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Based on all tax returns filed in 2001, the Internal Revenue Service found the total deduction claimed on an itemized return by someone with an adjusted gross income between $30,000-$50,000 per year to be normally distributed with standard deviation $770. Suppose 20 IRS agents each randomly selects 10 returns and calculates the standard deviation of his/her sample. Approximately how many agents will calculate a standard deviation? $1000? Approximately 19 of the agents will calculate a standard deviation greater than or equal to what amount?
An entrepreneur owns two hotels, one in the western region of a certain state and the other in the eastern region. He thinks that the average amount spent by guests for lunch at his Friendly Café-West is less than $34.50
The impact of campaign film on attitudes toward a political candidate was investigated. Prior to showing the film, the attitudes of 15 people toward the candidate were assessed using a political likability scale.
To test whether or not there is a difference between treatments A, B, and C, a sample of 12 observations has been randomly assigned to the 3 treatments. You are given the results below.
question a recent american medical association survey of 785 randomly selected university graduates found that 144 of
If, 20 patients improved, 7 declined, and 3 remained the same, assess whether or not patients undergoing this treatment are showing significant change from baseline to 3 months afterward. Report a p-value.
1. Allen Machines specializes in developing weed-harvesting equipment that is used to clear small lakes of weeds. Allen Machines is contemplating the construction of a machine that would harvest weeds on narrow rivers and waterways. The activ..
After a bumper crop, a mushroom grower hypothesizes that mushrooms will remain at the average wholesale price of $1 per pound. State the null hypothesis and the alternative hypothesis.
Find the mean, median, mode, variance, standard deviation, frequency table, cumulative frequency table, coefficient of variation, and mean deviation of the population.
Find a value of p such that when 10,000 bits are received, the expected number of errors is at most 10 and using this value of p what is the probability of no errors? Of at least 1? of at least 10?
Sue and Jim approached the machine first. They both said they wanted red gum balls. What is the likelihood they will get their wish?
Suppose in an attempt to develop marketing materials Tyco marketers are interested in determining whether there is a significant difference in the cost of replacing pipeline seals in different countries.
Let x denote the total number of steps required to do the analysis (both procedures). Show the value of the random variable for each of the experimental outcomes.
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