test statistic X2 =(n-1)s2/ σ2= | (10-1)*0.9/0.4=20.25 |
df =n-1=10-1 =9
Question 16 4 pts Tiu At A paint manufacturer uses a large amount of titanium dioxide....
A paint manufacturer uses a large amount of titanium dioxide. A new vendor claims that its titanium dioxide has a mean of 25 and a variance of 0.4. The manufacturer doubts this and plans a sample study of n=10 shipments to find out if the variance is more than 0.4 with a =0.05. The sample variance came out to be s2 = 0.9. Assume the population distribution is normal. What is the value of the test statistics and degrees of...