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A researcher wishes to estimate with 95% confidence, the proportion of adults who have high speed internet. Her estimate must be accurate within 2% of the true proportion. a) Find the minimum sample size needed using the previous study that showed 58% had high speed internet. b) No preliminary estimate is available. n=
A coin was flipped 60 times and came up heads 38 times (a) at the time .10 level of significance is the coin based towards heads? show your decision rule and calculations (b) calculate a p value and interpet.
Sampling distribution for the sample mean for a sample of size 160. This looks even more like a normal curve. This looks almost exactly like a normal curve. What have we seen from the above example?
The U.S.Census Bureau announced that the median sales price of new homes sold i April 2009 was $221,660, and the mean sales price waas $274,300. Assume that the standard deviation of the prices is $90,000.
Construct a sample space using a tree diagram - Which of the following three sets of probabilities are inappropriate because they violate a basic rule of probability
M&M Milk Chocolate candies colors are not all the same proportion. Blue consist of 24% of the bag pieces while Brown & Red only 13% each. The following was found:
You only worry if there is at least a 50 or more percent chance that you have the disease. Suppose that test has same specificity = p For what value of p will you start to worry?
You need to estimate the mean number of travel days per year for outside salespeople. The mean of a small pilot study was 150 days, with a standard deviation of 42 days.
Question 1. The percent confidence interval is the range having the percent probability of containing the actual population parameter.
A researcher hypothesizes that parents with school-aged children are more likely to vote in favor of a referendum increasing public school construct a zero order school referendum attitude table by parenting status?
An urn contains w white chips, b black chips, and r red chips. The chips are drawn out at random, one at a time, with replacement. What is the probability that a white appears before a red?
Linear Optimization
Assume each shot is independent of the others. If she shoots 6 arrows, what's the probability of each result described below. Her first bull's-eye comes on the third arrow.
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