Question

The sample mean, x?, is 25 g. The estimated standard deviation, s, is 4.5 g. The sample size is 15 and the weights are normally-distributed. Calculate a 90% two-sided confidence interval for a future random weight from this population, rounded to two decimal places. 1. Upper confidence interval limit = 4.5 2. Lower confidence interval limit = 25

          The sample mean, x?, is 25 g. The estimated standard deviation, s, is 4.5 g. The sample size is 15 and the weights are normally-distributed. Calculate a 90% two-sided confidence interval for a future random weight from this population, rounded to two decimal places.

1. Upper confidence interval limit = 4.5

2. Lower confidence interval limit = 25

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The sample mean, x?, is 25 g. The estimated standard deviation, s, is 4.5 g. The sample size is 15 and the weights are normally-distributed. Calculate a 90% two-sided confidence interval for a future random weight from this population, rounded to two decimal places.

1. Upper confidence interval limit = 4.5

2. Lower confidence interval limit = 25

Added by Juan Carlos V.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

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Solved by Expert Kari Hasz

09/19/2023

Step 1

We can use the formula: SEM = $ / sqrt(n) where $ is the estimated standard deviation, and n is the sample size. Plugging in the values, we get: SEM = 4.5 / sqrt(15) = 1.16 Next, we need to find the critical value for a 90% confidence interval. Since this is a Show more…

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The sample mean, x̄, is 25 g. The estimated standard deviation, s, is 4.5 g. The sample size is 15 and the weights are normally-distributed. Calculate a 90% two-sided confidence interval for a future random weight from this population, rounded to two decimal places. 1. Upper confidence interval limit = 4.5 2. Lower confidence interval limit = 25

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