Hopefully you're feeling confident about the test today! We'll see! (Don't stress!)
Get a 100% on the take home quiz! Use your notes!
Here are the take home quiz questions in case you forgot/lost/didn't get them (each @ 2 points):
1. What is the null hypothesis? What is the alternative hypothesis? (explain what each is, don’t simply provide “Ho” and “Ha”).
2. What are the four components of conducting a hypothesis test? In other words, what are the four steps to this process?
3. What is the difference between a one-sided test and a two-sided hypothesis test?
4. What are the conditions for inference for a hypothesis test for proportions?
5. Define p-value.
6. How do we determine if we reject the null hypothesis? If we fail to reject the null hypothesis? (Reference p-value and significance level).
7. What mathematics (work) do we need to show in obtaining our p-value?
Friday, March 22, 2013
Thursday, March 21, 2013
STUDY!
Study tonight! Tomorrow's test is a big deal! 70 points! Make me proud!
If you'd like, here are some review questions you can use to study for the test. These questions pretty much summarize everything you need to know for tomorrow:
Mr. Carofano plans to estimate the true percentage of EHHS underclassmen who plan to take AP Statistics. He takes a sample of 120 underclassmen, and 29 of them plan to take AP Statistics. Based on past data, it is believe that approximately 10% of underclassmen take AP Statistics.
1. Verify that the conditions for inference are satisfied.
2. Calculate the margin of error for this sample (98% confidence).
3. Estimate the true percentage of underclassmen who plan to take AP Stat using a 98% confidence interval.
4. Interpret the meaning of this interval.
5. Explain the meaning of “98% confidence.”
6. How can Mr. Carofano narrow the width of his interval? What would cause the interval to widen?
7. Based on your interval, do you believe the percentage of underclassmen who plan to take AP Stat has risen?
8. Is there significant evidence to suggest that the percentage of underclassmen taking AP Stat is rising? Conduct and appropriate test at the 5% level of significance. (hypotheses, conditions, math, conclusion).
9. Explain the meaning of the p-value, in context.
10. If the percentage of students in AP Statistics has risen, more sections of the course will be offered and another teacher will be hired. If not, there will only be 3 classes offered.
a. Identify the meaning of a Type I and Type II error in context.
b. Identify a consequence of each.
11. The probability of a Type I error is 5%, and the probability of a Type II is 15%. Calculate the power.
12. Explain the meaning of the power of this test, in context.
13. If Mr. Carofano wants a margin of error of only 4%, what sample size should be used (at 98% confidence)?
If you'd like, here are some review questions you can use to study for the test. These questions pretty much summarize everything you need to know for tomorrow:
Mr. Carofano plans to estimate the true percentage of EHHS underclassmen who plan to take AP Statistics. He takes a sample of 120 underclassmen, and 29 of them plan to take AP Statistics. Based on past data, it is believe that approximately 10% of underclassmen take AP Statistics.
1. Verify that the conditions for inference are satisfied.
2. Calculate the margin of error for this sample (98% confidence).
3. Estimate the true percentage of underclassmen who plan to take AP Stat using a 98% confidence interval.
4. Interpret the meaning of this interval.
5. Explain the meaning of “98% confidence.”
6. How can Mr. Carofano narrow the width of his interval? What would cause the interval to widen?
7. Based on your interval, do you believe the percentage of underclassmen who plan to take AP Stat has risen?
8. Is there significant evidence to suggest that the percentage of underclassmen taking AP Stat is rising? Conduct and appropriate test at the 5% level of significance. (hypotheses, conditions, math, conclusion).
9. Explain the meaning of the p-value, in context.
10. If the percentage of students in AP Statistics has risen, more sections of the course will be offered and another teacher will be hired. If not, there will only be 3 classes offered.
a. Identify the meaning of a Type I and Type II error in context.
b. Identify a consequence of each.
