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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).
In testing equality of two means below, determine the test statistic? (Use the equal variances formula)
A membership drive in a metropolitan area resulted in 500 new members. What is the probability that 175 or more of the new members are significantly overweight?
Construct a 95 percent confidence interval for the true mean.
Say you think your positive pairs trade returns are due to pairs trades you made on small stocks (measured by market capitalization). Describe how would you test this hypothesis?
You can allow the cup to overfill 4% of the time. What amount should you set as the mean amount of coffee to be dispensed?
The average number of miles that 90 truckers drove in a day was 540.0 with a standard deviation of 40 miles. What is the 99% confidence interval of the true mean number of miles driven by all truckers?
What can you say with 95% confidence about the percent of all American adults who think that humans developed from earlier species of animals.
How many boxes must the processor sample to be 95 percent confident that the sample mean does not differ from the population mean by more than 0.2 pounds?
Construct a 95% confidence interval on the population mean for the following sample data set:
Construct a confidence interval for the population proportion p, given n = 182, x = 135; 95%. Suppose the random variable X has a normal distribution with mean 9.0 and variance 49. The probability that X takes on a value of at least 18 is approxim..
If the life of wild pheasants follows a normal distribution with a mean of 9 months and a variance of 9, what percent of the population will be less than 11 months of age?
A researcher is comparing two antihypertensive drugs A and B with regards to reduction of patient's systolic blood pressure (SBP). Baseline SBP is measured for two groups of patients.
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