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Researcher A finds a significant relationship between increasing stress level and ability to concentrate. Researcher B replicates this study but finds a non-significant relationship. Identify the statistical error that each researcher may have made?
To get a C in history, Nandan must average 74 on four tests. Scores on the first three tests were 69, 74, and 65. What is the lowest score that Nandan can get on the last test and still receive a C?
A pair of dice is rolled. The sum of the faces on top is observed. What are the expectation, variance, and standard deviation of the observed sum? The Expectation and Variance Template attached to the main posting is optional and recommended.
in the linear programming formulation of the shortest route problem there is one constraint for each node indicatinga.
Find the 90% confidence interval for the mean, variance, and standard deviation for the price in dollars of an adult single-day ski lift ticket.
hypothesis testing show all steps. null and alternate hypothesis diagram critical value test statistic reject or do not
Misses the dart board with probability 0:02, what is the probability that seven throws will result in no bull's-eyes, no triples, a double twice, and a complete miss once?
In a sample of 855 bartenders, 48% heard complaints from persons about work. If the margin of error was 4.4%, what was the confidence level that was used?
what is the relationship between management science and the systems
When using the normal distribution (empirical rule) to obtain the bounds for a 99.73 percent of the values in a population, the interval generall will be _________________ the interval obtained for the same percentage if Chebyshev's theorem is ass..
consider two random variables x and y. suppose that the variance of x is 20 that this of y is 10 and that the
A manufacturer produces a batch of memory chips (RAM) and measures the mean-time-between-failures (MTBF). The manufacturer then changes a manufacturing process and produces another batch and again measures the MTBF.
the number of traffic accidents that occur on a particular stretch of road during a month has a distribution with mean
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