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1. Consider a histogram with a u-shaped curve. Where the majority of the data falls at the lower and higher end, with very little data in the middle. Describe how this would a affect the shape of a box and whisker plot.
2. Consider the variable height of a person. Think about the population, and discuss why if a reasonably large sample of people is taken, this variable is likely to be represented by a normal (symmetric) distribution.
More precisely, find K so that P[X > K] = 0.1, where X is the number of revolutions to failure.
a long time ago in a galaxy far far away the average density of stars is 17 stars per cubic parsec a cubic parsec is a
A chi-square test of the statistical significance of the relationship has a p-value of .19. Is this evidence that there is a relationship? What is the justification for this conclusion?
a. Construct a 90% confidence interval for the proportion who can identify their own country on a blank world map.
What is the purpose of partial correlation?- When a path diagram is shown, what information is conveyed by the arrows leading from one variable to another?
By using standard normal table, determine critical value (or values) for= 0.14 right-tailed test.
Could it be stated, at the 95% confidence level, that after and before the spill there was no difference in the chromium level in the stream?
When would you use a hypothesis test for the difference in two population proportions at your place of employment?
a. Based on the title, tell what type of variables (quantitative or categorical) the explanatory and response variables seem to be.
the weights of newborn baby boys in the population of a country follow a normal distribution with a mean of 105.3
Kids again. Find the standard deviation of the number of children the couple in Exercise may have.
Probability 0.15 of a $47,178 profit and probability 0.40 of breaking even (zero profit). What is the expected value of the profit?
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