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If a total of 5,450 packages are shipped for .$1,926, determine how many individual packages were shipped and how many groups of 15 were shipped.
Identify the sample, the population, the sample statistic, and the population parameter: Nasonex is a drug used to treat allergy symptoms. In a test of Nasonex, 374 children aged 3 to 11 years were
Develop mathematical functions to compute the annual ordering cost and annual holding cost based on average inventory held throughout the year in order to arrive at a model for total cost.
Suppose that a lot of 300 electrical fuses contains 5% defective. If a sample of five fuses is tested, find the probability of observing at least one defective.
10-year period from COPD, whereas only 24 such deaths would be expected based on statewide mortality rates. Is the number of deaths from COPD in this group excessive?
Find the minimum sample size needed using a prior study that found that 54% of the respondents said they have high-speed Internet access.
Find the margin of error for the given values of c, s, and n.
A national survey is conducted to assess the association between hypertension and stroke in persons over 55 years of age. Development of stroke was monitored over a 5 year follow-up period. The dat
Find the regression equation, letting the first variable be the independent (x) variable. Find the indicated predicted values.
BMI in children is approximately normally distributed with a mean of 24.5 and a standard deviation of 6.2.
A new non-invasive screening test is proposed that is claimed to be able to identify patients with impaired glucose tolerance based on a battery of questions related to health behaviors. The new tes
To test the null hypothesis that the mean waist size for males under 40 years equals 34 inches. calculate the T-value of the test statistic?
Approximately 30% of obese patients develop diabetes. If a physician sees 10 patients who are obese,
The following table shows the numbers of patients classified as underweight, normal weight, overweight and obese according to their diabetes status.
The following are body mass index (BMI) scores measured in 12 patients who are free of diabetes and participating in a study of risk factors for obesity. Body mass index is measured as the ratio of
Twelve case of leukemia are reported in people living in a particular census tract over a five year period. Is this number of cases abnormal if only 6.7 cases would be expected based on national ca
Glucose levels in patients free of diabetes are assumed to follow a normal distribution with a mean of 120 and a standard deviation of 16.
A certain population has a mean of 460 and a standard deviation of 36. Many samples of size 56 are randomly selected and the means calculated. What value would you expect to find for the standard d
in 2007 the American golfer tiger woods competed in 26 PGA golf tournament. he finished 1st seven times, 2nd three times, and one time each in 6th, 9th,12th, 15th, 22nd and 37t. find his median fini
How large a sample is required to reduce the standard deviation of the percentage who say "Yes" from 7% to 3.5%? Explain to someone who knows no statistics the advantage of taking a larger sample i
Using a .05 level of significance you will test to determine if there is evidence that the true average return is different from $870. What are your critical values?
A filling machine in a brewery is designed to fill bottles with 355 ml of hard cider. At a significance level of 0.01, which conclusion can the brewer draw?
A group of students from three universities were asked to pick their favorite college sport to attend of their choice: The results, in number of students, are listed as follows:
Develop and solve a linear optimatization model to determine the optimal mix to maximize profit and write short memo to the president, explaining the sensitiviy infor in a language she can understan
Suppose 41% of all American adults have some college education. An American adult is randomly selected. What is the probability that the adult owns stock or has some college education?