will you find this answer?Second EventA1B1B2Total213First EventA2123A3Total3146410(15 pnts.)3. The chart below gives the percentage of counties in the US that use various methods forrecording votes in 1980 & 2002. Set up side-by-side bar charts by year using the instruction forSide-By-Side Charts in the Class Notes Conference. Copy/Paste your Chart into the TFEEditor from EXCEL.METHODPunch cardsLever machinesPaper ballotsOptical scanElectronicMixed198018.536.740.70.80.23.1200215.510.610.543.016.34.1(15 pnts.)4. The following are a sample of the weights of nine jars of peanut butter.7.69 7.72 7.80 7.86 7.90 7.94 7.97 8.06 8.09a) Compute the median weight.b) Compute the standard deviation of the sample using the shortcut formula. Show the formulaand values for each term and compute the answer. Use the TFE Equation Editor.c) Compute the 5 Number System for this data. Just list the values as Xmin=xxx,Q1=xxx,Q2=xxxx,Q3=xxxxx, Xmax = xxxx.d) Are there outliers? An outlier value is defined as unusually large or small according to theexpressions: Answer yes or no.Outlier > Q3 + 1.5(Q3-Q1) or,Outlier < Q1-1.5(Q3-Q1)(15 pnts.)5. Answer questions a. through f. of 3.23 below.Show work for part f. only.(15 pnts.)6. Compute the mean and standard deviation for the data in the table below. State yourassumptions and show all calculations. See Video- Mean & Variance for Grouped Data inVideos Topics In Stat 230(1) conference.DistanceFrequency0 to 55 to 1010 to 1515 to 2020 to 2541527186(10%)7. A box contains 3 red balls and 4 green balls. If two balls are randomly selected in sequence,what is the possibility that a red ball and a green ball are picked out of the box. State the rulefor P(A&B) and then substitute the values and compute the answer.