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Suppose that the following two-way table describes the toys that cats, rabbits and dogs prefer: Toy Cats Rabbits Dogs Ball 31 19 84 Stuffed toy 65 24 48 What percent of animals that prefer stuffed toys are cats?  Give your answer in decimal form (e.g. 0.81).

The Trial Urban District Assessment (TUDA) is a government-sponsored study of student achievement in large urban school districts. TUDA gives a mathematics test scored from 0 to 500 with an average of 250 and a standard deviation of 43.1. Scores for a random sample of 110 eighth graders in Dallas had an average score of 245. Do eighth graders in Dallas score significantly lower than average? Explain your conclusion using full sentences.

The general education department at a local university would like to determine the average math placement score for its students. The first thirty students to take the exam had an average score of 590. It is known that the students’ scores follow a normal distribution and that the standard deviation of all such placement scores is 95. Explain the issue with using z-procedures in this situation. What is the standard deviation of the sampling distribution of

The stemplot below displays percentage of students who have not seen the entire sequence of Harry Potter movies in 30 different departments at University X.       The median percentage is:

The Trial Urban District Assessment (TUDA) is a government-sponsored study of student achievement in large urban school districts. TUDA gives a mathematics test scored from 0 to 500 with an average of 250 and a standard deviation of 43.1. Scores for a random sample of 380 eighth graders in Dallas had an average score of 245. Do eighth graders in Dallas score significantly lower than average? Explain your conclusion using full sentences.

Which of the following lists of numbers has the smallest standard deviation?

The Trial Urban District Assessment (TUDA) is a government-sponsored study of student achievement in large urban school districts. TUDA gives a mathematics test scored from 0 to 500 with an average of 250 and a standard deviation of 43.1. Scores for a random sample of 110 eighth graders in Dallas had an average score of 263. Do eighth graders in Dallas score significantly higher than average? Explain your conclusion using full sentences.

The general education department at a local university would like to determine the average math placement score for its students. The first thirty students to take the exam had an average score of 620. It is known that the students’ scores follow a normal distribution and that the standard deviation of all such placement scores is 85. Explain the issue with using z-procedures in this situation. What is the standard deviation of the sampling distribution of

Suppose that a regression was performed relating the price of homes in San Diego (in $100,000) and the distance to the beach (in miles).  The equation of the regression line was found to be             Price = 10.2 – 0.75 * Distance Based on this information we can conclude which of the following:

Which of the following lists of numbers has the largest standard deviation?