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Discuss the differences between statistics as numerical facts and statistics as a discipline or field of study.
A biologist had mice and rats run through a maze and recorded the number that finished the maze successfully and the number that did not. This table lists the results of the study. At ? = 0.05, test
If Romeo arrives first, and Juliet arrives within 20 minutes (they meet each other!), find Romeo's expected waiting time under these conditions.
How do you calculate the Expected frequency for problem in chapter 13, 28 for the introductory statistics text, 8th edition by Weiss? There is no sample size listed to calculate the expected frequen
What would be the slope of this regression line? Would the correlation between x and y be positive or negative? How would you interpret these data in terms of linear regression?
What is the probability that one bit has high distortion and 5 bits have moderate distortion? Determine the probability distribution mean and variance of X. Determine the conditional probability distr
A random sample of 12 joggers was asked to keep track and report the number of miles they ran last week. The responses are: 5.5 7.2 1.6 22.0 8.7 2.8 5.3 3.4 12.5 18.6 8.3 6.6. Compute the three statis
In testing a new drug, researchers found that 20% of all patients using it will have a mild side effect. A random sample of 14 patients using the drug is selected. Find the probability that:
Classify the following as discrete or continuous random variables.
Describe a continuous psychological variable (construct) and a population you would like to study. Then, in your own words, describe the differences between the population, a single sample, and the
Flaws in a certain type of drapery material appear on the average of three in 250 square feet. If we assume the Poisson distribution, find the probability of at most one flaw in 450 Square feet.
A company that supports two different types of computer networks is interested in comparing the mean down time for the two types. A random sample of 12 networks from the first type and another rando
A random sample of 16 light bulbs with a mean operating life of 300 hours and a standard deviation of 45 hours is picked up from a very large shipment of light bulbs known to have a normally distri
The survey of study habits and attitudes is a psychological test that measures the motivation, attitude towards school, and study habits of students. The mean score range for US College students is
Prepare a dotplot of the rates associated with each of the six different minimum deposit requirements, using a common scale
If you were given a large data set such as the sales over the last year of our top 1,000 customers, how would you begin to describe and what might be the benefits of describing the data"?
Lay out the design for two between-subjects experiments: an experiment involving an experimental group and a control group, and
Give an example of a research/statistic study that you encountered this week in your life (outside of this course). This could be something your saw on the news, read about in another course, read i
If you were given a large data set such as the sales over the last year of our top 1,000 customers, what might you be able to do with this data? What might be the benefits of describing the data?
What is the probability of a spinner with 4 even colors landing on the same color 5 or fewer times in 10 spins?
The scores of 12th-grade students on the National assessment of Educational Progress test have a distribution that is N(300,s=35).
What is the probability of selecting a sample of 50 one-bedroom apartment and finding the mean which is at least $6000.
From a well shuffled pack of cards, four cards were drawn( one card at a time) with replacment technique. What is the probability all cards are black.
What is the probability that the average length of a randomly selected bundle is less than 520cm? Also, what is the probability that the average length of a randomly selected rod is less than 520cm.
If the random variable z is the standard normal score and a > 0, is it true that P(z > -a) = P(z < a)? Why or why not? & Find the (two) z-scores that bound the middle 40% of the standar