Wednesday

October 22, 2014

October 22, 2014

Posted by **Nadine** on Sunday, March 10, 2013 at 1:30pm.

Determine which test statistic you will use: the standard normal distribution, or the student’s t distribution. Explain why you chose this test statistic.

Establish the null and alternative hypotheses, state the claim.

Test the claim at and discuss your results, should you reject or not reject the null hypothesis, should you reject or except the claim.

- Statistics -
**MathGuru**, Monday, March 11, 2013 at 7:30pmTry a t-test since your sample size is rather small.

Formula:

t = (sample mean - population mean)/(standard deviation divided by the square root of the sample size)

sample mean = 8.2

population mean = 7.3

standard deviation = 1.4

sample size = 20

Plug in the values and calculate the t-test statistic.

Find the critical value for a one-tailed test using degrees of freedom (df = n - 1). Use a t-table. Compare to your t-test statistic calculated above. If the t-test statistic exceeds the critical value from the table, reject the null. If the t-test statistic does not exceed the critical value from the table, do not reject the null.

I hope this will help get you started.

**Answer this Question**

**Related Questions**

intro to statistics - "Working Mom’s Journal" reported that the mean time a ...

Statistics - The daily sales at a convenience store have a mean of $1350 and a ...

statistic - The amount of time a bank teller spends with each customer has a ...

Statistics - A study in Orlando, Florida claimed that the mean commute time for ...

Math - The daily sales at a convenience store have a mean of $1350 and a ...

statistics - Hello!! A survey indicates that for each trip to the supermarket, a...

Statistics - A study in Orlando, Florida claimed that the mean commute time for ...

statistics - A study in Orlando, Florida claimed that the mean commute time for ...

statistics - A random sample of size 81 is taken from a large population, ...

statistics - 1. A random sample of size 49 is taken from a large population, ...