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If the cost in millions of dollars, to remove x% of pollution in a lake modeled by C=6000/200-2x, how would I figure the cost to remove 75% of the pollution?
Here is my solution: C=6000/200-2(75)C= 120
Is this the correct way to solve?
A dataset has 1000 records and 50 variables with 5% of the values missing, spread randomly throughout the records and variables. An analysis decides to remove records that have missing values. About how many records would you expect would be remov..
Is it true that solutions to quadratic equations can always be found using the quadratic formula?
A simple random sample of 6 recent graduates revealed the following information about their weekly incomes. What is the expected value of the average weekly income of all the recent graduates?
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Formulate the null and alternative hypotheses for a hypothesis test. Identify the population and describe how to select a random sample for a hypothesis test. State in clear terms the conclusion that should be given if the null hypothesis is rejec..
Michelle is a counselor at the local crises center. She wishes to determine if there is a relationship between the gender of an individual and the amount of alcohol consumed.
Scrap rates per thousand (parts whose defects cannot be reworked) are compared for 5 randomly selected days at three plants. Does the data prove a significant difference in mean scrap rates?
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For each of the following situations, indicate the appropriate measure, incidence rate or prevalence rate and the numerical value of the rate.
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It is generally believed that electrical problems affect about 14% of new cars. An automobile mechanic conducts diagnostic tests on 128 new cars on the lot." What is the standard deviation for the sample proportion?
What is the 95% confidence interval for the difference between the mean prices of the two models?
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