Weekend HW = 2 Tasks...

• *Chapter 18 Vocab Quiz will start class Tuesday!
• 1.) Complete the "bottom left slide" examples a and b. 
• Do the math, show the work, and check your answers below!
• I would recommend glueing? gluing? in the slide and putting this in your notebook!
• 
• Answers:
• a.) 0.9495
• b.) 0.10565
• 2.) Page 429-431: 15, 17, 25, 27, 35, 
• We should first check the conditions for each of these problems--but for this homework you can skip those and focus in on the math (otherwise this would take forever)
• For #15 we're asked for the probability that the newspaper's sample will predict defeat...
• This is the same as asking for the probability that the "% of the sample that support the budget is less than 50%" (because if less than half of the people support the budget it will be defeated)
• Any time we have to find a probability using a "% of a sample" we have to use a sampling distribution!
• For #17 we want to find the probability that the shipment will be accepted---this is the same as asking if the % of the sample that do not meet the standard is less than 5%!
• Since we're asked for a probability in regard to the "% of a sample" this is a sampling distribution question!
• For 25 consider yesterday'sexamples with rainfall amounts--not all parts (a,b,c,d) require the use of a sampling distribution!
• For 25c it asks you to "define the model"--this simply means to provide the shape, the value of the mean for the sampling distribution, and the value of the standard deviation for the sampling distribution
• Here's an example to help with the type of math in 15, 17:
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On Monday we'll wrap up chapter 18 and "cross our t's and dot our i's" as they say, finishing up with some more vocab and a couple more examples.

Then, on Tuesday we'll start with our chapter 18 vocab quiz before starting our exploration of confidence intervals (can't wait)!

Here's the chapter 18 vocab list so you can start studying:

• Sampling Distribution
• Sample Statistic
• Population Parameter
• Sampling Variability
• Sampling Distribution for Means (for what type of data)?
• Sampling Distribution for Proportions(for what type of data)?
• Know which conditions we use for each type of sampling distributino
• 10% Condition: how do we check it and why do we check it?
• Success/Failure Condition: how do we check it and why do we check it?
• Randomization condition: how do we check it and why do we check it?
• Large Enough Sample condition: how do we check it and why do we check it?
• Standard Error
• Central Limit Theorem
• Know how changing sample size affects standard deviation

Have an awesome weekend!