Question: Data analysis: individual variables. The following table gives data on market share, number of accounts, and assets held by 10 online stock brokerages.8 Brokerage Market

Data analysis: individual variables. The following table gives data on market share, number of accounts, and assets held by 10 online stock brokerages.8 Brokerage Market share Accounts Assets Charles Schwab 27.5 2500 219.0 E* Trade 12.9 909 21.1 TD Waterhouse 11.6 615 38.8 Datek 10.0 205 5.5 Fidelity 9.3 2300 160.0 Ameritrade 8.4 428 19.5 DLJ Direct 3.6 590 11.2 Discover 2.8 134 5.9 Suretrade 2.2 130 1.3 National Discount Brokers 1.3 125 6.8 Market share is expressed in percents, based on the number of trades per day. The number of accounts is given in thousands, and assets are given in billions of dollars. DATADATA DATADATADATA DATADATADATADATADATA DATADATADATADATADATA DATADATADATADATADATA DATADATADATADATADATA DATADATADATADATADATA DATADATADATADATADATA DATADATADATA DATADATADATADATADATA DATA FILE BROKERAGE

(a) Make a table giving the mean, the standard deviation, and the five-number summary for each of these variables.

(b) Use stemplots or histograms to make graphical summaries of the three distributions.

(c) Describe the distributions. Are there any unusual observations?

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