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Solving quadratic equations
Discriminant of a quadratic equation
Compute the value of the discriminant and give the number of real solutions to the quadratic equation.
7x^2 - 8x + 5 = 0
Tweleve cases of leukemia are reported in people living in a particular census tract over a 5 year period. Is this number of cases abnormal if only 6.7 cases would be expected based on national cancer incidence rates?
Find the probability that in a given month:
Make a scatter plot of Y and X1 using Word. To do this click on insert and then chart. Click on X Y (Scatter). Enter the data from the table.
Determine the probability, using binomial distribution, of obtaining 4 or more nonconforming units when sampling 30 computers from batch known to be 10% nonconforming.
If a student scored 90 points on a test where the mean score was 82.2 and the standard deviation was 5.7. What steps do I do to find out the student's z score?
Construct a 98% prediction interval for the selling price of a 4l- year old house having 4500 square feet, 13 rooms, and an attached garage.
A survey found that 85% of women in a given city enjoy shopping online. Suppose you randomly selected 6 women from the city and ask them whether or not they enjoy shopping online. Find the probability that exactly 4 say they enjoy shopping online.
Heights of People - The average height of a certain age group of people is 53 inches. The standard deviation is 4 inches. If the variable is normally distributed, find the probability that a selected individual's height will be:
Now he wants to know if there is a difference between the three formats. Is there?
What is the probability that none can transact business in a foreign language?
Assume the wages are normally distributed with a standard deviation of $0.45. If a worker at this car wash is selected at random, what is the probability that the worker earns more than $6.75?
He is expected to satisfactorily service 10 patients per day at an hourly wage of $8. Which dental hygienist would be the better hire? Why?
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