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1. Julio works as a quality control expert in a beverage factory. The assembly line that he monitors produces about 20,000 bottles in a 24-hour period. Julio samples about 120 bottles an hour and rejects the line if he finds more than 1/50 of the sample to be defective. About how many bottles should Julio allow before rejecting the entire line?
2. Lunch meat sells for about $3 per pound. You use about 1/2 pound per day for sandwiches. How much should you budget for lunch meat over the next month (about 20 workdays).
What is the Z score for a person who watches more than 8 hours per day?
A bank's loan officer rates applicants for credit. The ratings are normally distributed with a mean of 175 and a standard deviation of 15. If an applicant is randomly selected, find the probability of a rating that is between 150 and 200.
Probability that the flavor will be carried by Appleton or Beacon is 15/16. Determine the probability a flavor is carried by both Appleton and Beacon.
In the early years of the twenty-first century, annual salaries for federal employees in the Upper Midwest averaged approximately $42,000, with a population standard deviation (σ) of $4,900. If we drew a random sample of 25 federal employees from ..
A seven year old study reported that women whose mothers used the drug DES during pregnancy were twice as likely to develop tissue abnormalities that might lead to cancer as women whose mothers did not take the the drug.
A researcher is estmating influence of treatment using sample selected from normally distributed population with mean of µ = 80 and standard deviation of σ = 20. Calculate power of test if researcher uses sample of n = 25 individuals.
Forecast quarterly demand where x = 0 in second quarter of last year. Quarterly seasonal factors are Q1=1.5, Q2=0.8, Q3=1.1, Q4=0.6. Determine the forecast for last quarter?
The study does not give sufficient evidence to support the claim that less than 75% of college students spend less than $250 per semester on textbooks.
Expected value, variance and standard deviation.A volunteer ambulance service handles 0 to 5 service calls on any given day. The probability distribution for the number of service calls is as follows.
Assuming that the population variances are equal for male and female Grade Point Averages (GPAs), use the following sample data to test whether the averages are different at the 0.05 level of significance.
What is the likelihood that the mean annual precipitation during 25 randomly picked years will be less than 90.8 inches?
Develop a linear regression model to predict MPG using horsepower as the only independent variable. Develop another model with weight as the independent variable. Which of these two models is better?
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