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A random sample of 115 lightning flashes in a certain region resulted in a sample average radar echo duration of 0.86 sec and a sample standard deviation of 0.34 sec. Calculate a 99% (two-sided) confidence interval for the true average echo duration μ. (Round your answers to two decimal places.)
It is known from previous studies that the population variances are 8.1 and 7.3 respectively. Using a level of significance of .01, is there evidence that the out of state students may be receiving lower grades? Fully explain your answer.
Summarize the results of the data analysis.
P (Z ≥ 1.75) where Z is a standard normal distribution with 10 degrees of freedom. Compare this result to the results obtained in parts (a) and (b). How do you explain the difference in these probabilities?
question a dart hits a dartboard that is in the shape of a square with sides of 4m. there are four congruent circles
What statistical test should be used to analyze these data? Identify H0 and Ha for this study. Conduct the appropriate analysis.
Compute the median number of dependents?
An article in USA Today (Elias, June 3, 1999, p. D1) describes a study done by Georgia State University psychologist James Dabbs in which he found that women.
A regression equation was computed to be Y= = 35 + 6X. The value of the 35 indicates that:
ask a new question? assume that womens heights are normally distributed with a mean given by micro 63.9 in and a
Show that the new process is not a Poisson process, e.g., by computing its generating function, or by computing the mean and the variance (which are equal for the Poisson distribution). Find (nevertheless) the probability that the first occurrence..
Use Markov's inequality to find an upper bound on the probability of having more than 200 cars arrive in an hour.
Determine the proportion of variation in grade that can be explained by the linear correlation between the grade and the number of credit hours earned at the same time of taking the course.
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