Question

Listed below are the lead concentrations μ​g/g measured in different traditional medicines. Use a 0.05 significance level to test the claim that the mean lead concentration for all such medicines is less than 13 μ​g/g.Assume that the lead concentrations in traditional medicines are normally distributed.

8 22 15 .5 8.5 3.5 10 6.5 13.5 5.5 11 

1.Determine the test statistic (round two decimal)

2.Determine the P-value( round three decimal)

3.State the final conclusion that addresses the original claim  

     

    

6.56.5     

13.513.5     

5.55.5     

1111

Answer 1

	x	x-x̅	(x-x̅)2
	8	-2.4	5.76
	22	11.6	134.56
	15.5	5.1	26.01
	8.5	-1.9	3.61
	3.5	-6.9	47.61
	10	-0.4	0.16
	6.5	-3.9	15.21
	13.5	3.1	9.61
	5.5	-4.9	24.01
	11	0.6	0.36
Total=	104		266.9
mean= x̅	10.4