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In the U.S., there are two sources of national statistics on crime rates: (i) the FBI's Uniform Crime Reporting Program, which publishes summaries on all crimes reported to police agencies in jurisdictions covering virtually 100% or the population; (ii) the National Crime Survey, based on interviews with a nationwide probability sample of households.
In 2001, 3% of the households in the sample told the interviewers they had experienced at least one burglary within the past 12 months. The same year, the FBI reported a burglary rate of 20 per 1,000 households, or 2%. Can this difference be explained as chance error? If not, how would you explain it? You may assume that the Survey is based on a simple random sample of 50,000 households out of 100 million households.
Estimate the population proportion of students who were very dissatisfied (code 1) or moderately dissatisfied (code 2) with parking facilities on campus. Use a 90%o confidence level.
the length of time it takes college students to find a parking spot in the library parking lot follows a normal
A research study reports t(14) = 2.17. How many individuals participated in the study? Is this t statistic sufficient to reject the null hypothesis using a two-tailed test with alpha = 0.05?
Can researcher conclude that humidity has significant effect on eating behavior? Use two-tail test with α = .05. Calculate estimated Cohen's d and r2 to measure size of treatment effect.
Show all work, including justification for using the approximate model to find this probability. You may upload a picture as part of your supporting work if you wish.
the kirschner company has a contract to produce garden hoses for a customer. kirschner has 5 different machines that
question 1 a continuous random variable y has py gt 10 0.16 and p5 le y le 10 0.15. finda py lt 10b py lt 5c py
Would you agree with this claim if the random sample showed an average of 23,500 km and a standard deviation of 3,900 km? Use 0.01 level of significance.
given the following hypothesesh0 mu 400h1 mu ne 400for a random sample of 12 observations the sample mean was
If we were to repeat an experiment a large number of times and calculate a statistic such as the mean for each experiment, the distribution of these experiments would be called?
suppose that you are in a class of 33 students and it is assumed that approximately 14 of the population is
eleven chairs are numbered 1 through 11. four girls and seven boys sit on these chairs at random. what is the
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