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Public Health and Nutrition
A recent study suggested that artificially sweetened soft drinks actually have a negative impact on weight and other health issues. Aspartame is the most common sweetener used in diet sodas. A random sample of diet sodas was obtained and the amount of aspartame in an 8-ounce can was recorded for each (in mg). The data are given in the following table.
Assume the underlying population is normal.
a. Is there any evidence to suggest that the mean amount of aspartame in an 8-ounce can of diet soda is greater than 65 mg? Use a = 0.01.
b. Find bounds on the p value associated with this test.
Explain the difference between the decision-making procedure using Forms 1 and 2 for variable sampling plans that are designed to estimate the proportion of nonconforming items.
You are told that 95% of the scores range between 300 and 660. Using the 68, 95,99.7 rule, what is the standard deviation of exam scores?
Consider a set of n independenttrials in which there are r possible outcomes s1,...,sr for each trial. In each trial, P[si] = pi. Let Ni equal the number of times that outcome si occurs over n trials. What is the joint PMF of N1,..., Nr?
Use the normal distribution of SAT critical reading scores for which the mean is 507 and the standard deviation is 121. Assume the variable x is normally distributed.
Provide an estimate, standard error, an 80 percent con?dence interval, and a 95 percent con?dence interval for θ.
What is the difference between staged and straightforward manipulations of an independent variable?- What are the general types of dependent variables?
53% of all recorded births are boys if 6 babies born in this hospital are selected at random find the probability that two of the babies selected are boys.
suppose the average family of 4 washes 2000 lbs of laundry each year. assume the variable is normally distributed with
a machine cuts steel to length for nails. the mean lenght of a nail is 43 millimeters. there is concern that the
A researcher predicts that watching a film on institutionalization will change students' attitudes about chronically mentally ill patients.
The quality-assurance department found in a sample of 50 customers at the Warren Road MacBurger that the mean waiting time was 2.75 minutes. When you perform a test of hypothesis, what would be the resulting p-value?
Indicate which of the following responses below is correct. Discuss why it is correct or discuss why standard deviation is such a valuable statistic in so many situations.
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