Evidence of a significant difference

Reference no: EM1313874

Where people turn to for news is different for various age groups. Suppose that a study conducted on this issue was based on 200 respondents who were between the ages of 36 and 50 and 200 respondents who were above the age of 50. Of the 200 respondents who were between the ages of 36 and 50, 82 got their news primarily from newspapers. Of the 200 respondents who were above age 50, 104 got their news primarily from newspapers.

a) Construct a 2 X 2 contingency table.

b) Is there evidence of a significant difference in the proportion who get their news primarily from newspapers between those 36 to 50 years old and those above 50 years old? (use α = 0.05)

c) Determine the P-value in (a) and interpret the meaning

d) We're learning the χ²-test to for testing if there is evidence that two population proportions differ. As mentioned in the text, there is also an equivalent two-sided z-test for this. Use software to generate the z-statistic for comparing two proportions. Then verify that your χ²-stat from Part (a) is the square of the z-stat (give or taking rounding), and that both statistics have the same p-values.

Reference no: EM1313874

Questions Cloud

Normal approximation to determine probability : Use normal approximation to determine probability that x = 2. Illustrate all work.

Fed makes open market bond purchases : Explicate Illustrate what happens to the interest rates when the Fed makes open market bond purchases.

Calculation of depreciation for plant assets : Calculation of depreciation for plant assets and determine the depreciation expense for the second year on this asset?

Calculate growth rate of nominal gdp : What was the growth rate of nominal GDP between 1999 and 2000? (Note the growth rate is the percentage change from one period to the next).

Evidence of a significant difference : Is there evidence of a significant difference in the proportion who get their news primarily from newspapers between those 36 to 50 years old and those above 50 years old? (use α = 0.05)

Computation the expected amount of disposable income : Computation the expected amount of disposable income of project and what is the expected amount of disposable income the landlord will have facing this risky situation? Is this a fair gamble.

Each camera requires one lens : Each camera requires one lens. Explain how many cameras will Cam co produce also Illustrate what price will be charged for each.

Journal entries for recording transactions : Journal entries for recording transactions of disposition and purchase of asset - Prepare the journal entries to record the transactions April1 and August 1, 2007.

If interest rates could be deducted from income : If interest rates could be deducted from income, would an investor change his/her decision based on question 1.

User Account

All Pages