1Which of the following is true about the sampling distribution of the sample mean?

1Which of the following is true about the sampling distribution of the sample mean?


a.The mean of the sampling distribution is always 碌


b.The standard deviation of the sampling distribution is always s


c.The shape of the sampling distribution is always approximately normal


d.All of the above are true


2Which of the following is not true about the student's t distribution?


a.It has more area in the tails %26amp; less in the center than does the normal distribution


b.It is used to construct confidence intervals for the population mean when the population standard deviation is known


c.It is bell-shaped %26amp;symmetrical


d.As the number of degrees of freedom increases, the t distribution approaches the normal distribution


3The use of the finite population correction factor when sampling without replacement from finite populations will


a.increase the standard error of the mean


b.not affect the standard error of the mean


c.reduce the standard error of the mean


d.only affect the proportion, not the mean1Which of the following is true about the sampling distribution of the sample mean?
1. Which of the following is true about the sampling distribution of the sample mean?





a.The mean of the POPULATION distribution is always 碌


b.TRUE


c.FALSE


d.FALSE








2. Which of the following is not true about the student's t distribution?


a.TRUE


b. FALSE: It is used to construct confidence intervals for the SAMPLE mean when the population standard deviation (technically, VARIANCE) is UNKNOWN.


c.TRUE


d.TRUE








3. The use of the finite population correction factor when sampling without replacement from finite populations will


a.TRUE


b.FALSE


c.FALSE


d.TRUE