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1. After you have matched the graphs to the variables, describe each distribution and any unusual features (e.g., is the distribution skewed to the right? Is it symmetric? Are there outliers? Why might this be so?).
2. In each case estimate whether the mean is greater than, less than, or equal to the median, and explain your reasoning.
Research information about the services provided by one county, one state, and one national public health organization.
ten motors are packaged for sale in a certain warehouse. the motors sell for 100 each but a double-your-money-back
You want to know whether the population means are different in the two populations. Conduct an hypothesis test using an alpha of .05 and the critical value method.
An optical ?rm buys glass slabs to be ground into lenses, and it is known that the variance of the refractive index of the glass slabs is to be no more than 1.04 × 10-3. The ?rm rejects a shipment of glass slabs if the sample variance of 16 pieces..
The accounting department at Western Materials Inc. national manufacturer of unattached garages, reports it takes two construction workers of a mean of 32 hours and standard deviation of 2 hours to erect Red Barn MODEL.
It is known that 15% of US home mortgages are under water (i.e. the homeowner owes more than the house is worth). Suppose 18 mortgages are randomly selected (assume independence). Let the random variable X equal the number that are under water.
because elderly people may have difficulty standing to have their height measured a study looked at the relationship
For each of the given, indicate whether the variable is ordinal or not. If the variable is not ordinal, indicate its variable type.
Give null and alternative hypotheses for this test in symbolic form.
the national center for health statistics reports that the mean systolic blood pressure for males 3 to 44 years of age
In a manufacturing process, the diameter of the steel rods is the product characteristic. A random sample of 25 steel rods is taken and sample mean is 8.88 cm.
The average salary of senior managers in the construction industry is $180,000 per year. Suppose we would like to take a sample of senior managers at a newly established company XYZ to see whether the mean annual salary is different from that ..
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