A housing development can only build on a certain plot of land if can show that the average level of arsenic in the groundwater is less than 63 parts-per-million (ppm). Soil samples are drawn from the site and tested in a lab. The results of the samples (in ppm) are given below. Is there enough evidence to say that the land is ready for development using a level of significance of 1%? You may assume that the level of ground arsenic is normally distributed in the area. Sample Reults: 31 43 72 68 60 10 32 91

Enter the null hypothesis for this test.
H
0
H
0

Enter the alternative hypothesis for this test.
H
1
:
H
1
:

Is the original claim located in the null or alternative hypothesis?

What is the test statistic for the given statistics?

What is the p-value for this test?

What is the decision based on the given statistics?

What is the correct interpretation of this decision?

Using a % level of significance, there sufficient evidence to the claim that the average level of arsenic in the groundwater is less than 63 parts-per-million (ppm).