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A companyis developing a new high-performance wax for cross country ski racing. In order to justify the price marketing wants to be very fast. spcifically, the mean time to finish their standard test course should be less than 55 seconds for former Olympic champion. to test it, the champion will ski the course 8 times. The champion's times (selected at random) are 49.6, 59.4, 52.3, 55.2, 49.6, 52.3, 53.6, 53.6 and 45.4 seconds to complete the test course. complete parts a and b below.
a. What is the value of the test statistic?
b: What is the p-value?
recent years have also seen an increase in the use of atm machines. when mr. selig took over the bank the mean number
Approximately what percentage of the manufacturer's batteries will last between 40 months and 80 months? suppose your battery lasts 37 months. What could you infer about the manufacturer's claim?
The New York Times recently reported that 60% of college entrants into elite public and private colleges in the U.S. have parents that earn over $150,000/yr.
The underlying data are in file XR10033. Identify and interpret the p-value for the test. Using the 0.025 level of significance, what conclusion will be reached?
Use a 0.05 significance level to test the claim that these credit rating are from a population with a mean that is equal to 700.
a student parks his car illegally on campus for a period of exactly one hour. parking enforcement personnel check the
Most traffic lights are set so that there is enough time for pedestrians to cross the road safely. A recent study indicates that a large number of elderly cannot get across the road in the usual 15 seconds allowed.
Discuss an element of drinking water where you see a public health gap or need that should be addressed. You may bring up a specific case relevant to your community if you have one, or bring up a global issue.
Recognize the kind of sampling (random, systematic, convenience, stratified, cluster) employed whenever a sample of people who smoke is obtained as explained below.
wall street securities firms paid out record year-end bonuses of 125500 per employee for 2005 fortune february 6 2006.
If 8 women are randomly sampled, what is the probability that 0 through 8 of the women are employed outside the home?
Suppose you take a random sample of 15 bearings and compute xbar = 8.2535. What is the probability that you will see a sample mean greater than xbar?
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