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1. Solve by graphing: 4x +5y = -2, 4y -x = 11
2. Write in the slope-intercept form:
y + 2/3= - (1/2)[x -( 2/5)]
3. A gun is fired straight upward. The bullet leaves the gun at 1000 ft. per sec. The equation for the bullet's velocity is v = -32 t + 1000. What is the velocity at 3 sec.?
4. Solve: y = 3x -4
x +y = 32
5. The combined population of X and Y was 25,000 in 1990. By 1995 the population of X had increased by 10%, while the population of Y had increased by 9%. If the total population increased by by 2,380 people, what was the population of each city in 1990?
6. - Solve by any method -x +2y =4 x-5y = 1
7. Solve by substitution:
2y - x = 3x = 3y -5 x
8. Solve by addition:
7x -4y =-3, x+ 2y =3
9. Solve by substitution :
x-y =3, 3x -2y =3
10. Solve :
|x| = 2
A study was conducted of the annual incomes of beginning probation officers in metropolitan areas of less than 100,000 population and in metropolitan areas having more than 500,000 population.
I am writing a thesis and need a paired difference statistical analysis with a confidence level at 95% with t-value for alpha of 0.25
What is the value of the mean square for error (the "within groups" mean square that would be reported in the ANOVA test, and what is the value of the mean square for treatments (the "between groups" mean sqaure) that would be reported in the ANOVA ..
A trucking firm suspects that the mean lifetime of a certain tire it uses is less than 35000 miles. To check the claim the firm randomly selects and test 54 of these tires and gets a mean lifetime of 34,570
The heights were normally distributed, with a mean of 67.8 inches and a standard deviation of 4.0 inches. A study participant is randomly selected. Find the probability that his height is less than 65 inches.
Obtain the simple linear regression equation, then analyze the residuals by (a) constructing a histogram
Develop the opportunitiy loss table and compute the expected opportunity loss for each product. Determine how much the firm would be willing to pay to a market research firm to gain better information about future market conditions.
Smaller the p-value in test of hypothesis, the more important the results are.
Oxytocin is a naturally occurring brain chemical that is nicknamed the "love hormone" because it seems to play a role in the formation of social relationships such as mating pairs and child-parent bonding.
The sensitivity of a test is the probability that a person having the disease will test positive (indicating the person has the disease, i.e., it's the probability the test will pick up the fact that a person has the disease).
Compute the 95% confidence interval around the mean of each of the three groups and plot the confidence interval in the space provided above.
For a sample with n=36, the mean duration of a geyser is 3.55 minutes and the standard deviation is 0.63 mintues. Using chebychev's theory, determine at how many of the eruptions lasted between 2.29 and 4.81 mintues.
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