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The mean salary of the nine employees of a small business is $52,000 per year. One employee, whose salary was $68,000, was red. Two new employees, who will each be paid a salary of $40,000, are hired. What is the new mean annual salary of the employees of the business?
A researcher wishes to forcast the proportion of fish in a perticular lake which is inedible due to pollution of the lake.
The means appear to be very close, but not the variances. At α = .05, is there a difference in variances? Show all steps clearly, including an illustration of the decision rule.
Use analysis of variance to test any differences in mean glue strengths.
What is the value of the population mean? What is the best estimate of this value?
Find the regression equation and percentage of variance and test whether the equation is significant portion of the variance.
A random sample of eight cars from each manufacturer is selected, and eight drivers are selected to drive each automobile for a specified distance.
What proportion of time will it take clean-up crew 56 or more hours for cleaning plant? Define the lower and upper limits of interval.
If employee is chosen at random, determine the probability that employee is female and salaried staff? Choose the best answer from the following.
What is the probability that a cereal would be high calorie, given that it is high fiber? In other words, what is P (high calorie, given high fiber)?
Do 1-sample t-test to see if people in Chicago have travelled to fewer states than people nationwide. Utilize the 10% (.10) level of significance.
Using the original data, test at the 5% significance level that the population standard deviation of studying times is greater than 4 hours.
SAT Math scores have a bell-shaped distribution with a mean of 515 and a standard deviation of 116. a) what percentage of SAT scores are between 399 and 631?
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