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In a bivariate regression, which variable is the dependent variable and which one is the independent variable?
What does the intercept of a regression tell? What does the slope of a regression tell?
What are some of the main uses of a regression?
question 1a soft drink manufacturer is using a winning cap as a sales promotion. the purchaser can get a prize if they
a national study has determined that people who work full time average 43.4 hours worked per week. assume that the
If you must estimate the population mean within 2 days, how many sales representatives in the pharmaceutical industry should you sample? Use the 90% confidence interval.
A particular company offers a 500$ deductible policy. If the company wishes its expected profit to be $100, what premium amount should it charge?
Find Probability of independent events.Consider again the auto repair rates described. If you own two cars, what is the probability that.
You need to estimate the mean number of travel days per year for outside salespeople. The mean of a small pilot study was 150 days, with a standard deviation of 42 days.
A researcher believes that the percentage of people who exercise in California is greater than the national exercise rate. The national rate is 20%. The researcher gathers a random sample of 120 individuals who live in the California and finds tha..
They select every 20th person from the list until a sample of 100 is obtained. They then call these 100 people. Does this sampling plan result in a random sample? Simple random sample? Explain.
the life in hours of a 75-watt light bulb is known to be normally distributed with s25 hours. a random sample of 20
question in 1999 lehman brothers estimated that 48 of its investment bank traders took diverse forms of soft drugs.
Assume that a hand of 12 cards is dealt from a normal deck of 52 playing cards. What is the probability that of the 12 cards, 3 will be diamonds, 3 will be clubs, 3 will be spades, and 3 will be hearts.
Show that z and iz have the same modulus. How are the graphs of these two numbers related?
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