The amount of force needed to slice identical logs are to be measured 36 times under identical conditions, and the sample mean is to be calculated. The population of force requirements has a mean of 27.8 and a standard deviation of 1.85. Calculate the probability that the sample mean will be greater than 27.5. (round to 4.d.p)
1.The amount of force needed to slice identical logs are to be measured 36 times under identical conditions, and the sample
1b. The amount of force needed to slice identical logs are to be measured under identical conditions, and the sample mean is to be calculated. The population of force requirements has a mean of 27.8 and a standard deviation of 1.85. How many measurements are needed to make sure the standard deviation of sample means is less than 0.25?
3. Given that you need to construct a 90% confidence interval, having 12 measurements, and you don't know the value of σ , what would be the correct t -score to use? Find tn−1,α/2 (round to 3 d.p)
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