BIOL 243 Final Exam complete solutions Questions And Answers Tested And Verified Answers GRADED A+ latest update

BIOL 243 Final Exam complete solutions
Questions And Answers Tested And
Verified Answers GRADED A+ latest update



MULTIPLE CHOICE – Write a single answer in the space provided
using UPPERCASE letters. Illegible answers will be marked incorrect.
You DO NOT need to justify your answer.

1) You want to plant a butterfly garden on the balcony of your apartment, but
are not sure what species of milkweed is best suited for pots. You grow 10
plants of the ‘Common Milkweed’ and 10 plants of a related species called the
‘Butterfly Weed’ and measure their height after 2 months. Which of the
following statements is about the descriptive statistics for your data? [1
mark]
I. A boxplot showing that the interquartile range for the common
milkweed is greater than for the butterfly weed.
II. The difference in median height between the two species is 3.2 cm.
III. The height difference between the two species is unexpected
from sampling error.

A. I only.
B. II only.
C. I and II.
D. I and III.
E. II and III.

ANSWER: C

STUDY A Use the following study to answer questions 2, 3, 4 & 5.
Airbnb is an accommodation-sharing platform that relies heavily on guest
ratings. Interestingly, the distribution of ratings (shown below) is not equal
across the possible scores and is also not Normally distributed (5.0 is
excellent, 1.0 is poor). The proportion of accommodations in each category
is:

Rank 5.0 is 46.3%
Rank 4.5 is 41.1%
Rank 4.0 is 10.3%
Rank 3.5 is 1.7%
Rank 3.0 is 0.3%
Rank 2.5 is 0.2%

1




BIOL 243 Final Exam complete solutions
Questions And Answers Tested And
Verified Answers GRADED A+ latest update

, BIOL 243 Final Exam complete solutions
Questions And Answers Tested And
Verified Answers GRADED A+ latest update

Rank 2.0 is 0.1%
Rank 1.5 is 0%
Rank 1.0 is 0%




2) If you took repeated samples of potential accommodations for STUDY A, which
of the following statements about the distribution of the mean ratings would
be INCORRECT? [1 mark]
A. Since the data are not Normally distributed, the distribution of
mean ratings cannot be Normally distributed.
B. The mean of the distribution is the same as the mean of the
population distribution.
C. The variance of the distribution depends on sample size.
D. Sampling error causes the variation in the distribution.
E. The standard deviation of the distribution can be estimated from a
single sample.

ANSWER: A

3) You collect a sample of 32 accommodations for STUDY A and find the following
information about the ratings: Mean=4.2, Median=4.5, SD=0.2, IQR=1.5. Based
on this information, what is the estimated standard deviation of the
distribution of mean ratings? [1 mark]
A. 0 ≤ ANSWER < 0.05
B. 0.05 ≤ ANSWER < 0.1
C. 0.1 ≤ ANSWER < 0.2
D. 0.2 ≤ ANSWER < 0.5
E. 0.5 ≤ ANSWER < 1.0

ANSWER: A

4) Following up on STUDY A, some hosts leave small gifts for their guests such
as homemade baked goods or a bottle of wine. If, on average, a host leaves
a gift 30% of the time, what is the probability that you will have at least one
accommodation with a gift if you booked 10 accommodations? [1 mark]
A. 0 ≤ ANSWER < 0.2
B. 0.2 ≤ ANSWER < 0.4
C. 0.4 ≤ ANSWER < 0.6
D. 0.6 ≤ ANSWER < 0.8
E. 0.8 ≤ ANSWER < 1.0

ANSWER: E

5) What is the probability that a randomly selected accommodation in STUDY A

BIOL 243 Final Exam complete solutions
Questions And Answers Tested And
Verified Answers GRADED A+ latest update

, BIOL 243 Final Exam complete solutions
Questions And Answers Tested And
Verified Answers GRADED A+ latest update
will have a rating that is less than 4.0? [1 mark]
A. 0 ≤ ANSWER < 0.2
2

B. 0.2 ≤ ANSWER < 0.4




BIOL 243 Final Exam complete solutions
Questions And Answers Tested And
Verified Answers GRADED A+ latest update