QUESTION 1 3.583 points Saved A confidence interval is a range of values within

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QUESTION 1 3.583 points Saved A confidence interval is a range of values within which we are confident (based on the method used to calculate the interval) that the actual value of a population parameter (such as u, the population mean) will fall True False QUESTION 2 3.571 points Save Answer Values from the standard normal (Z) distribution are used most often in practice to form confidence intervals for means because even though the population mean, ?, is unknown, the population standard deviation, o, is usually known True O False QUESTION 3 3.571 points Save Answer Suppose we were to gather a random sample of 27 observations from a population and wished to calculate a 90% confidence interval for the mean, ?, in the case where the population standard deviation,o, is unknown. Enter the value from the Students t distribution that we would use, to three decimal places QUESTION 4 3.571 points Save Answer Suppose we were to gather a random sample of 31 observations from a population and wished to calculate a 95% confidence interval for the mean, ?, in the case where the population standard deviation, ?, is unknown. Enter the value from the Student's t distribution that we would use, to three decimal places

Explanation / Answer

1. false- a confidance interval defines the values of a range, wether the values are in specified parameter or not.

2. false- this value can be calculate by considering these two factors, in this the standard deviation value may or may not be known

3. with this information, we can not calculate

4. it is also not possible to calculate with the given information.

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