Thursday

September 18, 2014

September 18, 2014

Posted by **Richard** on Tuesday, December 6, 2011 at 3:48pm.

a. P x = 14, = 4, n = 5, 90 percent confidence

b. P x = 37, = 5, n = 15, 99 percent confidence

c. P x = 121, = 15, n = 25, 95 percent confidence

Need to show my work/formula

Thanks,

- Math-Statistics -
**PsyDAG**, Tuesday, December 6, 2011 at 4:58pmAssuming two-tailed test, x = mean, D = Standard deviation:

90% = mean 1.645 SEm

SEm = SD/√n = Standard Error of the mean

99% = mean 2.575 SEm

95% = mean 1.96 SEm

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions and their related Z scores.

**Answer this Question**

**Related Questions**

statistics - Use the given confidence level and sample data to find a confidence...

Statistics - Suppose x has a mound-shaped distribution with sigma = 9 . A random...

Statistics - The standard deviation for a population is σ = 15.3. A sample ...

Statistics - You are given the following information obtained from a random ...

Statistics - Which of the following statements correctly interprets a 95% ...

Statistics - Which of the following statements best describes the uncertainty ...

statistics - Consider a 95% confidence interval for a population mean ...

statistics - Consider a 95% confidence interval for a population mean ...

Statistics - Multiple Choice Which of the following statements is true about the...

Statistics - Use the sample data and confidence level to construct the ...