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The lifetime of an electronic amplifier is modeled as an exponential random variable. If 10% of the amplifiers have a mean of 20,000 hours and the remaining amplifiers have a mean of 50,000 hours, what proportion of the amplifiers fail before 60,000 hours?
A consumer purchases 12 frozen chickens. What is the probability that the consumer will have more than 6 contaminated chickens?
Two-liter plastic bottles used for bottling cola are shipped in lots of 100. Suppose the lots are 5 percent defective. Some bottles leak, some are too small, and so forth.
You have to determine that your cutoff value at level a = 0.05 is 1.645 when testing whether the mean of a population is significantly different from 1.5. If you calculate a test statistic of 1.8 what is the proper conclusion?
A ball is then selected at random from urn 2. if the ball selected from urn 2 is red, what is the probability that the ball transferred from urn 1 was...(i)red?
What is the advantage of a randomized experiment in which the investigators randomly assign treatment conditions to subject over an observational study in which the subject self-select the treatment groups?
Assume you conducted an ANCOVA that shows both the first IV as well as the covariate signficantly predicts the DV. Create a mock output table that supports the relationship. Report findings APA style.
The mean math score for fifth grade students at Smart Elementary is 90 with a standard deviation of 8. The fifth grade students are tested each year to determine if the mean score remains the same.
What is the probability that exactly 9 of the children are cured? Report your answer to four decimal places, rounding in the usual way?
To test whether the population standard deviation differ significantly using Chi-Square test.
The sample data are summarized by the statistics n = 27, x = 4.6 years, s- 1.9 years.
Romance USA present reported that 11 percent of all books sold are of the romance genre. If a local bookstore sells 316 books on a given day
What is the difference between a randomized ANOVA and a repeated measures ANOVA? What does the term one-way mean with respect to an ANOVA?
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