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Of the 400 respondents in the Christmas tree market survey, 43% had no children at home and 57% had at least one child at home. Corresponding figures for most recent census are 48% with no children and 52% with at least one child. Test null hypothesis that telephone survey technique has the probability of selecting the household with no children which is equal to value obtained by census. Give z statistic (rounded to two decimal places) and P-value. What do you conclude? (Use = 0.10.).
The users are then timed in their ability to setup and program the DVD by performing a series of operations. Which statistical analysis technique should be used? What is the null hypothesis? Can the market researcher get an answer? Why or why not?
Discuss why sampling is essential to many research designs, and why, if done correctly may be more accurate than attempting census measurement.
Problem based on decision tree - Evaluate the strategy that maximizes the manufacturer's expected net earnings.
Find the margin of error in estimating the population mean: confidence level = 94%; sample size=86; sample mean = 113.5; and standard deviation = 12.7.
What is a 90% confidence interval for the mean monthly expenditure on gasoline per household in Slippery Rock?
For a sample of engineers, the mean salary is $95,000 with a standard deviation of $30,000. The median value is $80,000. What is the relative shape of the distribution and coefficient of skewness?
Find the range and the standard deviation of the times.
How can you answer the dual simplex question with maximization objective function and also explain difference between m tecnique and two phase method?
Hamburger Joe's sells the best burgers in town. The variable unit cost for making one burger is $.97. The fixed cost of making burgers for 12 months will be a total of: $140,000.
A computer password consists of four characters. The characters can be one of the 26 letters of the alphabet. Each character may be used more than once. How many different passwords are possible?
Researchers at a pharmaceutical company have found that the effective time duration of a safe dosage of a pain relief drug is normally distributed with mean 2 hours and standard deviation 0.3 hour.
Harry's hamberger is a restaurant where customers form a single line for 1 cashier. The average numbers of arrivals is 1 per minute and the Poison distribution accurately defines this rate.
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