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The top food snacks consumed by adults aged 18-54 are gum, chocolate candy, fresh fruit, potato chips, breath mints/candy, Ice cream, nuts, cookies, bars, yogurt, and crackers. Out of a random sample of 25 men, 15 ranked fresh fruit in their top five snack choices. Out of a random sample of 32 women, 22 ranked fresh fruit in their top five sack choices. Is there a difference in the proportion of men and women who rank fresh fruit in their top five list of snacks?
(a)State the hypotheses and a decision rule for α₌.10.
(b)Calculate the sample proportions.
(c) Find the test statistic and its p-value. What is your conclusion?
(d) Is normality assured?
It seems that simulation could handle any situation or study. But is that always true? Discuss instances in which a simulation would be important and useful, and then a situation in which a simulation would not be appropriate.
A metropolitan school system consists of three school districts-norths, south, central. The north district contains 25% of all students, the south district contains 40%, and the central district contains 35%.
Calculate the suitable mean response time from both proposed locations and find out which proposed site must be selected for the new emergency facility.
The cholesterol concentration in the yolks of each of a sample of 22 randomly selected eggs laid by free range chickens were found to have a mean value of 9.38 mg/g of yolk and a standard deviation of 1.62 mg/g.
Rhode Island Red Chickens the incubation time for Rhode Island Red chicks is normally distributed to find out the number of chicks we expect that will hatch.
Commonwealth Edison wants to identify its heaviest users, which are those that are in the top 6% of electric consumption. How many kilowatt hours in January would qualify for the heavy user classification?
What is a probability notation? What are the advantages and disadvantages of using a probability notation? How does probability notation aid in decision making?
A nationwide standardized test taken by high school juniors and seniors may or may not measure academic potential, but we can nonetheless examine the relationship bewteen scores on such test and performance in college.
What is the probability that a randomly selected fertilized egg hatches in less than 19 days? (Round to four decimal places as needed).
The mean maximum oxygen uptake for elite athletes has been found to be 80 with a standard deviation of 8.1. Assume that the distribution is approximately normal.
Of the 500 surveyed, 350 said they would vote for the Democratic incumbent. Using the 0.99 confidence coefficient, what are the confidence limits for the proportion that plan to vote for the Democratic incumbent?
Is the school district correct in assuming the girls are equal in performance to boys. They are 95% sure their assumption is correct.
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