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What type of sampling is being employed if the country is divided into economic classes and a sample is chosen from each class to be surveyed?
According to the UW Madison 2003-2004 Factbook, 11,488 of the 24,890 students enrolled at UW Madison during that year were from Madison County. This is an example of a _________________ statistic.
If the mean remained the same, but the standard deviation increased to 1.5, what percentage of children would have heights less than 27.5 inches?
Make a histogram including a table consisting of frequencies, class limits, class boundaries, and class widths with the data below: 112, 120, 128, 135, 138, 142, 143, 145, 145, 148, 150, 150, 156, 1
Construct your own empirical probability situation. that is, determine a probability value in relation to your expected degree program (education, leadership, nursing, business, etc.) you should do
Make sure that you include all required steps of the hypothesis testing procedure as outlined in class. B. Construct a 95% confidence interval estimate for the mean force. Explain how the confidence
A light bulb company is studying defects in their lightbulbs 4% of the bulbs have defects in the glass but not the coil 1% of the bulbs have defects in the coil but not the glass 0.4% of the bulbs h
A tool-crib with one attendant serves a group of 10 mechanics. Mechanics work for an exponentially distributed amount of time with mean 20 minutes, then go to the crib to request a special tool.
A statistician has to decide on the basis of two observations whether the parameter ? of a binomial distribution is 1/4 or 1/2; his loss ( a penalty that is deducted from his fee) is $160 if he is w
Show the sampling distribution of the mean amount of health care expenditures for a sample of 100 people. Round your answer to nearest whole value.
What is a point estimate of the difference between mean annual consumption in Webster City and the national mean? At a=.05, test for a significant difference. What is your conclusion?
Among eighteen computers in some store, six have defects. Five randomly selected computers are bought for the university lab. Compute the probability that all five computers have no defects.
The actual percentages of the people in the sample who have heart attacks. The use of statistical methods to make the prediction that US men aged 40 or older who take aspirin every other day have a l
A medical inspector wants to estimate the overall average monthly occupancy rates of the cancer wards in 80 different hospitals that are evenly located in the northwestern, southeastern, central, an
After you create the graph, fit a linear trend line, displaying the formula and the r-squared. Explain to the executives if you can use this time series data to forecast the ratings of upcoming mont
Assume that the client will allocate $10,000 to the eight recommended stocks in increments of $1,000, with all allocations being equally likely. Determine the probability that the client will only p
A five number summary for hours studied in a week were 5, 12, 14, 18, and 20. What was the shortest number of hours studied by anyone?
Let the interval [-r,r] be the base of a semicircle. If a point is selected at random from this interval, assign a probability to the event that the length of the perpendicular segment from the poin
A fair coin is tossed independently five times (i.e., P(heads) = P(tails) = 0.5)
Suppose that the diameters of bearings are independently normally distributed random variables with mean=1.005 and variance=(.003)^2.
The Adams Corporation stores spare parts at two warehouses, one in Baltimore and one in Plattsburgh. The number of defective and acceptable spare parts at each warehouse is given below:
Steel rods are manufactored with a mean length of 26 centimeter(cm). Because of variability in the manufactoring process, the lengths of the rods are approximately normally distributed with a stand
A certain drug causes kidney damage in 1% of the patients. Suppose that the drug is to be tested on "n" patients, and let "E" represent the event that kidney damage occurs in one or more of the pat