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The value of a stock on the Zimbabwe Stock Exchange observed over a period of 12 days is as follows: 11478 96781031171268672 7386104 a)Find a

The value of a stock on the Zimbabwe Stock Exchange observed over a period of 12 days is as follows:

11478 96781031171268672 7386104

a)Find a 95% confidence interval estimate of the population mean value of stock. [8]

b)Test at 5% level of significance whether the mean value of the stock exceeds $100.[7]

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