The Graduate Management Admission Test (GMAT) is a test required for admission into many masters of business administration (MBA) programs. Total scores on the GMAT are normally distributed and historically have a population standard deviation of 113. The Graduate Management Admission Council (GMAC), who administers the test, claims that the mean total score is 529.

Suppose a random sample of 8 students took the test, and their scores are given below.

699

560

514

570

521

663

727

513

How many students should be surveyed to estimate the mean score within 25 points with 98% confidence?

How many students should be surveyed to estimate the mean score within 25 points with 90% confidence?

Compare your answers from questions 5 and 6. What effect does decreasing the confidence level have on the sample size required?

175

step-by-step explanation:

2 inches x 10 miles = 200 miles - 3 inches = 175

region b will make the inequalities y < 2x + 1 and y > -x - 2 true ⇒ answer a

step-by-step explanation:

* lets study the graph and the inequality to solve the question

- the inequality y > -x - 2

∵ the form of the inequality is y > mx + c , m is the slope of the line

  and c is the y-intercept (the line intersect y-axis at point (0 , c)

∴ c = -2 that means the line intersect the y-axis at point (0 , -2)

∵ the sign of the inequality is >

∴ we shad the part over the line

  region a and b

- the inequality y < 2x + 1

∵ the form of the inequality is y > mx + c , m is the slope of the line

  and c is the y-intercept (the line intersect y-axis at point (0 , c)

∴ c = 1 that means the line intersect the y-axis at point (0 , 1)

∵ the sign of the inequality is <

∴ we shad the part under the line

  region b and c

∵ the common region between the two lines is region b

∴ region b will make the inequalities y < 2x + 1 and y > -x - 2 true

you could deduce the conclusion directly using the facts pertaining to the specific situation.

hope this .

current in the circuit at time t is /, then the power delivered to the resistor is

step-by-step explanation: