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Suppose the points scored from a population of algebra tests are normally distributed with an unknown population mean and a population standard deviation of 5.2 points. A random sample of algebra tests from the population produces a sample mean score of a 88.6 points. = What value of z should be used to calculate a confidence interval with a 95% confidence level? Provide your answer below: 20.10 1.282 20.05 1.645 20.025 1.960 20.01 2.326 20.005 2.576​