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. You measure 36 textbooks' weights, and find they have a mean weight of 30 ounces....

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Basic Math

. You measure 36 textbooks' weights, and find they have a meanweight of 30 ounces. Assume the population standard deviation is 10ounces. Based on this, construct a 90% confidence interval for thetrue population mean textbook weight.

Give your answers as decimals, to two places

Assume that a sample is used to estimate a population proportionp. Find the 80% confidence interval for a sample of size155 with 138 successes. Enter your answer using decimals (notpercents) accurate to three decimal places.

You measure 48 turtles' weights, and find they have a meanweight of 57 ounces. Assume the population standard deviation is13.8 ounces. Based on this, determine the point estimate and marginof error for a 95% confidence interval for the true population meanturtle weight.

Give your answers as decimals, to two places

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