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Question: The Central Limit Theorem does not specify what is meant by "a sufficiently large sample." What factor(s) about the population of values do you think determine how large is large enough for the approximate normal shape to hold? Consider the California Decco example. Do you think n = 30 would be large enough for the distribution of possible values for the average loss to be approximately normal? Why or why not? Now consider the handspan measurements of females. Do you think n = 30 would be large enough for the approximate normal shape to hold? What is different about these two examples?
A cardiologist is interested in the mean recovery period of her patients who have had heart attacks.
a new manager hired at a large warehouse was told to reduce the 26 employee sick leave. the manager introduced a new
RESEARCHERS at a university conducted experiments with poplar trees. Listed below are weights (kg) of poplar trees given no treatment and poplar trees treated with fertilizer and irrigation.
Suppose we estimate this model with OLS, and there is a correlation between unobserved student traits (in the error term) with attendance. How does this bias the coefficient of attendance?
What is indicated about the strength of the relationship?- What are the two possible values for the correlation coefficient for the two variables?
In Figure 2.4, the locations of objects (e.g., trees, mines, dwellings) in a study region are given by the centers of "+" symbols. The goal is to estimate the number of objects in the study region.
1.a set of ten cards consists of five red cards and five black cards. the cards are shuffled thoroughly and i am given
Thermometers are normally distributed with a mean of O Celsius and a standard deviation of 1. OO Celsius, Find the probability that a randomly selected thermometer reads between - 2.23 and - 1.25 and draw a sketch of the region. The probability is..
What percent of the SAT verbal scores are less than 650 and if 1000 SAT verbal scores are randomly selected, about how many would you expect to be greater than 575?
The Texas Consolidated Electronics Company is contemplating a research and development program encompassing eight research projects. Formulate the integer programming model for this problem and solve it using the computer
Lowering the drinking age. A July 2007 Gallup Poll asked a random sample of 464 adults whether they would favor or oppose a federal law that would lower.
Give a 95% confidence interval for the difference between the population recovery rates. What can you conclude from this confidence interval?
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