11. The probability of a Type I error is 5%, and the probability of a Type II is 15%. Calculate the power.
12. Explain the meaning of the power of this test, in context.
13. If Mr. Carofano wants a margin of error of only 4%, what sample size should be used (at 98% confidence)?
Wednesday, March 20, 2013
Wednesday!
Almost to our test!
*It turns out my meeting is at 3:30 tomorrow, so I can stay until like 2:50 if you have questions...*
Tonight, please complete the following (and start studying!)
Page 491: 1, 3, 9, 21 (I may add one more tomorrow
Here are the review questions we looked at after school:
Mr. Carofano plans to estimate the true percentage of EHHS underclassmen who plan to take AP Statistics. He takes a sample of 120 underclassmen, and 29 of them plan to take AP Statistics. Based on past data, it is believe that approximately 10% of underclassmen take AP Statistics.
1. Verify that the conditions for inference are satisfied.
2. Calculate the margin of error for this sample (98% confidence).
3. Estimate the true percentage of underclassmen who plan to take AP Stat using a 98% confidence interval.
4. Interpret the meaning of this interval.
5. Explain the meaning of “98% confidence.”
6. How can Mr. Carofano narrow the width of his interval? What would cause the interval to widen?
7. Based on your interval, do you believe the percentage of underclassmen who plan to take AP Stat has risen?
8. Is there significant evidence to suggest that the percentage of underclassmen taking AP Stat is rising? Conduct and appropriate test at the 5% level of significance. (hypotheses, conditions, math, conclusion).
9. Explain the meaning of the p-value, in context.
10. If the percentage of students in AP Statistics has risen, more sections of the course will be offered and another teacher will be hired. If not, there will only be 3 classes offered.
a. Identify the meaning of a Type I and Type II error in context.
b. Identify a consequence of each.
11. The probability of a Type I error is 5%, and the probability of a Type II is 15%. Calculate the power.
12. Explain the meaning of the power of this test, in context.
13. If Mr. Carofano wants a margin of error of only 4%, what sample size should be used (at 98% confidence)?
*It turns out my meeting is at 3:30 tomorrow, so I can stay until like 2:50 if you have questions...*
Tonight, please complete the following (and start studying!)
Page 491: 1, 3, 9, 21 (I may add one more tomorrow
Here are the review questions we looked at after school:
Mr. Carofano plans to estimate the true percentage of EHHS underclassmen who plan to take AP Statistics. He takes a sample of 120 underclassmen, and 29 of them plan to take AP Statistics. Based on past data, it is believe that approximately 10% of underclassmen take AP Statistics.
1. Verify that the conditions for inference are satisfied.
2. Calculate the margin of error for this sample (98% confidence).
3. Estimate the true percentage of underclassmen who plan to take AP Stat using a 98% confidence interval.
4. Interpret the meaning of this interval.
5. Explain the meaning of “98% confidence.”
6. How can Mr. Carofano narrow the width of his interval? What would cause the interval to widen?
7. Based on your interval, do you believe the percentage of underclassmen who plan to take AP Stat has risen?
8. Is there significant evidence to suggest that the percentage of underclassmen taking AP Stat is rising? Conduct and appropriate test at the 5% level of significance. (hypotheses, conditions, math, conclusion).
9. Explain the meaning of the p-value, in context.
10. If the percentage of students in AP Statistics has risen, more sections of the course will be offered and another teacher will be hired. If not, there will only be 3 classes offered.
a. Identify the meaning of a Type I and Type II error in context.
b. Identify a consequence of each.
11. The probability of a Type I error is 5%, and the probability of a Type II is 15%. Calculate the power.
12. Explain the meaning of the power of this test, in context.
13. If Mr. Carofano wants a margin of error of only 4%, what sample size should be used (at 98% confidence)?
Tuesday, March 19, 2013
Tuesday HW
I think I'm going to have to move your test to Friday....
