In a certain state, a referendum is being held to determine whether the transportation authority should issue additional highway bonds. A sample of 500 voters is taken in county A, and 285 say that they favor the bond proposal. A sample of 600 voters is taken in county b and 305 say that they favor the bond issue. Perform a hypothesis test to measure the strength of the evidence that the proportion of voters who favor the proposal is greater in county A than in county b State the null and alternate hypotheses, find the P-value. and state your conclusion. Use the α = 0.05 level of significance.
Answer to relevant QuestionsContaminated water: The concentration of benzene was measured in units of milligrams per liter for a simple random sample of five specimens of untreated wastewater produced at a gas field. The sample mean was 7.8 with a ...Two extrusion machines that manufacture steel rods are being compared. In a sample of 1000 rods taken from machine a. 960 met specifications regarding length and diameter. In a sample of 600 rods taken from machine b. 582 ...Compute the expected frequencies under the null hypothesis of homogeneity. In a hypothetical study, four hospitals were compared with regard to the outcome of a particular type of surgery. For each patient at each hospital, ...Compute the expected frequencies under the null hypothesis of independence. The General Social Survey polled 1280 men and 1531 women to determine their level of education. The results are presented in the following table. Use the data in Table 12.10 to test the null hypothesis that acceptance to graduate school is independent of department. Show that this hypothesis is rejected at the . = 0.01 level.
Post your question