retiredgigworker

Given the parabola f(x)= (2x^2)-12x+14

(a) Find the vertex and axis of symmetry.

(b) Find the Maximum or Minimum value.

(c) Solve the equation: f(x)=14

The average age of all licensed drivers in a county is 42.60 with a standard deviation of 12 , and the distribution is approximately normal. A county police officer was interested in whether the average age of drivers receiving speeding tickets differed from the average age of the driving population in the county. She obtained a sample of N=16 drivers receiving speeding tickets. The average age for this sample was M=34.40. Perform ALL of the steps of hypothesis testing necessary to determine whether this group differs from the population of drivers in the county.

Use the following table:
 

$388

$290

$501

$296

$576

489

230

243

479

438

474

497

261

462

447

Prepare a frequency distribution from the above weekly salaries of teachers at Moore Community College. Use the following intervals:

 

Salaries

Frequency

$200 - $299.99

$300 - $399.99

$400 - $499.99

$500 - $599.99

Please answer asap ..i have 15 min ..

‘Tallula's Cosmetics Factory produces shamp¢g in plastic bottles The volume of the bottles 1s normally distributed with a mean of 680 mL and a standard des sation of 8 mL 

Asample of 4 randomly-chosen bottles is studied Calculate the probability that the sample mean volume ¥S Greater than 683 ml. 

Give your answer as a decimal to four places