Tonight, please complete the following:
Page 491: 12, 14, 27, 28
**We will have an after school review for the test tomorrow**
If you tried to get ahead, don't worry...this is tomorrow's (Wednesday) homework:
Page 491: 1, 3, 9, 21 (I may add one more tomorrow)
Tonight, please complete the following:
Page 491: 12, 14, 27, 28
**We will have an after school review for the test tomorrow**
If you tried to get ahead, don't worry...this is tomorrow's (Wednesday) homework:
Page 491: 1, 3, 9, 21 (I may add one more tomorrow)
Monday, March 18, 2013
Monday Funday!
We will have a TEST on inference for one proportion (one-proportion z intervals and tests) THURSDAY. On Friday we'll begin some new stuff.
Tonight, please complete the following in your textbook:
Page 492: 11, 13, 17, 19 (**Skip any questions about the power of a test, as we didn't get to those yet...11e, 17def, 19e**)
Tuesday's HW (if you want a head start...)
Page 491: 1, 3, 9, 21 (I may add one more tomorrow)
Tonight, please complete the following in your textbook:
Page 492: 11, 13, 17, 19 (**Skip any questions about the power of a test, as we didn't get to those yet...11e, 17def, 19e**)
Tuesday's HW (if you want a head start...)
Page 491: 1, 3, 9, 21 (I may add one more tomorrow)
Friday, March 15, 2013
Weekend HW!
1. Enjoy your weekend! Play outside!
2. Your job is to complete the 25 multiple choice questions we started in class. If you were absent, I still expect you to do this! You can find these questions under the classroom powerpoints and assignments link; scroll down to assignments to find "Ch. 19-20 MC (Due Mon 3/19).".
See you all Monday!
PS....we'll probably have a 15 minute, 1 question quiz on Tuesday--an entire one-proportion z-test!
2. Your job is to complete the 25 multiple choice questions we started in class. If you were absent, I still expect you to do this! You can find these questions under the classroom powerpoints and assignments link; scroll down to assignments to find "Ch. 19-20 MC (Due Mon 3/19).".
See you all Monday!
PS....we'll probably have a 15 minute, 1 question quiz on Tuesday--an entire one-proportion z-test!
Thursday, March 14, 2013
Thursday HW!
Tonight, two hypothesis tests...
Please complete the two tests (about fair coins and gender selection) provided in class. If you were absent or lost yours, I've provided the contexts below. (Make sure you complete all four steps for each problem!)
Tomorrow we'll work through some multiple choice questions in groups and complete a two tailed test.
Then its on to chapter 21 Monday!
Tonight's HW:
1. Advances in medical care such as prenatal ultrasound examination now make it possible to determine a child’s sex early in pregnancy. Some fear that some cultures may use this to select their children’s gender. A study from Punjab, India reports that in 1993 in one hospital 56.9% of 550 live births were boys. Medically, male babies are slightly more common than females; for this region, our baseline is 51.7% male live births. Do you believe parents may be selecting gender?
2. You want to test if a coin is fair by examining the percent of heads that you see. You flip the coin 244 times, and it lands on heads 105 times. Is there statistical evidence to suggest that the coin is not fair? (*Two-tailed test*)
Please complete the two tests (about fair coins and gender selection) provided in class. If you were absent or lost yours, I've provided the contexts below. (Make sure you complete all four steps for each problem!)
1. Write Hypotheses
2. Check Conditions
3. Do the math (use your calculator, then show the work!)
4. Write your conclusion
Tomorrow we'll work through some multiple choice questions in groups and complete a two tailed test.
Then its on to chapter 21 Monday!
Tonight's HW:
1. Advances in medical care such as prenatal ultrasound examination now make it possible to determine a child’s sex early in pregnancy. Some fear that some cultures may use this to select their children’s gender. A study from Punjab, India reports that in 1993 in one hospital 56.9% of 550 live births were boys. Medically, male babies are slightly more common than females; for this region, our baseline is 51.7% male live births. Do you believe parents may be selecting gender?
2. You want to test if a coin is fair by examining the percent of heads that you see. You flip the coin 244 times, and it lands on heads 105 times. Is there statistical evidence to suggest that the coin is not fair? (*Two-tailed test*)
Subscribe to:
Posts (Atom)