Suppose a bowler claims that her bowling score is more than 157 points, on average. Several of her teammates do not believe her, so the bowler decides to do a hypothesis test, at a 10% significance level, to persuade them. She bowls 23 games. The mean score of the sample games is 170 points. The bowler knows from experience that the standard deviation for her bowling score is 11 points.

• H0: =157; Ha: >157
• =0.1 (significance level)

What is the test statistic (z-score) of this one-mean hypothesis test?

Select the correct answer below:

1311235.67

1311235.67

1311225.54

1311225.54