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4. For the following set of sample scores, estimate the population mean within a . 95 confidence interval: 15, 18, 12, 17, 19. 5. A random sample of 61 fifth grade students was selected and given the Stanford-Binet IQ test. The mean score for the sample was 97, with an estimated standard error of the mean of 2.43. Estimate whether the sample mean could be representative of a population whose mean is 100