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mathematics
december 2019
06

Mathematics Questions and Answers December 06, 2019

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The manager of a coffee shop wants to know if his customers' drink preferences have changed in the past year. He knows that last year the preferences followed the following proportions - 34% Americano, 21% Cappuccino, 14% Espresso, 11% Latte, 10% Macchiato, 10% Other. In a random sample of 450 customers, he finds that 115 ordered Americanos, 88

You work for a firm that has invested heavily in an advertising campaign to increase sales at its stores this year, and you are tasked with evaluating whether to continue the campaign. In previous years, sales growth has averaged 5% per year across its 42 stores, with a standard deviation of 1.8%. This year, sales increased by 5.5% on average in

Homework: Section 5.4 Question 1, 5.4.3 Suppose that E and F are two events and that P(E and F) = 0.2 and P(E) = 0.4- What is P(FIE)? P(F|E) = E] (Type an integer or a decimal.)

A teacher wants to find out whether her new method of teaching is effective or not. She decides to compare the exam grade from the current semester from the exam grade from previous semesters. She calculates her t score for the current semester to be .39. What can she conclude from this study? Group of answer choices She needs to reject the null

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