2) Sample mean can be used to make estimations of population mean. Considering the following example: It is known that population standard deviation is 11 days for the days of absence per worker per year in an industry. A random sample of 100 workers gives a mean of 8 days` absence. a. Please calculate the standard error of the sample mean. b. Please construct 95 percent confidence intervals for the population mean (Z0.025 = 1.96). c. Please construct 99 percent confidence intervals for the population mean (Z0.005 = 2.575). d. Comparing your answers from subquestions b and c, sustained your findings.

Q: Solve 4x x-2 1 2 b. x= -2,2 a. x= 3x-2 x-2 for x. C. x = -2 d. x=2

A: We can answer the question as below.

Q: Solve for y. x + 2 x + 4 X y+ 6 14

A: Given ,  We have to solve for y

Q: 5) Solve for x. 2Vx + 2 - V3r + 4 = 1

A: In algebra, an equation can be defined as a mathematical statement consisting of an equal symbol…

Q: Solve. X+y +z = - 11 2x + y-z = - 13 X-y +z = 1

A:

Q: ) Solve: |5x - 7| = 3. a. -2, -4/5 b. 2 c. 4/5 d. 2, 4/5

A:

Q: Solve 11x - 7 = 7x + 13.

A:

Q: 3) You walk 3 miles from your house to the store. At the store you meet up with a friend and walk…

A: given information is  ,    walking from home to a store = 3 miles    at store , after meet up with a…

Q: 6. -30 4 2) -5 -10 40 寸

A:

Q: Solve. 2r + 8 4 2r - 4 2 The solution set is

A:

Q: Solve. x+y+z = 3 2x +y-z = 8 x-y+z = - 5 The solution set is {OID}: (Simplify your answer.)

A:

Q: Solve for x, and x2. 4 5 X1 19 3 2 X2 9 (Simplify your answers. Type integers or fractions.)

A:

Q: Claim: The mean systolic blood pressure of all healthy adults is less than 122 mm Hg. Sample data:…

A: given data claim : The mean systolic blood pressure of all healthy adults is less than 122 mm Hg. n…