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The city council of a suburb of Columbus is interested in the level of public support for a new recreation center. A marketing research firm is selected which then selects a simple random sample of 50 adult residents and contacts each to determine whether the resident would be interested in joining this recreation center if it were built. Of these, 35 indicated they would be interested in joining the recreation center. The chance that all 50 residents in a neighborhood end up being the sample of residents selected is:
1) the population of the suburb divided by 50.2) the same as for any other set of 50 residents.3) smaller than average due to the "cluster" effect.4) smaller than average due to stratification.
Steven collected data from 20 college students on their emotional responses to classical music. Students listened to two 30-second segments from "The Collection from the Best of Classical Music."
According to a well-known newspaper journal, 58.3% of the 222,900 households in particular county get the Sunday edition of local newspaper. Assume that random samples of 200 households are selected.
A recent study at a local college claimed that the proportion of students who commute more than fifteen miles to school is no more than 25%.
Why is cohort studies more expensive than case-control studies? I know one problem is cohort studies often must be followed up for a long period to determine whether the outcome of interest has developed and they are more expense than case-control..
Average electric use was studied.a previously known population standard deviation was 450KWH. a sample of 81 houses was studied and found to have a mean of 1858 KWH. Find the 95% confidence interval for the true mean.
The Bureau of Labor Statistics reported that the average annual income of dentists in the year 2005 was $110,000. A sample of 81 dentists, which was taken in 2006,
Tourism is one consideration for Coffee Time's future. A survey of 1,233 visitors to Mumbai last year revealed that 110 visited a small café during their visit.
What is the likelihood all four of the selected flights arrived within 15 minutes of the scheduled time?
It was thought that the national average price per pound for Ospertan Basil Oil in 1999 in the US was $14 per pound. Since that time the Ospertan Basil Oil Cartel (OBOC) has tried to limit the supply of Ospertan Basil Oil reaching the U.S in order..
Conduct an analysis of variance
If "fair" coin is tossed four times and comes up heads all four times, probability of heads on the fifth trial is?
Micron Electronics makes both desktop and laptop personal computers that they sell directly to customers by phone or over the Internet.
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