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Rresearch company has been appointed by realty company to do the analysis of heating cost of homes in region. Realty company wanted to be able to forecast heating cost of typical single-family home. Realty company was constantly being asked questions concerning heating costs by potential home buyers. It was thought that these variables would influence heating costs (Y'): mean daily outdoor temperature (X1), number of inches of insulation (X2), and age in years of furnace (X3). Multiple regression analysis produced following regression equation: Y' = 427.2 - 4.58X1 - 14.83X2 + 6.10X3. Which statement is right based on this analysis?
If 200 of the adults surveyed were in the age category of 24 and under and they provided a standard deviation of $14.50, construct a 95% confidence interval for the weekly average expenditure on fast food for adults 24 years of age and under.
Some studies suggest a beta-carotene intake over 3000 mcg may protect against ?macular degeneration. What percentage of people has a dietary beta-carotene intake of at least ?3000 mcg?
Die with 4 sides {1, 2, 3, 4} is tossed 2 times. Let X equal maximum of two observations and let Y equal minimum. Determine joint pmf of X and Y, and correlation coefficient. Are X and Y independent?
If garage is robbed, determine the probability doors were left open?
You draw two cards from a standard deck of 52 cards, but before you draw the second card, you put the first one back and reshuffle the deck.
A study regarding the relationship between age and the amount of pressure sales personnel feel in relation to their jobs revealed the following sample information.
Is the sample a part of the population or the population apart of the sample? Why would researchers just not use the entire population to be more accurate? Can you give an example of a sample from a given population?
A gambler loses 10 times running at roulette. He decides to continue playing because he is due for a win, by the law of averages. A bystander advises him to quit, on the ground that his luck is cold. Who is right? Or are both of them wrong?
What type of probability distribution is presented? Find the probability that exactly 5 of his saplings will die in that first winter. Round to 4 decimal places. Find the probability that 5 or less of saplings will die in that first winter. Round to ..
Customers arrive to the company at a rate, on average, of one per hour with a Poisson distribution. The company is staffed by a single individual(the owner) who takes on average 30 minutes with each customer with a standard deviation of 15 minute..
What is the likelihood that the mean annual precipitation during 25 randomly picked years will be less than 90.8 inches?
The amount of time a bank teller spends with each customer is normally distributed with a mean of 3.10 minutes and a standard deviation of 0.40 minutes.
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