Statistics
posted by Cheri .
Trying to finish an assignment: What happens to the power of the z test when the standard deviation increases? and Is the shape of a sampling distribution always the same as that of the null hypothesis population? Thanks!
As the SD increases, the exactness of the estimate of a population mean is less.
The null hypothesis usually assumes a normal distribution. As I mentioned in your later post, assu7ming that the distribution isdue to chance factors, the sampling distribution will approximate a normal distribution more closely as the sample size increases.
I hope this helps a little more. Thanks for asking.
Respond to this Question
Similar Questions

Statistics
Is a sampling distribution always the same as the curve for a null hypothesis? 
Stats
What happens to the power of the z test, when the standard deviation increases? 
Math (Statistic)
Considered the sampling distribution of a sample mean obtained by random sampling from an infinite population. This population has a distribution that is highly skewed toward the larger values. a) How is the mean of the sampling distribution … 
Statistics
The t distribution should be used when ___. the sampling population is not normal the sampling population is unimodal The sampling distribution is normal and the population standard deviation is unknown the population standard deviation … 
statistics
Given a sample size of 38, with sample mean 660.3 and sample standard deviation 95.9 we are to perform the following hypothesis test. Null Hypothesis H0: ƒÊ = 700 Alternative Hypothesis H0: ƒÊ ‚ 700 At significance level 0.05 … 
statistics
An SRS of size n is taken from a large population whose distribution of income is extremely rightskewed and the mean income is calculated. Which of the following statements is false? 
statistics
In performing a hypothesis test, the null hypothesis is population mean = 6.9 and the alternative hypothesis is population mean ≠ 6.9, a random sample of 16 items is selected. The sample mean is 7.1 and the sample standard deviation … 
statistics
For an IQ test, we know the population mean = 100 and the standard deviation =16. We are interested in creating the sampling distribution when N = 64. (a) What does that sampling distribution of means show? 
Statistics
The following is a histogram (right skewed) of the first ten terms of a geometric distribution with p = .4. The mean of this distribution is 2.5 and the standard deviation is approximately 1.93. What's the shape of the distribution … 
Stat
An SRS of size n is taken from a large population whose distribution of income is extremely rightskewed and the mean income is calculated. Which of the following statements is false?