Question

In a political survey, 379 out of 520 respondents expressed opposition toward a proposed tax measure. Find a 99% confidence interval for the population proportion opposed to the measure. a. (0.7116, 0.7460) b.(0.7069, 0.7507) C. (0.6677, 0.7899) d.(0.7575, 0.8568) .(0.6786, 0.7791)

Answer 1

Using Minitab:

• Click Stat → Basic Statistics → 1 Proportion.
• A new window named “One-Sample Proportion” appears.
• Click on the drop-down menu and choose “Summarized data.”
• Enter “379” in the box of “Number of events.”
• Enter “520” in the box of “Number of trials.”
• Check the box “Perform hypothesis test.”

One-Sample Proportion Summarized data 379 Number of events: Number of trials: 520 Perform hypothesis test Hypothesized proportion: Options... Select Cancel Help OK X

• Click “OK.”
• The one sample proportion test results appear in the session window.

Test and Cl for One Proportion Sample p Sample 99% CI X N 1 379 520 0.728846 (0.675698, 0.777717)

Hope this will be helpful. Thanks and God Bless You:)