How to conclude proportion has indeed changed

Reference no: EM13123368

A decade-old study found that the proportion, p, of high school seniors who believed that "getting rich" was an important personal goal was 70%. A researcher decides to test whether or not that percentage still stands. He finds that, among the 230 high school seniors in his random sample, 159 believe that "getting rich" is an important goal. Can he conclude, at the 0.05 level of significance, that the proportion has indeed changed?

Reference no: EM13123368

Questions Cloud

Aftertax cash flow from the sale : If the relevant tax rate is 34 percent, what is the aftertax cash flow from the sale of this asset? (Do not round your intermediate calculations.)

Hamiltonian and nonhamiltonian graphs : Show that this theorem 1 is sharp, that is, show that for infinitely many n>=3 there are non-hamiltonian graphs G of order n such that degu+degv>=n-1 for all distinct nonadjacent u and v.

Calculate the molarity of each of the given solutions : Calculate the molarity of each of the following solutions. (a) 23.0 g of ethanol (C2H5OH) in 545 mL of solution (b) 15.4 g of sucrose (C12H22O11) in 74.0 mL of solution

Highlighting the part indicated by given interval : Find a definite integral that represents the arc length of the curve over the indicated interval and observe that the length cannot be evaluated with the techniques studied so far

How to conclude proportion has indeed changed : School seniors in his random sample, 159 believe that "getting rich" is an important goal. Can he conclude, at the 0.05 level of significance, that the proportion has indeed changed?

What is the molarity of a solution of vinegar : What is the molarity of a solution of vinegar that is 5.00 % by mass acetic acid (CH3CO2H) and has a density of 1.01 g/mL.

Calculate the surface integral : Prove the following vector calculus identity in R 3 , where f is a twice continuously dierentiable scalar eld and F is a twice continuously dierentiable vector fi eld

Hamiltonian graphs and connected graphs : Show that if G is a 2-connected graph containing a vertex that is adjacent to at least three vertices of degree 2, then G is not hamiltonian.

Common stock outstanding of landon corporation : On January 1, 2010, Garner Corporation purchased 25% of the common stock outstanding of Landon Corporation for $250,000. During 2010, Landon Corporation reported net income of $80,000 and paid cash dividends of $40,000.

User Account

All Pages