Blood Chemistry In pharmacologic research a variety of clinical chemistry measurements are routinely monitored closely for evidence of side effects of the medication under study. Suppose typical blood-glucose levels are normally distributed, with mean = 90 mg/dL and standard deviation = 38 mg/dL. 5.31 If the normal range is 65−120 mg/dL, then what percentage of values will fall in the normal range? 5.32 In some studies only values at least 1.5 times as high as the upper limit of normal are identified as abnormal. What percentage of values would fall in this range? 5.33 Answer Problem 5.32 for values 2.0 […]
The Crown Bottling Company has just installed a new bottling process that will fill 22-ounce bottles of the popular Crown Classic Cola soft drink.
The Crown Bottling Company has just installed a new bottling process that will fill 22-ounce bottles of the popular Crown Classic Cola soft drink. Both overfilling and underfilling bottles are undesirable: Underfilling leads to customer complaints and overfilling costs the company considerable money. In order to verify that the filler is set up correctly, the company wishes to see whether the mean bottle fill, µ, is close to the target fill of 22 ounces. To this end, a random sample of 36 filled bottles is selected from the output of a test filler run. If the sample results cast a […]
In statistical thinking there is a tenancy towards conservatism. The investigators, enthusiastic to obtain positive results, may prefer favorable…
In statistical thinking there is a tenancy towards conservatism. The investigators, enthusiastic to obtain positive results, may prefer favorable conclusions and may tend to over-interpret the data. It is the statistician’s role to add objectivity to the interpretation of the data and to advocate caution. On the other hand, the investigators may say that conservatism and science are incompatible. If one is too cautious, if one is always protecting oneself against the worst-case scenario, then one will not be able to make bold new discoveries. Which of the two approach do you prefer? When you formulate your answer to this […]
Coefficient of Determination 01d Listed below are amounts of court income and salaries paid to the town justices. All amounts are in thousands of…
Coefficient of Determination 01d Listed below are amounts of court income and salaries paid to the town justices. All amounts are in thousands of dollars. The percent of variations in Justice Salary that can be explained by Court Income is, approximately = ______ (answer with a percent rounded to the hundredths decimal place)
A market researcher is developing a new model of a product and wants to measure customer preference relative to the current model.
1. A market researcher is developing a new model of a product and wants to measure customer preference relative to the current model. Company policy says that new products will only be introduced if 75% of consumers prefer the new model over the old model. She conducts a test with the following hypotheses ?0:? = 0.75 and ??:? > 0.75 where p is the true proportion of consumers who prefer the new model over the old one. If the researcher rejects ?0 what should she tell her supervisor? a. I should repeat the study to see if I get the same result. […]
