Sophia Learning STAT1001: Introduction to Statistics UNIT 1 — MILESTONE 1 Answered 2024/45.
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Course
STAT1001: Introduction to Statistics
Institution
STAT1001: Introduction To Statistics
Sophia Learning STAT1001: Introduction to Statistics UNIT 1 — MILESTONE 1 Answered 2024/45.
Attempt score 25/29.
1
25/29 that's 86% RETAKE
25 questions were answered correctly.
4 questions were answered incorrectly.
Jenae is able to purchase a different brand of coffee for half the ...
25 questions were answered correctly.
4 questions were answered incorrectly.
1
●
Jenae is able to purchase a different brand of
coffee for half the price from a new supplier.
She anticipated that her co-workers would
object to switching to the new brand, as they
were really partial to the coffee they have been
drinking so far. Indeed, when offered a taste
test of the old brand versus the new brand, her
co-workers unanimously rejected the new
brand.
Jenae's boss, Steven, pointed out that this
result was most likely due to the fact that the
taste test was not ________.
https://app.sophia.org/spcc/introduction-to-statistics-2/milestone_take_feedbacks/33730228 6/12/24, 11 12 AM
Page 1 of 44
:
, controlled
●
blinded
#
randomized
●
replicated
●
RATIONALE
Since they didn't keep the participants
unaware of what brand they were tasting, this
could influence the findings. So, the rejection
of the new brand was likely due to not
blinding them from what brand they were
drinking.
CONCEPT
→ Blinding
Report an issue with this question
2
●
On a candy production line, 3% of bags are
https://app.sophia.org/spcc/introduction-to-statistics-2/milestone_take_feedbacks/33730228 6/12/24, 11 12 AM
Page 2 of 44
:
, overfilled. An employee randomly selects 100
bags and finds that 5% are overfilled. A second
employees takes another random sample of
250 bags and finds that 2% are overfilled.
Which of the following explains why there is a
difference between the two percentages?
The samples were
● not random samples.
The sample sizes
were both too small,
which is why they
●
both obtained figures
different than 3%
Random error; the
numbers were
different due to
#
variability inherent in
sampling.
Both samples
suffered from non-
●
response bias.
https://app.sophia.org/spcc/introduction-to-statistics-2/milestone_take_feedbacks/33730228 6/12/24, 11 12 AM
Page 3 of 44
:
, RATIONALE
When sampling, there is always some
variability that occurs. So,
although the sample values are different from
each other and the 3% true value, since they
were randomly chosen, the differences are
simply due to the variability that comes from
sampling and not due to some systematic
bias. As the sample size would increase we
would expect the variability to get smaller.
CONCEPT
→ Random and Systematic Errors
Report an issue with this question
3
●
Jenae brewed each coffee flavor using
an identical coffee maker model, the same
water source, and the same mass of ground
coffee.
Jenae used an aspect of experimental design
known as ________ when she took these
actions.
https://app.sophia.org/spcc/introduction-to-statistics-2/milestone_take_feedbacks/33730228 6/12/24, 11 12 AM
Page 4 of 44
:
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