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Score on last attempt 0.5 out of 1 (parts: 0.5/0.5, 0/0.5) Score in gradebook 0.5 out of 1 (parts: 0.5/0.5, 0/0.5) Try another similar question, reattempt last question below, or select another question. You measure 35 turtles weights, and have a mean weight of 75 ounces. Assume the population standard deviation i find they 9.4 ounces. Based on this, construct a 90% confidence interval for the true population mean turtle weight. Give your answers as decimals, to two places ounces 75 Points possible: 1 Unlimited attempts. 0), Out of: (0.5, 0.5) Score on last attempt: (0.5, 0), Score in gradebook: (0.5, Message instructor about this question e

Explanation / Answer

Mean weight of population = Mean weight of sample xbar

Here population standard deviation is given so we will use Z - statistics

90% confidence interval = xbar +- Z (90%) (/n)

Here for 90% confidence interval Z - value = 1.645

= 75 +- 1.645 * ( 9.4/ 35)

so the standard error part = 1.645 * 9.4/ 35 = 2.61 Ounces

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