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How do you calculate critical values when you're doing a 2-sample t-test with unequal variances?
An electrical firm manufactures light bulbs that have a length of life that is approximately normally distributed. If a sample of 16 bulbs has an average life of 50 hours and the population standard deviation is known to be 10 hours.
a 95 confidence interval for a population mean u is given as 18.958 21.015. this confidence interval is based on a
John can go to a prestigious graduate school for two years and obtain a degree. Including tuition and living expenses, he expects to pay $75,000
Fire insurance. Insurance companies collect annual payments from homeowners in exchange for paying to rebuild houses that burn down.
assume that the lives of all such bulb (approximately) normally distribution. Make the 99% confidence intervals for the variance and standard deviation of the lives of all such bulbs.
Two percent of the parts from a production process are defective. A sample of five parts from the production process is selected. What is the probability that the sample contains exactly two defective parts?
What is the probability of drawing a red ball on the second draw if the first one is put back in the box after it is drawn?
Be sure to show the claim, your null and alternative hypothesis and all computations and values. What do you conclude about the null hypothesis?
Choose one of the cardiovascular diseases to focus on. What is the taxonomy of the causative organism (if applicable)?
question late payment of medical claims can add to the cost of health care. an article m. freudenheim the check is
Your current sales revenue in the new year is projected to be $505,000. Find the indifference point (the break even point of sales revenue at which the fixed rent and variable rent for a year are the same). Explain which alternative you would acce..
You're a risk manager of ABC company and you are reevaulating your insurance contract. Your insurer has informed you that the expected value of frequency per month for ABC is 2.43.
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