Sophia Intro to Stats Unit 5 Milestone 5,.

1.5% for each tail. The lower tail would be at 0.015 and the upper tail would be at (1 - 0.015) or 0.985. The value of 0.9850 is actually on the z-table exactly. 0.9850 corresponds with a z-score of 2.17. CONCEPT Confidence Intervals 2 George measured the weight of a random sample of 49 cartons of apples. The mean weight was 45.5 pounds, with a standard deviation of 3. To see if the cartons have a significantly different mean weight from 46 pounds, what would the value of the z-test statistic be? Answer choices are rounded to the hundredths place. -1.17 -0.13 1.17 0.13 RATIONALE If we first note the denominator of Then, getting the z-score we can note it is This tells us that 45.5 is 1.17 standard deviations below the value of 46. CONCEPT Z-Test for Population Means 3 A ball is drawn from a bag of 26 red and 12 yellow balls. The process is repeated 50 times, replacing each ball