Hypothesis Wisdom

In class students learned about the relationship between confidence intervals and hypothesis tests.  Students also learned about alpha levels, beta levels and Type I and Type II error.


The notes are attached and the homework is listed below.

Notes - Hypothesis Wisdom

HW - pg. 478 (26, 27) and pg. 501 (19-22)
         Read Chapter 22 (504 - 518)

Hypothesis Testing - Sample proportions - Continued

In class we continued to work on hypothesis testing.  Remember to complete all the steps when conducting a confidence interval:

1.  Hypothesis - Null/Hypothesis
2.  Test - Check assumptions/conditions; state test to be used
3.  Mechanics - z -score, p-value
4. Conclusion - reject/fail to reject null; state Confidence Interval (CI)

Notes - Hypothesis Testing Cont.

HW - Quiz Review - CIs and HTs
          Read Chapter 21

Hypothesis Testing

In class students were introduced to hypothesis testing.  There will be a number of hypothesis tests students will need to be familiar with upon completing the course-we will start with the "1 proportion z-test."  Remember when conducting a hypothesis test you need to complete the following :

1) Hypothesis - state null/alternative
2) Test - identify test to be completed (1 proportion z-test)
3) Mechanics - (z-score/p-value)
4) Conclusion - (reject/fail to reject null; include confidence interval)


The notes are attached below; there is no homework.

Notes - Choosing Sample Size

Notes - Hypothesis Testing - 1 proportion Z-Test

Confidence Intervals for Sample Proportions

In class students learned how to create a confidence interval for sample proportions (on calc. - 1prop-Zint).  Remember, whenever you are creating a confidence interval, check the appropriate assumtions and conditions (10 RIBS..thank you Jenae).  Afterwards, we can use the calculator to calculate the appropriate confidence interval.  Finally,  you must also interpret the interval correctly.   Give we never know the p, or the true proportion, we should state for example:

" I am 95% confident that the true proportion of high students who like Taylor Swift is between 62 and 71%."


The homework is listed below and the notes are attached.

Notes - Confidence Intervals for Sample Proportions

HW - pgs. 454-456 (1-11 odd, 21, 23, 25)
          Read Chapter 20 - Hypothesis Tests (pgs. 459-474)

Sampling Distributions for Sample Means

In class students learned about sampling distributions for sampling means.

The homework is listed below and the notes are attached.

Notes - Sampling Distributions for Sample Means

HW - pgs. 432-434 (29-32, 37, 41)
         Read Chapter 19 (435 - 452)