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A real estate office wants to make a survey in a certain town, which has 50,000 households, to determine how far the head of household has to commute to work. A simple random sample of 1,000 households is chosen, the occupants are interviewed, and it is found that on average, the heads of the sample households commuted 8.7 miles to work; the SD of the distances was 8.90 miles.(All distances are one-way; if someone isn't working, the commute distance is defined to be 0.) Suppose 86 different survey organizations take simple random sample of 100 persons in the town. Each organization gets a 90% confidence interval. About how many of these intervals should cover the population average?
Delivery Format The General Social Survey asks, "About how often did you have sex in the past 12 months?" About 47% of respondents indicated they had sex at least once a week.
Based on the Correlation following are Multiple choices question. If the correlation coefficient among two variables is equal to zero, what can be said of the variables X and Y.
Devise a method for estimating and plotting Bayesian credible regions for the paramters, using your MCMC sample and compute LS estimators of a and b,
Using equation presented calculate SST,SSE and SSr. Determine least squares regression line for this data.
What is the probability of randomly selecting a student with a treadmill time greater than 25 minutes? In symbols, p(X>25)= ? What is the probability of randomly selecting a student with a time greater than 30 minutes? In symbols, p(x>30) ?
Assume the population proportion is 0.17 and a simple random sample of 850 households will be selected from the population. What is the probability that the sample proportion will be within ±0.02 of the population proportion?
If 50 cups of coffee were measured, what is the probability that: The sample mean per cup is less than 7.8 ounces?
If the average tax payer who makes $140,000 per year owes the government $18,200 with a standard deviation of $1500, and the IRS receives a 1040 tax documents from a customer who earned $140,000 that claims he only owes $12,000, should the IRS sus..
What type of situation would I be able to understand how to use regression as a key driver as an influence in sales or other outcomes?
Experience has shown that radon gas level is approximately normally distributed for this population.
Create a scatter diagram and consider the correlation for the given data. Create a scatter diagram and sketch the line you think best fits the data.
What is the probability of a false negative test (the probability that a person having muscular distrophy tests negative)?
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