Weekend HW

This weekend, please complete the following (due Tuesday):

• Sign up for Remind if you didn't yet! (if you don't have a phone ignore this)
• Text @ehapstat to 81010
• OR, on a smartphone open your web browser and go to : rmd.at/ehapstat
• Please complete the "Analyzing Context" worksheet provided in class (or below)
• Answer questions a-e for each of the 5 scenarios. (You do not have to use complete sentences).
• We will have a quiz next Wednesday based on this homework: you will have one context and be asked to answer the same questions as the homework!

On Tuesday we'll start to get into chapter 4, back to our histograms and boxplots. We will have a test next Friday on everything we've covered from the summer academy to present!

• If you were absent from the summer academy I will be after school on Wednesday, 9/7 for a makeup session. If you do not attend this session you will be responsible to figure everything out on your own! (You're also welcome to come even if you were here over the summer and want some more histogram/boxplot practice!)

Here are the questions/contexts for your homework in case you lost yours (or don't have it on you):

For each of the scenarios provided, identify each of the following:

a)      Who conducted the study?

b)      When and where did this study take place?

c)       What data is being collected? In other words, what variables are being measured?

a.      For each variable that is being measured/recorded, identify whether it is quantitative or categorical.

d)      Why is the data being collected? (You may have to infer here—take your best guess. This may not explicitly be stated in the scenario).

e)      How was the data collected? Was an experiment conducted? Was the information retrieved from the internet or a database? Were people surveyed? Was something measured? (Again, this may not be explicitly stated—THINK!)

Scenarios:

1.       Medical researchers at a large city hospital investigating the impact of prenatal care on newborn health collected data from 882 births during 1998-2000. They kept track of the mother’s age, the number of weeks the pregnancy lasted, the type of birth (cesarean, induced, natural), the level of prenatal care the mother had (none, minimal, adequate), the birth weight and sex of the baby, and whether the baby exhibited health problems (none, major, minor).

2.       The State Education Department requires local school districts to keep these records on all students: age, race or ethnicity, days absent, current grade level, standardized test scores in reading and mathematics, and any disabilities or special educational needs the student may have.

3.       A start-up company is building a database of customers and sales information. For each customer it records name, ID number, region of the country (1 = East, 2 = South, 3 = Midwest, 4 = West), date of last purchase, amount of purchase, and item purchased.

4.       The Gallup Poll conducted a representative telephone survey of 1180 American voters during the first quarter of 1999. Among the reported results were the voter’s region (Northeast, South, etc.), age, party affiliation, and whether or not the person had voted in the 1998 election.

5.       Scientists at a major pharmaceutical firm conducted an experiment to study the effectiveness of an herbal compound to treat the common cold. They exposed each patient to a cold virus, then gave them either the herbal compound or a sugar solution known to have no effect on colds. Several days later they assessed each patient’s condition using a cold severity scale ranging 0-5. They found no evidence of the benefits of the compound.