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Regression anaylsis was applied between demand for a product (Y) and the price of the product (X) and the following estimated regression line was obtained; Y = 120 - 10X. Based on the above regression equation, if the price is increased by 2 units, then the demand is expected to
a decrease by 100 units
b increase by 100 units
c increase by 20 units
d decrease by 20 units
e none of the above
A microwave oven repairer says that the mean repair cost for damaged microwave oven is less than $90. You work for the repairer and want to test this claim.
A report states that 73% of home owners had a vegetable garden. How large a sample is needed to estimate the true proportion of home owners who have vegetable gardens to within 0.03 with 98% confidence?
A skeptical paranormal researcher claims that the proportion of Americans that have seen a UFO is less than 1 in every one thousand. State the null hypothesis and the alternative hypothesis for a test of significance.
A random sample of 8 petrol stations in each of three European countries A, B and C was taken. The price per litre at each station was recorded in Euros. The prices are given below.
Is P(K + 1) = P(K)(365-K)/365 and, If so, why? Find the smallest class size K for which the probability that two or more students have the same birthday exceeds 0.5.
1. what is the purpose of conducting an experiment? how does an experimental design accomplish its purpose?2. what are
at some vacation destinations all-inclusive resorts allow you to pay a flat rate and then eat and drink as much as you
question 1 a 2009 national poll of 1053 u.s. adults found that 548 favored the governments plan for a stimulus
in a sample of seven cars each car was tested for nitrogen-oxide emissions in grams per mile and the following results
The finished subassembly two must be inspected. A list of activities, their predecessors, and their durations is given in the following Table.
Kannon Camera has developed a new camera that it claims can take an average of more than 10 photographs per second. You decide to evaluate the company's claim. In summary, in this problem you are given:
Many states are carefully considering steps that would help them collect sales taxes on items purchased through the Internet.
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