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 had 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, 414, 570, 521, 663, 727, 413

Required:
a. Test the claim that the mean total score is 529 using either the classical approach (i. e., critical values and critical regions) or the P-value approach at the 0.05 level of significance.
b. Construct a 95% confidence interval (C. I.) for the true mean score for the population.
c. Does this interval contain the value reported by GMAC?
d. How many students should be surveyed to estimate the mean score within 25 points with 98% confidence?
e. How many students should be surveyed to estimate the mean score within 25 points with 90% confidence?
f. Compare your answers from questions 5 and 6. What effect does decreasing the confidence level have on the sample size required?

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step-by-step explanation:

we can use this expression to calculate the energy gain as a particle moves with a field or the energy loss as it moves against it. (note that it is also used to define the electron-volt, a unit of energy equal to that gained by an electron as it falls through a pd of 1 v, i.e. w = 1 ev = 1.6 10-19 c 1 v = 1.6 10-19j).in fact this expression is really nothing more than the statement that potential is the potential energy per unit charge. in this case, v= w/qis simply stating that the change in potential energy(or work done) per unit charge is equal to the change in potential (or potential difference), v.student questions: uniform electric fields2electron beamcathode+5 kvanode0 v

solve systems of equations by graphing. a system of linear equations contains two or more equations e.g. y=0.5x+2 and y=x-2. the solution of such a system is the ordered pair that is a solution to both equations. to solve a system of linear equations graphically we graph both equations in the same coordinate system