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he mayor of a small town would like to know whether a local bond issue is likely to pass or not. He mails a survey to 500 randomly selected voters. How many returns must he get in order to know the proportion that will support the bond issue within a standard error of 5% and a confidence level of 95%?
Last week Sarah had exams in Math and in Spanish. On the math exam, the mean was m = 40 with s = 5, and Sarah had a score of X = 45. On the Spanish exam, the mean was m = 60 with s = 8 and Sarah had a score of X = 68. For which class should Sara e..
Dividend is expected to grow 7% a year for next 3 years and then at 5% a year after that. Determine the expected dividend per share for each of the next five years?
What is the probability that the poll gets a sample in which fewer than 45% say they do not get enough time for themselves. Show your method.
The number of degrees of freedom corresponding to between treatments is:
A grab bag contains 10 $1 prizes, 7 $5 prizes, and 3 $20 prizes. three are chosen at random. find the probability that exactly two $20 prizes are chosen?
Determine the probability that a single light bulb lasts over 120 hours. (d) Could you use the CLT to approximate the distribution of the total lifetime of these bulbs?
Identify the null and alternative hypothesis, test statistic, P-value,critical values and state the final conclusion that addreses the original claim:
Use the Emperical Rule to find what two values 68% of the data will fall between for a data set with a mean of 219 and standard deviation of 20.
Write introduction to SPC (STATISTICAL PROCESS CONTROL)? Describe the use of SPC tools used at D2D?
A psychology professor is interested in whether implementing weekly quizzes improves student learning. She decides to use the weekly quizzes in one section of her introductory psychology class and not to use them in another section of the same cou..
A southern state has an unemployment rate of 6%. The state conducts monthly surveys in order to track the unemployment rate. In a recent month, a random sample of 700 people showed that 35 were unemployed.
A pharmaceutical company conducted study to evaluate the effectiveness and safety of new inhaled form of insulin for treatment of diabetes. A group of 650 diabetics was given the drug twice a day, while another group of 650 diabetics was given an ..
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