Quiz 3: probability and statistics analysis môn Xác suất thống kê| Trường Đại học Ngoại Thương

5/15/23, 3:37 PM Quiz 3 on chapter 3 Quiz 3 on chapter 3 Tổng i đ ểm10/10 Email * k61.2214155247@ftu.edu.vn 0/0 điểm Full name * Trần Bảo Trân ID * 2214155247
Questions in this section are based on the following graphs 4/4 điểm
https://docs.google.com/forms/d/e/1FAIpQLSdLtiO2mG_xFIMnRSscjtMZZemhi05fbVQPmsjr52Yitu25ag/viewscore?viewscore=AE0zAgC7FYU2EAwYf9Fm… 1/6 5/15/23, 3:37 PM Quiz 3 on chapter 3
What is the approximate ratio of students earning a C to those earning a 2/2 * B ? 1:1 1:2 2:1 3:2 4:3
https://docs.google.com/forms/d/e/1FAIpQLSdLtiO2mG_xFIMnRSscjtMZZemhi05fbVQPmsjr52Yitu25ag/viewscore?viewscore=AE0zAgC7FYU2EAwYf9Fm… 2/6 5/15/23, 3:37 PM Quiz 3 on chapter 3
If all the students from Creede, and only those students, are earning A’s 1/1 *
and the rest of the grades are evenly distributed among students in the
other subdistricts, approximately how many students from Bayfield are earning B’s ? 225 306 50 150 75
If all the grades are evenly distributed throughout all districts and classes, 1/1 *
approximately how many students in De Beque are not earning a B ? 100 70 20 115 40 Numerical measures 6/6 điểm
https://docs.google.com/forms/d/e/1FAIpQLSdLtiO2mG_xFIMnRSscjtMZZemhi05fbVQPmsjr52Yitu25ag/viewscore?viewscore=AE0zAgC7FYU2EAwYf9Fm… 3/6 5/15/23, 3:37 PM Quiz 3 on chapter 3
Jim buys his school supplies in bulk. On one particular shopping trip he 2/2 *
bought 5 red pens at $1.29 each, 3 blue pens at $1.49 each, 6 green pens
at $1.79 each and 9 black pens at $0.99 each. What was the average cost
of a pen ? (correct to 2 decimal places) $1.29 $1.39 $0.99 $1.33
The United States can be divided into four geographical regions: 2/2 *
Northeast, South, Midwest, and West. The Northeast region consists of 9
states; the South region consists of 16 states; the Midwest consists of 12
states; and the West consists of 13 states. If a survey is to be
administered to the governors of 10 of the states and we want equal
representation for the states in each of the four regions, how many states
from the South should be selected ? Round to the nearest whole state. 4 5 2 3
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The owner of a farmer's market was interested in determining how many 2/2 *
oranges a person buys when they buy oranges. He asked the cashiers
over a weekend to count how many oranges a person bought when they
bought oranges and record this number for analysis at a later time. The
data is given below in the table. The random variable x represents the
number of oranges purchased and P(x) represents the probability that a
customer will buy x oranges. The variance of the number of oranges
purchased by a customer is (correct to 2 decimal places) 3.97 3.57 0.56 1.95
https://docs.google.com/forms/d/e/1FAIpQLSdLtiO2mG_xFIMnRSscjtMZZemhi05fbVQPmsjr52Yitu25ag/viewscore?viewscore=AE0zAgC7FYU2EAwYf9Fm… 5/6 5/15/23, 3:37 PM Quiz 3 on chapter 3
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