an interval estimate of the population mean, if the population standard deviatio

Question

an interval estimate of the population mean, if the population standard deviation is unknown 12. In developing a. it is impossible to develop an interval estimate b. a sample proportion can be used c the sample standard deviation and 1 distribution can be used d. None of the other answers are correct. 13. From a population that is normally distributed with an unknown standard deviation, a sample of 25 elements is selected. For the interval estimation of u, the proper distribution to use is the a. standard normal distribution b. z distribution c. distribution with 26 degrees of freedom d. t distribution with 24 degrees of freedom 14. A continuous random variable may assume a. all values in an interval or collection of intervals b. only integer values in an interval or collection of intervals . only fractional values in an interval or collection of intervals . all the positive integer values in an interval 5. Given that all other conditions are the same, if level of significance increases, sample size will decrease increase be the same none of above

Explanation / Answer

12) Answer of this question is option c.the sample standard deviation and t distribution can be used.

13) Answer of this question is option d.t distribution with 24 degtrees of freedom.

14) Answer of this question is option a. all values in an interval or collection of intervals.

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