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What is the standard deviation of following scores. There are 31 scores and need standard deviation for sample. 114 103 118 107 100 105 119 103 104 108 86 98 89 130 72 96 102 120 111 112 91 132 103 112 114 111 74 93 114 128 112 The mean is 105.84
To examine the effectiveness of its four annual advertising promotions, a mail order company has sent a questionnaire to each of its customers, asking how many of the previous year's promotions prompted orders that would not have otherwise been made.
You are trying to get an important new customer to buy a product that you produce. Their decision to buy depends on the speed at which you can produce the product once they have placed the order.
Do the test by hand (using Minitab just for the p-value) and confirm your results with Minitab. Interpret your results and state your conclusion in terms of the data."
The town clerk, who monitors the voting booths, informed him that all the voters in the entire town registered at a recent election, and 310,000 votes were counted.
a. What is the probability that a 0-5-ft tall tree will die before being sold? b. If a tree (less than 5 ft) is planted, what is the expected revenue earned from that tree?
A linear model to predict the Price of a 2004 Saab 9-3 (in $) from its Mileage (in miles) was fit to 38 cars that were available during the week of January 11, 2008 (Kelly's Blue Book, www.kbb.com). The model was:
Give a 95% confidence interval for the average caloric content of a 3-ounce cut of top loin steak. Also give a 98% confidence interval for the average caloric content of a cut.
what is the importance of statistics in business decision making? describe a business situation where statistics was
Identify the variable being measured and describe the sample as it relates to the population.
A class consists of 30 students, of which 20 are freshmen and 10 are sophomores. If 5 students are selected at random.
Wind Speeds. The average wind speed in Casper, Wyoming, has been found to 12.7 miles per hour, and in Phoenix, Arizona, it is 6.2 miles per hour.
What is the difference between an experiment and an observation?
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