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In given Exercise, what is the probability of getting a sample mean between $97,500 and $102,500?
Exercise Someone claims that within a certain neighborhood, the average cost of a house is µ = $100,000 with a standard deviation of σ = $10,000. Suppose that based on n = 16 homes, you find that the average cost of a house is X‾= $95,000.
Assuming normality, what is the probability of getting a sample mean this low or lower if the claims about the mean and standard deviation are true?
The mean body mass index (BMI) for boys age 12 is 23.6. an investigator wants to test if the BMI is higher in boys age 12 living in new york city.
A highly trafficked Interstate Highway has an hourly average of 2 accidents over any 10 mile stretch. The number of accidents is believed to follow a Poisson distribution.
Use MegaStat's output for simple linear regression to determine the regression equation
A researcher claims that the average age of people who buy lottery tickets is 70. A sample of 30 is selected and their ages are recorded as shown below. The standard deviation is 16. At alpha = 0.05 is there enough evidence to reject the researche..
Determine the probability that Mary obtains exactly one Head.
1. Differentiate the main actions between doing and improving your activities. 2. Determine the overall manner in which variation has affected your activities.
At significance level of 0.02, is this sample evidence consistent with a hypothesis that 10% or fewer of all dollar bills have anything written on them besides the normal printing?
The average labor charge for automobile mechanics is $54 per hour. The standard deviation is $4. Using Chebyshev's theorem, find the percentage of data values that will fall in the range of $48 to $60.
Findout either the given correlation is significant at given level of significance. Illustrate what does sample size have to do with the significance of r.
Develop a joint probability table for these data. If a student goes full time, determine the probability that school quality is first reason for selecting a school?
How much error, on average, would you expect between the sample mean (M) and the population mean for: a sample of n=4 scores, a sample of n=16 scores, and a sample of n=25 scores.
question let x denote the number of days with snowfall of at least 1 inch in a winter. during the past 121 winters
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