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The U.S. national average door-to-doctor wait time for patients to see a doctor is now 21.3 minutes. Suppose such wait times are normally distributed with a standard deviation of 6.7 minutes. Some patients will have to wait much longer than the mean to see the doctor. In fact, based on this information, 3% of patients still have to wait more than how many minutes to see a doctor?
If the rainfall was recorded on 27 (instead of 9) randomly selected days throughout the year, the standard error of the mean would be equal to?
In 1992, the FAA conducted 90,000 pre-employment drug tests on job applicants who were to be engaged in safety and security-related jobs, construct a 95 percent confidence interval for the population proportion of positive drug tests.
If the sides of a square are lengthened bt 5cm, the area becomes 169cm2. Find the length of a side of the original square.
A permutation resample for a two-sample test
An important subcomponent of a medical device produced by a manufacturing line is normally distributed with mean 70.2" and standard deviation is 1.26".
the data in table are a sample of the cycle time in days to process and pay employee health insurance claims in a
State the hypotheses for a right-tailed test. Obtain a test statistic and p-value assuming unequal variances. Why might the sample data not follow a normal, bell-shaped curve? If not, how might this affect your conclusions?
A federal report find that a lie detector test given to truthful persons have a probability of 0.2 of suggesting that the person is deceptive. A company asks 12 job applicants to take a lie detect test. Suppose that all 12 applicants answer truthf..
thirty percent of american parents allow their children under age 13 to stay home alone after school. source united
one environmental group did a study of recycling habits in a california community. it found that 71 of the aluminum
The actual proportion of doctors is less than 90%, a random sample of 100 doctors resulted in 85 who recommended brand Z. The test statistic is approximately?
Cough-a-Lot children's cough syrup is supposed to contain 6 ounces of medicine per bottle. However since the filling machine is not always precise, there can be variation from bottle to bottle. The amounts in the bottles are normally distribut..
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