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A long thin steel railway tie is 10 yards at 60oF. What will be the length be when the temperature falls to -15oF?
If g(y) = y/(1-y), show that 1/2[g(y) + g(-y)]= g(y^2).
If f(x)= x(x+1), show that f(x +h)- f(x) = h(2x+1+h).
Where in the world do we find some early evidence that people counted?
A positive z-score always corresponds to an X value greater than the mean. True or False?
Comparing the survey results of votes to the actual votes received by a candidate
in an election. Identify if it is two tailed or one tailed
Two adjacent sides of a parallelogram meet at an angle of 450 and have lengths of 5 and 11 feet respectively. Find the length of the diagonals.
A certain area of the eastern United States is, on average, hit by 6 hurricanes a year. Find the prob-ability that in a given year that area will be hit by (a) fewer than 4 hurricanes; (b) anywhere from 6 to 8 hurricanes.
The average height of students in a freshman class of a certain school has been 149.45 cm with a population standard deviation of 7.74 cm. Is there a reason to believe that there has been a change in the average height if a random sample of 43 students in the present freshman class has an average height of 164 cm? Use a 0.01 level of significance.
Write the six steps in hypothesis testing in each of the following studies. Take note, the p-value is already given.
The average family size in the Philippines was reported as 4.25. A random sample of families in a particular street resulted in the following family sizes:
5, 6, 7, 4, 3, 8, 2 and 9
\At 0.10, is the average family size more than the national average?
(p-value = 0.0961)
