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The ages of workers in Illuminex plant are around normally distributed with the mean of 47 years and standard deviation of 12 years. Worker is stopped at random and asked to fill out questionnaire. Determine the probability that this worker is less than 30 old?
What different types of variables are used in quantitative studies? Describe each type of variable and how they differ.
An airline finds that 5% of the persons making reservation on a certain flight will not show up for the flight. If the airline sells 180 tickets for a flight with only 175 seats,
At the .01 significance level, is there a difference in the mean number of times men and Women order take-out dinners in a month? What is the p -value?
Texas Company produces and sells 22,000 units of a single product. Costs associated with this level of production are as follows:
In a one-way ANOVA analysis of 3 treatments, with the total number of 9 observations, with an equal number of observations in each treatment, mean-square-error (MSE) was found to be 24.905.
The NAEP test was also given to a sample of 1077 women of ages 21 to 25 years. Their mean quantitative score was 275. Take it as known that the standard deviation of all individual scores is = 60.
The lifetime of African Cichlids is unknown but the sample of 75 cichlids were taken and its mean life time was 5.2 years with a margin error of 420 days for 95% confidence a) What is the 95% confidence interval for the lifetime of the African fish..
The owner of a fish market has an assistant who has determined that the weights of catfish are normally distributed, with mean of 3.2 pounds and standard deviation of 0.8 pound. What percentage of samples of 4 fish will have sample means between 3..
Choose a person aged 19 to 25 years at random and ask, "how many times have you worked out in the past?" Call the response X for short.
You are looking at a bond to add in your portfolio. The bond has a 7.2 percent coupon (paid semiannually), 10 years left to maturity, and can be purchased at par ($1,000).
State the decision rule using the .01 significance level. Compute the value of chi-square. What is your decision regarding Ho?
We have already been introduced to sensitivity analysis via the geometry of a simple example. We saw that the values of the decision variables and those of the slack and surplus variables remain unchanged even though some coefficients in the objec..
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