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Headlined "False Conviction Study Points to the Unreliability of Evidence," the New York Times ran a story about the study, which "examined 200 cases in which innocent people served an average of 12 years in prison. A few types of unreliable trial evidence predictably supported wrongful convictions. The leading cause of the wrongful convictionswas erroneous identification by eyewitnesses, which occurred 79 percent of the time."
Discuss briefly. Is eyewitness evidence unreliable? What's missing from the story?
A jar contains marbles of different colors: 4 white, 6 black, 6 red, and 4 blue. On two random drawings, without replacement, find the probability that the first is black and the second is white.
Define a critical region that has a significance level of a = 0.05. If the random sample of n = 30 yielded = 3189 and s = 488, what is your conclusion? What is the approximate p-value of your test?
In a distribution of sentence lengths in months like the following: 6, 12, 10, 18, 24, 360; which statistic would a researcher not want to report?
What is the stock's value at it's highest on 15 days of the year? (Assume that there are 240 trading days in a year).
The grades of 20 students are listed in the stem and leaf diagram below. What is the probability of randomly selected student to have a grade more than or equal to 60 and less than or equal to 80.
Assume that the bulb life is normally distributed. At the 10% significance level, do the data provide evidence that the mean life for the company's light bulbs differs from the advertised mean?
The gas price index for 1985 was 218.5 and the gas price index for 2000 was 276.8. If it cost $18.13 to fill your gas tank in 1985, how much would it have cost to fill the same tank in 2000?
a sports league is making up their season schedule. the league has 12 teams with eight teams from la and the rest from
A technician starts a job at a time Y1 that is uniformly distributed between 8:00 A.M. and 8:15 A.M. The amount of time to complete the job, Y2, is an independent random variable that is uniformly distributed between 20 and 30 minutes. What is the..
a weather forecaster predicts that the may rainfall in a local area will be between 1 and 7 inches but has no idea
Use a 95% CI to estimate the difference between the proportions of men and women managers who are married. Interpret the interval and what is the conclusion in terms of the populations from which the samples were drawn.
Statistical Hypothesis testing - Frequency distribution
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