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Are these fish randomly selected from the entire population of fish of each species and sex? Or is the sample a convenience sample - i.e., the fish closest to the research station that are easiest to catch? In any observational study, you must be careful that the units measured are a proper random sample from the relevant populations. Are the factors to be considered fixed effects? Does it seem reasonable that if you were to repeat the survey, you would select the same sexes and species?
Find the correlation coefficient for the data. Find the equation for the regression line for the data and predict the final grade of a student who misses 3.5 days.
The primary difference between an ordinal level and inteval level variable is: an ordinal level variable has a meaningful zero point while the inteval level variable has no zero point
The following table lists the annual amounts of glass cullet produced by Kimble Glass Works, Inc. Determine the least squares trend equation. Estimate the amount of scrap for the year 2005
Determine the probability that their SAT scores will differ by more than 50 points?
Be sure to specifically identify the statistical formulas and what additional data you would need to determine your estimate(s).
The population of lengths of aluminium-coated steel sheets is normally distributed with a mean of 30.05 inches and a standard deviation of 0.2 inches.
Using the data for women, complete an analysis of CHD incidence in women similar to the one completed for men.
A carpet company advertises that it will deliver your carpet within 15 days of purchase. A sample of 49 past customers is taken. The average delivery time in the sample was 16.2 days.
To find out whether the course is effective in increasing sales, the appropriate set of hypothesis for testing is:
Using the following data on 15 workers, construct an exact 95% confidence interval for µ.
In a study of the differentiation process, 26 juvenile animals were reared in smooth plastic trays, 18 were reared in trays containing several oyster chips, and 23 were reared in trays with only one oyster chip.
The city are below $25,000. Find the mean of the annual household incomes of this city. It is assumed that the annual household incomes follow a normal distribution.
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