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A random sample of 9 TI-89 Titanium calculators being sold over the internet had the following prices, in dollars. 142 149 147 146 145 148

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A random sample of 9 TI-89 Titanium calculators being sold over the internet had the following prices, in dollars. 142 149 147 146 145 148 154 136 131 Assume the population standard deviation is o = 30 and that the population is approximately normal. Construct a 95% confidence interval for the mean price for all the TI-89's being sold over the internet

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