Sophia Unit 2 Milestone 2 Introduction To Statistics Questions And Answers

Sophia Unit 2 Milestone 2 Introduction To
Statistics Questions And Answers

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1●

A study in which results are measured without intervention from the
researcher is called a(n) __________.



Pilot study
●



Controlled experiment
●



Observational study




Simple random sample
●



RATIONALE

Recall that an observational study is one in which there is no control
over the setting in any way.



CONCEPT
→ Observational Studies and Experiments


2●

,The following shows the Consumer Price Index (CPI) for the years 2000-
2005. All of the values use a reference year of 1983.




Which of the following is true about the CPI, based on the
information?

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$100 in 2002 would be equivalent to
UNIT 1$189.70
— MILESTONE
in 2004. 1
●




$100 in 2000 would be equivalent to
$189.7 in 2004. $100 in 2004
● would have been
● worth $189.70 in
1983.
RATIONALE
$100 in 1983 would be equivalent to
$189.70 in 2004. Recall that the
CPI allows us to
transform values
from some year
to values in another year. The value of the CPI in the base year is
100. Since the CPI in 2004 is 189.7, this means that for $100 in the
base year of 1983 is equivalent to $189.7 in 2004.


CONCEPT
→ Index Number and Reference Value

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3●

It’s Saturday afternoon, and Denise is going shopping. She stops by a
department store because she needs a new pair of shoes. She has
picked out three styles that she likes. The store associate asks, “What is
your shoe size?”

Which type of question has the store associate asked?