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The Statistical Abstract of the United States published by the US Census Bureau reports that the average annual consumption of fresh fruit per person is 99.9 pounds. The standard deviate of fresh fruit consumption is about 30 pounds. Suppose a researcher took a random sample of 38 people and had them keep a record of the fresh fruit they ate for one year.
a. What is the probability that the sample average would be less than 90 pounds?
b. What is the probability that the sample average would be between 98 and 105 pounds?
c. What is the probability that the sample average would be less than 112 pounds?
d. What is the probability the sample average would be between 93 and 96?
Use this information to compute a 95% confidence interval for average number of credit cards carried by students.
Compute the probability that randomly chosen student with a Master's degree majored in English or mathematics?
Create a 95% confidence interval for population mean. Is it sensible that population mean is 28 weeks? give explanation for your answer.
The Acme Candy Company claims that 8% of the jawbreakers it produces actually result in a broken jaw. Suppose 9571 Persons are selected at random from those who have eaten a jawbreaker produced at at Acme Candy Company. Would it be unusual for thi..
To test whether the population mean is less than a specified value.
Let p1 = 100 and n1 = 500; and p2 = 200 with n2 = 500. Test whether there is a statistical difference between the two proportions at the 5% significance level.
Which measure of association do you use to compare the relationship between these variables? Why?
The article should include a margin of error and confidence interval. Discuss the subject matter in the article, and interpret the results and what the confidence interval and margin of error mean as they apply to the specific subject matter.
Calculate the coefficient of skewness and coefficient of variation of minutes spent commuting. What do these statistics tell us?
Why do we have so many several measures of central tendency? Are all really essential or do they essentially give same information?
Construct a 95% confidence interval estimate for the average waiting time of all the patients who visit this doctor. Assume the population of waiting times is normally distributed.
Given the standardized normal distribution (with a mean of 0 and a standard deviation of 1, as in Table E.2), what is the probability that:
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