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The amount of time it takes anyone to figure out who the killer is in a one- hour episode of Columbo is normally distributed with mean 16 minutes and standard deviation 4.6 minutes.Q. What is the probability that a randomly selected person will figure out the killer within the first 20 minutes?Q. What is the probability that a randomly selected person will still not know who the killer is at the end of the episode?
consider n independent flips of a coin having probability p of landing on heads. say that a changeover occurs whenever
Why use the Wilcoxon T test. What is the hypothesis statements you used? Consider do we prefer working with dependent samples or independent samples? Explain
Heights of 18-year-old men are approximately normally distributed, with mean 68 inches and standard deviation 3 inches.
q1 define what the chi square distribution is. why do you use the chi-square statistic? what type of data is used
In a study designed to test the effectiveness of acupuncture for treating migraine, 142 subjects were treated with acupuncture and 80 subjects were given a sham treatment. The numbers of migraine attacks for the acupuncture treatment group had a m..
What sample size would be needed to obtain an error of +/- 10 square millimeters with 99% confidence?
State your hypothesis, draw your curves, label your critical values and your test statistic, state your decision to accept or reject and write your conclusion in the language of the problem. Use a=0.05.
Which confidence interval has the most variability?
What percentage of the variation in their scores on the second round can be explained by their scores on the first round?
The annual salary of an electrical engineer is given in terms of the years of experience by the table below. Find the equation of linear regression for the above data and obtain the expected salary for an engineer with 45 years of experience.
Internet is 13.4 hours per week, with the sample standard deviation of 6.8 hours. Determine the 95 percent confidence interval for mean time Wired subscribers spend on Internet.
A pH level of the soil between 5.3 and 6.5 is optimal for strawberries. To measure the pH level, a field is divided into two lots. In each lot, we randomly select 20 samples of soil.
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