Sophia Statistics Fundamentals Unit 5 Milestone

Mrs. Pellegrin has weighed 5 packages of cheese and recorded the weights as 10.2 oz, 10.5 oz, 9.3 oz, 9.8 oz, and 10.0 oz. She calculated the standard deviation to be 0.45 oz. The cheese factory lists the package weight at 10 oz. The t-statistic for a two-sided test would be __________.  +0.20  -0.20  -0.40  +0.40 RATIONALE Using the information given, we need to find the sample mean: We now know the following information: Let's plug in the values into the formula: CONCEPT T-Tests 2 A market research company conducted a survey to find the level of affluence in a city. They defined the category "affluence" for males earning $100,000 or more annually and for females earning $80,000 or more annually. Out of 267 persons who replied to their survey, 32 are listed under this category. What is the standard error of the sample proportion? Answer choices are rounded to the hundredths place.  0.32  0.02  1.96  0.20 RATIONALE We can note the SE of the proportion is . If we note that , which means . So if we take all this information we can note SE = . CONCEPT Calculating Standard Error of a Sample Proportion 3 Sukie interviewed 125 employees at her company and discovered that 21 of them planned to take an extended vacation next year. What is the 95% confidence interval for this population proportion? Answer choices are rounded to the hundredths place.  0.11 to 0.16  0.16 to 0.17  0.11 to 0.21