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Plot the great-circle route from Washington, D.C. (39 degree N, 77 degree W) to Moscow (56 degree N, 38 degree E).
a) what is the distance between the two cities? (radius of the earth= 6360 km)
b) what is the true bearing of an airplane flying from Washington to Moscow at the beginning , midpoint, and end of the trip? (The bearing is the angle measured clockwise from north to the flight direction. Thus east is 90 degree and west is 270 degree)
c) repeat for a trip from Los Angeles to a city outside North America.
When estimating a population mean with a confidence interval estimate, then E is:
In 35 of their stores they sold on the average 430 suits per year with a population standard deviation of 40. What is the test value for their claim?
Provide an explanation of a chi-square test. Why would you use the chi-square statistic? What type of data is used with chi square analysis?
When 186 homes in Hyde Park, NY were tested for radon, 30 were found to have levels above the maximum safety level. What is the percentage of the Hyde Park homes above the maximum safe level of radon?
the mean income per person in the united states is 40500 and the distribution of incomes follows a normal distribution.
A university has studied the relationship between the GPA (grade point average) of its graduates and StartSal, their starting salaries (in thousands of dollars). A sample of seven graduates was randomly selected.
critical thinking lurking variables over the past 50 years there has been a strong negative correlation between average
a normally distributed random variable y has std dev. 800. a random sample of 100 observations was taken from y and
Compute mean x and standard deviation s of data above. Calculate Ho by using traditional/classical method.
If the sample standard deviation of the sample was $630 also the sample size was 50. Findout the 90% confidence interval of true mean.
To report their finding they want to create a 90% confidence interval. What would be the margin error for this confidence interval?
Suppose that 30% of all adults in Ohio support the increase. The probability that at least 800 people support the increase is?
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