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What purchases will be made? A poll of 811 adults aged 18 or older asked about purchases that they intended to make for the upcoming holiday season.5 One of the questions asked what kind of gift they intended to buy for the person on whom they intended to spend the most. Clothing was the ?rst choice of 487 people.
(a) What proportion of adults said that clothing was their ?rst choice?
(b) What are the odds that an adult will say that clothing is his or her ?rst choice?
(c) What proportion of adults said that something other than clothing was their ?rst choice?
(d) What are the odds that an adult will say that something other than clothing is his or her ?rst choice?
(e) How are your answers to parts (a) and (d) related?
Consider each situation described below. Identify the population and the sample, explain what p and p represent, and tell whether the methods of this chapter can be used to create a confidence interval.
Determine whether the description corresponds to an observational study or an experiment. Thirty university students are divided into two groups, one group receives free tutoring in mathematics, the other does not.
The manufacturer of the X-15 steel-belted radial truck tire claims that the mean mileage the tire can be driven before the tread wears out is 60,000 miles. The standard deviation of the mileage is 5,000 miles.
It has been claimed that women live longer than men; however, men tend to be older than their wives. Ages of sixteen husbands and wives from England were obtained. These data should be analyzed with a
The interval 6 to 12 pounds. find the probability that a person on this diet losses more than 11 pounds in the first two months.
e-loan an online lending service recently offered 36 month auto loans at 3.6 to applicants with good credit ratings. if
consider the sampling designs provided below. for each sampling design indicate whether or not the sampling is flawed.
researchers studied the effects of adding an exercise program to dieting in the achievement of weight loss. a sample of
Assign probabilities to the sample points and then find the probability that the first envelope purchased contains less than $100.
Calculate percentage and sectarian angle of each program - construct a frequency distribution and draw a histogram and frequency polygon.
which of the following is not an assumption needed for one-way analysis of variance?a random selection of samples frome
State the general relationship between consumption Y and disposable income X in (a) exact linear form and (b) stochastic form. (c) Why would you expect most observed values of Y not to fall exactly on a straight line?
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