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A consumer survey is trying to assess how much "bad food" is being purchased. "Bad foods" are categorized into two types: high fat (Type I) and high sodium (Type II). It is found that 40% of items purchased are either Type I or II or both. The proportion of all items classified as "not high fat" is twice the proportion of all items classifed as "high fat". The proportion of all items classified as "not high sodium" is three times the proportion of all items classified as "high sodium". Calculate the probability that an item is both high fat and high sodium.
The probability that the residents?own 2 cars is 55%. Of the households surveyed, 60% had incomes over $50,000. The probability that the? residents of a household own 2 cars is?
Initially the wheel rotates with an angular speed W, causing the block to rise with a linear speed v = 0.33 m/s. Find the moment of inertia of the wheel if the block rises to a height of = 7.9 before momentarily coming to rest.
a random sample of 81 students at a local university showed that they work an average of 60 hours per month with a
Drawing the standard normal curve and indicating the area representing the probability and
A random sample of 5 parks is selected and the number of acres is shown at alpha= 0.05, find the critical value. 944, 1036, 790, 5842,566
The mean SAT score in mathematics is 498. The founders of a nationwide SAT preparation course claim that graduates of the course score higher, on average, than the national mean.
Determine whether the given value is a statistic or a parameter. A researcher determines that 42.7% of all downtown office buildings have ventilation problems. Is this a statistic or a parameter; explain your answer.
Calculate a 95% confidence interval for the population mean, based on the sample 10, 12, 13, 14, 15, 16, and 49. Change the number from 49 to 16 and recalculate the confidence interval. Using results, explain the effect of an outlier or extreme ..
What is the estimated index of satisfaction for a person who first married at 18, has an annual income of $26,500, has three children living, has assets of $156,000.
Does drug have significant effect on aggression? Use an alpha level of .05, two tails.
"MagTek" electronics has developed a smart phone that does things that no other phone yet released into the market-place will do. The marketing department is planning to demonstrate this new phone to a group of potential customers, but is worried abo..
The samples do indicate that university A's students are younger than university B's; but is the difference significant at the 1% level?
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