Zappos fears that the average weight of outgoing orders exceed 6 lbs.A sample of 16 packages are weighted and found to weight 6.14 lbs with a sample standard deviation of 0.4. Use hypothesis testing at the 10% level and select the best answer.

a.

Zappos' statement is incorrect the upper value that defines the DNR region is 6.128.

b.

Zappos is correct because the upper value that defines the DNR region is 6.1341

c.

The null hypothesis is correct because 6.14 fall within the DNR region, having a test value of 1.4 greater than the critical value of 1.28.

d.

The alternative hypothesis is incorrect because 6.14 is less than 6.165.