Directions: What does each of the following mean? Write out in words and phrases. Example: 7 - 12 means: seven minus twelve

1. 8 + t

2. 10rst

3. t - 4

4. (8)(n)

5. 10 * s

6. 6x

7. x + y

8. 2x + 4y

Solve for the following if x = 6: (Hint: substitute 6 for the letter x and work the problem. You will work more with substitution later.)

Example: 10x = 10*6 = 60

9. x - 6 ( if x = 6)

10. 7 + x ( if x = 6)

11. 3x - 9 ( if x = 6)

12. 63/x ( if x = 6)

13. 5 + 5x + 10 ( if x = 6)

Use the given degree of confidence and sample data to construct a confidence interval for the population mean mu . assume that the population has a normal distribution. a laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 185 milligrams with sequals 17.6 milligrams. a confidence interval of 173.8 mgless than muless than 196.2 mg is constructed for the true mean cholesterol content of all such eggs. it was assumed that the population has a normal distribution. what confidence level does this interval represent?