Letxbe a random variable that represents hemoglobin count (HC) in grams per 100 milliliters of whole blood. Thenxhas a distribution that is approximately normal, with population mean of about 14 for healthy adult women. Suppose that a female patient has taken 10 laboratory blood tests during the past year. The HC data sent to the patient's doctor are as follows.

15 18 16 18 15 13 13 18 15 11

(i) Use a calculator with

sample mean and standard deviation keys to findxands.

(Round your answers to two decimal places.)

x=

s=

Does this information

indicate that the population average HC for this patient is higher than 14? Use=

0.01.

(a) What is the level of

significance?

What is the value of the

sample test statistic? (Round your answer to three decimal places.)