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The probability that a new advertising campaign will increase sales is assessed as being 0.60. The probability that the cost of developing the new ad campaign can be kept within the original budget allocation is 0.50. Assuming that the two events are independent, the probability that the cost is kept within budget and the campaign will increase sales is:
a. 0.20
b. 0.30
c. 0.40
d. 0.65
A retail federation conducted a nationwide survey of 1000 adults last October and found that approximately 55% of the respondents planned to do some type of Halloween decorating.
In general, determine the standard score a measure of?
The variance of the return per share is 4 for stock 1 and 100 for stock 2. The covariance of the return between the two stocks is 5 per share. Use the total variance of the investment as investment risk.
Research question : At α = . 01, is degree of certainty independent of credits earned?
Assume that two samples are independent simple random samples selected from normally distributed populations. Use a 0.05 significance level to test the claim that male and female biology students speak the same mean number of words in a day.
Re item 4, assume the critical value for this test is 4.92, and you obtain a computed statistical value of 7.45. Is there evidence to refuse null hypothesis? Describe why or why not?
Determine estimated average starting salary for school with average GMAT of 600 points?
What is the probability the Time/CNN poll will provide a sample proportion within plus-or-minus 0.02 of the population proportion?
Locate value of the population mean in your sketch and make an estimate of the standard deviation
The data below show the average daily high temperature for Chicago, Illinois, for twelve recent spring and summer months. Create a stem-and -leaf diagram for the data.
Give critical test statistic and compute sample test statistic. Test null hypothesis at alpha level .01.
Suppose the manufacturers claim is right, determine the probability the mean of sample is 47,840 miles or less?
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