Which of the following is not a requirement for the two sample test of means for independent samples?Question 5Select one:a.Equal sample samplesb.Normal populationsc.Equal population samplesd.Equal population standard deviations

When conducting inference about the difference between two population means, which of the following assumptions is NOT required?a.Independence of observations within each sampleb.Normality of the populations being comparedc.Equality of population variancesd.Random sampling from the populations

The mean of the all the sample means and the population mean willQuestion 6Select one:a.None of theseb.Characterized by the standard error of the mean.c.Always be equal. d.Always be normally distributed.

If many samples are taken from the same population, their means will be different.Question 7Select one:TrueFalse

The difference between the sample mean and the population mean is calledQuestion 12Select one:a.Standard error of the meanb.Population meanc.Population standard deviation.d.Sampling Error

Suppose we take repeated random samples of size 20 from a population with a mean of 60 and a standard deviation of 8. Which of the following statements is true about the sampling distribution of the sample mean (x̄)? Check all that apply. The distribution is normal regardless of the shape of the population distribution, because the sample size is large enough. The distribution will be normal as long as the population distribution is normal. The distribution's mean is the same as the population mean 60. The distribution's standard deviation is larger than the population standard deviation of 8.