a Estimate the proportion of made 6 foot putts by professional golfers Estimate

# A estimate the proportion of made 6 foot putts by

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foot putts by amateur golfers found 696 made putts. a. Estimate the proportion of made 6-foot putts by professional golfers. Estimate the proportion of made 6-foot putts by amateur golfers (to 2 decimals). Professional golfers P1= .64 Amateur golfers P2= 796 / 1200 = .58 b. Which group had a better putting accuracy? professional c. What is the point estimate of the difference between the proportions of the two populations (to 2 decimals)? . 02 to .1 I used 2-prop2int calculation in ti-84.
Stat-calc-2propinterval What does this estimate tell you about the percentage of putts made by the two groups of golfers? - Select your answer -Professional golfers make 6% more 6-foot putts than the very best amateur golfersamateur golfers make 6% more 6-foot putts than the very best Professional golfersItem 5 d. What is the 95% confidence interval for the difference between the two population proportions? Interpret his confidence interval in terms of the percentage of putts made by the two groups of golfers (to 2 decimals). ( , ) 17. Adecco Workplace Insights Survey sampled men and women workers and asked if they expected to get a raise or promotion this year ( USA Today , February 16, 2012). Suppose the survey sampled 200 men and 200 women. If 104 of the men replied yes and 74 of the women replied yes, are the results statistically significant in that you can conclude a greater proportion of men are expecting to get a raise or a promotion this year? a. State the hypothesis test in terms of the population proportion of men and the population proportion of women? H 0 : p 1 - p 2 less than or equal to 0 H a : p 1 - p 2 greater than 0 b. What is the sample proportion for men? Round your answer to two decimal places.
104/200 = .52 What is the sample proportion for women? Round your answer to two decimal places. 74 / 200= .37 c. Use a .01 level of significance. What is the p -value? Round your answer to four decimal places. .0013 Chicago O'Hare and Atlanta Hartsfield-Jackson are the two busiest airports in the United States. The congestion often leads to delayed flight arrivals as well as delayed flight departures. The Bureau of Transportation tracks the on-time and delayed performance at major airports ( Travel & Leisure , November 2006). A flight is considered delayed if it is more than 15 minutes behind schedule. The following sample data show the delayed departures at Chicago O'Hare and Atlanta Hartsfield-Jackson airports. Excel File: data10-33.xls a. State the hypotheses that can be used to determine whether the population proportions of delayed departures differ at these two airports. H 0 : p 1 - p 2 - Select your answer -greater than 0greater than or equal to 0less than 0less than or equal to 0equal to 0not equal to 0Item 1 H a : p 1 - p 2 - Select your answer -greater than 0greater than or equal to 0less than 0less than or equal to 0equal to 0not equal to 0Item 2 b. What is the point estimate of the proportion of flights that have delayed departures at Chicago O'Hare (to 2 decimals)?
.28 c. What is the point estimate of the proportion of flights that have delayed departures at Atlanta Hartsfield-Jackson (to 2 decimals)?

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• Fall '14
• Statistics, Standard Deviation, Chapter 10, Null hypothesis, Statistical hypothesis testing, Cengage Learning, Cengage Now, Cengagenowchapter10, Cengagech10

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