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According to the Department of Education, about 30% of middle school student in USA failed basic math skills test. If randomly 7 middle school students were selected, what is the probability that more than 4 students (5 or 6 or 7) will fail basic math skills test? Use the Appendix Table for Binomial distribution.
What is the probability that the male sample will have at most three more days of absences than the female sample?
A random sample of six students in each school produced the following GRE scores. Assume that the data are normally distributed with equal variances.
Passengers arrive at a train station according to a Poisson process with rate ? and, independently, trains arrive at the same station according to another.
Do the data from the survey support the health organization's assertion? Use a = .05.
a data set consists of 83 test scores. over a long period it has been found that the mean and standard deviation for
A sample of 18 observations taken from a normally distributed population produced the following data.
U.S. Census data for San Luis Obispo County, California, were used to construct the following frequency distribution for commute time (in minutes)
Among the variables high school percentile, ACT English score, ACT math score, and ACT composite score, identify the one that appears to be the best predictor of cumulative GPA. Explain your reasoning.
a statistics practitioner would like to estimate a population mean to within 40 units with 99 confidence given that the
What is an instance in modern America of people following a trend set by the President or a member of the President's family
a. Give the state-transition-rate diagram of the process. b. What is the fraction of time that the switchboard is blocked?
Plot the graphs above on the same scale for each problem. Hint: you need to calculate the minimum and maximum values for both x and y axes
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