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Hypothesis test for one population mean1. Agriculture books. The R.R Bowker Company collects information on the retail prices of books and publishes the data in the Bowker annual library and book trade almanac. In 2005, the mean retail price of agriculture books was $ 57.61.This year's retail prices for 28 randomly selected agriculture books are shown in the following table:59.54 67.70 57.10 46.11 46.86 62.87 66.4052.08 37.67 50.47 60.42 38.14 58.21 47.3550.45 71.03 48.14 66.18 59.36 41.63 53.6649.95 59.08 58.04 46.65 66.76 50.61 66.68At the 10% significance level, do the data provide sufficient evidence to conclude that this year's mean retail price of agriculture books has changed from the 2005 mean? Assume that the population standard deviation of prices for this year's agriculture books is $8.45. (Note: the sum of data is $1539.14)Hypothesis test for one population mean when σ is unknown1. Cardiovascular hospitalization. From the Florida state center for health statistics report, women and cardiovascular disease hospitalizations, we found that, for cardiovascular hospitalizations, the mean age of women is 71.9 years. At one hospital, a random sample of 20 of its female cardiovascular patients had the following ages, in years.75.9 83.7 87.3 74.5 82.578.2 76.1 52.8 56.4 53.888.2 78.9 81.7 54.4 52.758.9 97.6 65.8 86.4 72.4
A vending machine dispenses coffee into a twelve ounce cup. The amount of coffee dispensed into the cup is normally distributed with a standard deviation of 0.08 ounce.
Meagan Dubean manages a portfolio of 200 common stocks. Her staff classified the portfolio stocks by 'industry sector' and 'investment objective. If x is a binomial random variable with n=8 and p=0.6, what is the probability that x is equal to 4?
If 3 different factor levels show a lot of variation between levels this implies:
Determine regression line for predicting January temperature from latitude.
We say that two things have a positive relationship if they move in the same direction, or as one thing increases, so does the other. Or if one thing decreases, so does the other.
Find the test statistic P-value, and critical value, and state the final conclusion.
A certain researcher thinks that the proportion of women who say that female bosses are harshly critical is greater than the proportion of men.
Were the frequency distributions used effectively to report the results? Why or why not? Find an example of a presentation of statistics using a frequency distribution(s) from any media source.
If a group of 81 children is selected at random, what is the probability that the average time these children watch television is more than 3.5 hours a day?
A single test on a certain device costs more than the entire lot. It is therefore decreed that not more than three tests will be performed per lot.
Find the β risk and power assuming that the true mean is really 380 square feet per gallon. (b) Construct a left-sided power curve, using increments of 5 square feet (400, 395).
Say a fast-food franchiser is considering building a restaurant in a local mall. According to franchise headquarters, a site is acceptable only if the number of pedestrians passing the location averages more than 100 per hour.
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