Ch.12: Hypothesis Testing: Part 2WorksheetSee all chapters
 Ch.1: Displaying Numeric Data 1hr & 19mins 0% complete Worksheet Ch.2: Measures of Center and Spread 2hrs & 18mins 0% complete Worksheet Ch.3: Probability and Rules 1hr & 44mins 0% complete Worksheet Ch.4: The Discrete Random Variable 53mins 0% complete Worksheet Ch.5: The Binomial Random Variable 1hr & 38mins 0% complete Worksheet Ch.6: Types of Continuous Random Variable Distributions 1hr & 35mins 0% complete Worksheet Ch.7: The Standard Normal Distribution (Z-Scores) 1hr & 22mins 0% complete Worksheet Ch.8: Using The Z-Score 1hr & 24mins 0% complete Worksheet Ch.9: Sampling Distributions: Mean 1hr & 22mins 0% complete Worksheet Ch.10: Sampling Distributions: Proportion 1hr & 31mins 0% complete Worksheet Ch.11: Hypothesis Testing: Part 1 1hr & 42mins 0% complete Worksheet Ch.12: Hypothesis Testing: Part 2 1hr & 43mins 0% complete Worksheet

# Test Statistic: Proportion

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Concept #1: Calculating the Test Statistic for a Sample Proportion

Concept #2: Calculating the Test Statistic for a Sample Proportion: Intro

Practice: UPS claims all orders ship within the same day, but knows that the percentage is actually closer to 95%. Out of a
random sample of 100 items from a particular branch, 90 were shipped within the same day. Is there enough evidence to
conclude that this branch’s proportion of items shipped within the same day is less than expected? Test using a significance
level of 4%.

Practice: AMC Theaters has claimed that, on average, half of the people who attend the theater purchase something
else at the concession stands. A manager gets a bonus if their theater gets a significantly higher proportion of customers to
purchase concessions products than the average theater. Out of 144 randomly selected theater-goers, a theater had 80 of
them purchase concessions products. Can this theater’s manager claim his bonus using an α = .01?

Practice: Physics majors are said to be better candidates for medical school. Out of any science degree, the average
rate for students to apply and get admitted is .55. A random sample of 225 physics ma jors who applied to medical schools
was collected. 142 of these students eventually went to medical school. Is there evidence to suggest that physics majors
have a higher chance of getting into medical school? Use a .10 significance level.