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This is a binomial experiment. A man plays a game of chance in which the probability of his winning is 45% The random variable "x" is the number of times he wins in 20 attempts at the game. Find the
Without using a computer, make a frequency distribution and histogram (using appropriate bins) for these 28 observations on the amount spent for dinner for four in downtown Chicago on Friday night.
At the 0.05 level of significance, is there evidence of a linear relationship between delivery time and the number of cases delivered?
Assume the body temperatures of healthy adults are normally distributed with a mean of 98.20 °F and a standard deviation of 0.62 °F.
Explain why the decision maker might feel uncomfortable with the expected value approach, and decide to use a non-probalilistic approach even when probabilities are available.
The consultant has offered to share their analysis with your company for a fee of $25.0 million. What is the Expected Value of Perfect Information in this scenario?
The sample mean is $43000 for a sample of n = 100 construct a 90% confidence interval that her estimate is correct. Interpret the answer in the context of the problem.
A survey of the membership indicates that 65% regularly use the golf course, 49% regularly use the tennis courts, and 7% use neither of these facilities regularly. What is the probability that a wo
Formulate hypotheses that can be used to determine whether the mean price in New York City differs from $5600.
In the evaluation of a sales training program, a firm discovered that of 50 salespeople receiving a bonus last year, 15 had attended a special sales training program. The firm employs 250 sales peop
Fifty-six percent of American adults eat at a table-service restaurant at least once a week. Suppose that four American adults are asked if they ate at table-service restaurants last week. What is t
A mean of 68 years and a standard deviation for 3.5 years. What proportion of the plan recipents die before they reach the standard retirement age of 65.
What is the breakeven point for the number of luxury boxes in the new stadium?
Widgetco is about to introduce a new product. One unit of this product is produced by assembling subassembly 1 and subassembly 2. Draw a project diagram (network) for this project?
Company buys calculators from a Korean supplier. The probability of a defective calculator is 10%. If three calculators are selected at random, what is the probability that more than one of the calc
suppose that in fact the blood cholesterol level of all men aged 20 to 34 follows the normal distribution with mean of 188 milligrams per decileter and standard deviation of 41 mg/dl. in an srs of 1
When the fills of the jars are measured, it is found that = 15.9750 and s = .02454. Using and s as point estimates of and , estimate the probability that a randomly selected jar will have a fill, x,
a vaccine is tested on 100 people. there is .8 chance it will provide immunity. what is the probability that 74 will develop immunity?
We know from preliminary studies that the standard deviation is around 2.8. How many students should be sampled to be within 0.5 drink of population mean with 95% probability?
The college of business administration at acorn university offers a major in finance. Based on historian records, 30% of the college of business students major in finance. A random sample of 20 stu
In a poll of 553 voters in a certain city, 64% said the back a bill which would limit growth and development in their city. The margin of error in the poll was reported as 4 percentage points ( with
Given the consumer is over 24 years old, what is the probability that the consumer uses a plastic card (to 4 decimals)?
A simple random sample of 1088 adults under the age of 44 is conducted. it is found that 261 of them smoke. use a 0.05 significance level to test the claim that < 25% of such adults smoke.
A thorough examination reveals there is nothing wrong with the filling machine. From a statistical standpoint, was there a type error made? If yes, which type? Explain.
At the .05 level of significance, is there evidence to suggest that the mean life length of the batteries produced by this manufacturer is more than 400 hours?