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In a sample of 92 people who have had strokes, the average cholesterol level was 254 with a standard deviation of 48. In order to test the hypothesis (at the 5% level of significance) that the average cholesterol level of people who have had strokes was at least 240, what is the test statistic? (please round your answer to 2 decimal places
Assume that the population is normally distributed. Can we conclude at the 0.01 level of significance that the mean waiting time on special orders at this furniture store exceeds 28 days? Perform a one-tailed test.
Consider a gambler who on each bet either wins 1 with probability 18/38 or loses 1 with probability 20/38. (These are the probabilities if the bet is that a roulette wheel will land on a speci?ed color.) The gambler will quit either when he or she..
compute a 95 confidence interval for the population mean based on the sample 1.5 1.54 1.55 1.51 0.09 0.08 1.55 0.07
last weeks sales of imac computers at an apple store in oklahoma city ok are shown in the following tabledaysales
please identify the two variables and then state which is independent and which is the dependent variables in the
seven popular brands of tea are to be used in a blind taste study for consumer recognition. if four distinct brands are
create a drawing or plan for a 2 times 3 experimental design that would lend itself to a factorial anova. identify the
transit administration light-rail is one of the safest modes oftravel with an accident rate of .99 accidents per
This problem related to Basic Statistics and it discuss about standard deviation of a program being run for 0 seconds
Construct a confidence interval for the population proportion p, given n = 182, x = 135; 95%. Suppose the random variable X has a normal distribution with mean 9.0 and variance 49. The probability that X takes on a value of at least 18 is approxim..
A radio station that plays classical music has a "By Request" program each Saturday night. The percentage of requests for composers on a particular night are listed below:
For a random sample of 35 items, a known population standard deviation of 23, and a sample mean of 211 estimate the: the population mean with a confidence level of 95%.
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