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Describe how these examples differ from one another. Identify what makes flipping a coin and keeping track of tails a binomial experiment.
A set of 50 data values has a mean of 15 and a variance of 25. Find the standard score of a data value = 30. Find P99, P90, and P80 for the ACT scores.
How is a "discrete" variable different from a "continuous" variable? Please give one example of each, and describe how these examples differ from one another.
A game at the state fair has a circular target with a radius of 10.7 cm on a square board measuring 30 cm on a side. Players win prizes if they throw a dart and hit the circular area only. Assume t
Identify the sampling technique used to obtain this sample: A person throws a phone book into the air five times; each time, he selects the tenth number on the page to which it opens.
Determine if this statistical study is descriptive or inferential: A study finds that 18% of consumers prefer brand A to brand B.
Determine if this study is experimental or observational: Researchers monitor the health of smokers and non-smokers.
The average cost of groceries has risen by 4.2% in the last year. Determine if this data is qualitative or quantitative: Home value.
Determine if this is an example of probability or statistics: The average cost of groceries has risen by 4.2% in the last year
In this exercise, practice some techniques and procedures related to regression analysis, using data (more or less) from the Darr and Johns (2003) academic politics study used as part of this module
A researcher wishes to estimate the proportion of college students who cheat on exams. A poll of 490 college students showed that 33% of them had, or intended to, cheat on examinations. Find the mar
Construct a frequency distribution table to organize the following set of data. Construct a grouped frequency distribution for the following 28 scores using a class width of 4.
Classify the following as an example of a nominal, ordinal, interval, or ratio level of measurement, and state why it represents this level: rankings of the top ten best-selling authors.
Is the study observational or experimental? Justify your answer. Classify each of the variables identified in part IV as either attribute or numerical.
Gerald needs to purchase baseballs and bats for his youth baseball league. He will need at least 25 pieces of equipment, but he only has $615 to spend. Baseballs cost $20 each and bats cost $35 each
The pilot's final score s is the average speed minus any penalty points p earned. Write a function to model the pilot's score for a given t and p.
A group of 11 people are going to the movies one Saturday. Adult tickets cost $10.50 each and child tickets cost $6.75 each. If the total cost for admission to the movies is $100.50, how many childr
If the company expects to sell 1,600 microscopes at a fairly uniform rate throughout the year, determine the number of production runs that will minimize the company's overall expenses.
Determine the economic order quantity, that is, the order quantity that minimizes the inventory cost.
Determine the economic order quantity that minimizes the inventory cost, and then and the minimum inventory cost.
Now, suppose that the company currently has 180 units in stock, and it will not be receiving any further shipments from its supplier for at least 3 weeks. What is the probability that the company wi
Obtain normal probability plots, boxplots, and the standard deviations for the two samples.
In 2000, 27.7% of incoming freshmen characterized their political views as liberal, 51.9% as moderate, and 20.4% as conservative. For this year, a random sample of 500 incoming college freshmen yie