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Suppose that the selling price of the above compound depends on the alcohol contents. Specifcally, if 1/3 < X < 2/3, the compound sells for 120 dollars/gallon otherwise it sells for 90 dollars
The Snappy Service gas station manager is thinking about a promotion that she hopes will bring in more business to the full service island. She is considering the option that when a customer request
What proportion of the time is he up because of his dog? What proportion of the time does he actually spend sleeping
A manufacturer claims that its televisions have an average lifetime of at least five years (60 months) with a population standard deviation of seven months. Eighty-one televisions were selected at r
Suppose you know that the distribution of sample proportions of the residents of one town over 70 years old in samples of 110 residents is normal with a mean of 0.12 and a standard deviation of 0.03
Construct a Laspeyers index using 1988 as a base year. What are the disadvantages of thus type of index? Construct a Paasche index using 1988 as a reference base year. What are the disadvantages of th
The average magnesium concentration in ground water around Metro City is u=65.6 parts per million(ppm) with a standard deviation of o=10. The table below shows the ground-water magnesium concentrati
The annual cost of storing each item is estimated at 80 cents in interest expense, .08*$10 = $.80, plus 70 cents in warehouse expense per unit per year, or $1.50 total holding costs. Demand is assum
A research team conducted a study showing that approximately 25% of all businessmen who wear ties wear them so tightly that they actually reduce blood flow to the brain, diminishing cerebral functio
Among a random sample of 150 employees of a particular company, the mean commute distance is 25.5 miles. This mean lies 1.2 standard deviation(s) below the mean of the sampling distribution. If a se
Compute the stock-price index for the overseas trading inc. using the weighted arithmetic mean of relatives index with October 4 = 100, using base-period weights. Compute a price index by the weight
Given the following demand schedule for newspapers, find the optimal order size if papers cost the newsboy $.50 and he can sell them for $1.50 each.
Which of the following statement are false about the chi-suared distribution with v (specific value)degrees of freedom?
A tire manufacturer guarntees that the mean life of a certain type of tires is at least 35,000 miles. State the null and alternative hypotheses.
With C=0.99, construct the confidence interval for the population
This embryo may potentially develop into what kind of animal (base your answer on the animal phylogeny based mainly on morphological and developmental comparisons).
An insurance policy is written to cover a loss, X, where X has a uniform distribution on [0, 1000]. At what level must a deductible be set in order for the expected payment to be 25% of what it woul
A survey is being planned to determine the mean amount of time corporation executives watch television. A pilot survey indicated that the mean time per week is 14 hours, with a standard deviation of
The subjects were recruited in Ontario, Canada, via advertisments to participate in a study of "attitudes and values towards wine." Can we generalize our conclusions to all wine drinkers? Explain.
Can someone show that the variance is same for continuous and discrete variables?
For the estimated linear regression equation mu(hat) sub Y|x = b0 + b1x show that the point (xbar, ybar) always lies on the estimated regression line.
If 100 policies are solds, what is the approximate probability that the insurance company will have claims exceeding the premiums collected?
A research team plans to test the null hypothesis that ? = .45, sigma=.5. the test is right sided. a sample size of n=1550 is observed. When the null hypothesis is true, and n=1550, what is the stan
When the null hypothesis is true, and n=1550, what is the standard deviation of the sampling distribution of means?
A population proportion is to be estimated. Estimate the minimum sample size needed to achieve the specified margin of error with a 95% degree of confidence.