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Physical Sciences
An iceberg consists of frozen freshwater that has broken away from a glacier, and could be more than 15,000 years old. Icebergs in the Grand Banks area are estimated to weigh between 100,000 and 200,000 tons.10 Suppose a team of scientists aboard a research vessel operating in the Grand Banks area selects a random sample of 49 icebergs. The height is carefully measured for each, and the sample mean is = 102 meters. Assume σ = 25 meters.
a. Find a 99% confidence interval for the mean height of icebergs in the Grand Banks area.
b. Some experts suggest that global warming has caused there to be more icebergs of greater height. Using the interval in part (a), is there any evidence to suggest that the mean height of icebergs in the Grand Banks area is more than 95 meters? Justify your answer. Write a Solution Trail for this problem.
What statistic would be applied if the independant variable is nominal and one dependant variable is nominal and one dependant variable is scale? Is this a T-test?
Consider a class in which there are 40 students enrolled. (In what follows, ignore February 29th) John is a student in this class. What is the probability that at least one other student in the class has John's birthday (Day and month, but not nece..
For the example in Section 5.3.1, y = 0 at x = 10, 20, 30, 40, and y = 1 at x = 60, 70, 80, 90. \a. Explain intuitively why for the model, logit(π) = α + βx.
Perform the indicated test of hypothesis. HO: M 7, given x= 0.01, N=25, Xbar = 7.019 and SD is =.1681. Assume the sample is selected from a normally distributed population.
Kris bought a new fur coat for $8,000. She must pay 5% sales tax and 7% excise tax. The furrier is shipping the coat, so Kris must also pay a $15 insurance charge. What is the total purchase price of the coat
the operationalization of a construct means that there must be looked for as many related dimensions and elements of
Indicatethe method ofconstructing histogram, frequency polygon and ogive. Define Frequency polygon and Frequency Curve. Explain clearly the relation that exists n them.
Doctors often use body mass index (BMI) to measure obesity. BMI is weight/height2, where weight is measured in kilograms and height in meters.
Can one conclude at a level of significance of .01 that the new ball has improved his game?
Should the professor spend the money for this software? Support your recommendation with an appropriate test.- Explain carefully what your P-value means in this context.
A report states that 73% of home owners had a vegetable garden. How large a sample is needed to estimate the true proportion of home owners who have vegetable gardens to within 0.03 with 98% confidence?
using a 5 significance level test the claim that there is a gender differenceamong 2200 randomly selected males 72 wear
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