统计与概率
数据分析、概率分布、假设检验与统计方法。
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a toy company is studying the average demand for one of their new dolls…
33
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the scatter plot below contains a set of data points. identify the corr…
Strong positive correlation
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the scatter plot below contains a set of data points. identify the corr…
Since the data points show a pattern where an increase in the response variable is associated with a decrease in the explanatory variable (negative direction) and the points are c…
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review the sixth paragraph. does this mean that schools should require …
There is no evidence that it improves test scores. It is a religious practice.
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the scatter plot below contains a set of data points. identify the corr…
No correlation (Since the data points are too scattered to show a clear positive or negative linear relationship. If we assume the options are only about positive/negative and str…
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review the fifth paragraph. 5 stress in particular is something mindful…
Healthy stress helps people face challenges, while toxic stress is overwhelming.
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the scatter plot below contains a set of data points. identify the corr…
Strong positive correlation
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find the correlation coefficient $r$ of the data below. round your answ…
\(-0.58\)
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find the correlation coefficient r of the data below. round your answer…
\(-0.85\)
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find the correlation coefficient r of the data below. round your answer…
\(-0.64\)
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if you are unsure about whether or not to include a citation because yo…
B. You should include a citation anyway
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akira is redecorating her bedroom. she misread the markings on her rule…
8.3%
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how would you describe the meaning of alliteration? (1 point) when a pa…
When several words in a short section begin with the same sound.
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compare the variability of the data sets. the range for phoebe is great…
The IQR for Phoebe is greater than the IQR for Chana.
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consider the following fallacy. explain why the fallacy applies to the …
C. You want to order a pizza for dinner, but your roommate does not want to order a pizza. Therefore, you should order half of a pizza.
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compare the variability of the data sets. the range for phoebe is the r…
greater than
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consider the following fallacy. explain why the fallacy applies to the …
A. Let \(X\) be no tax cut and \(Y\) be a tax cut. A small tax cut lies between no tax cut and a tax cut. Let \(Z\) be a small tax cut.
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complete each statement. the youngest reader bought a fantasy novel. fo…
\(25\)
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a bookstore owner collects data on the ages of people who buy science f…
The youngest reader could have bought either a Science Fiction or a Fantasy novel.
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timothy collects data on the weights of watermelons at two farm stands.…
1. True 2. True 3. False 4. True
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timothy collects data on the weights of watermelons at two farm stands.…
1. False 2. True 3. False
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timothy collects data on the weights of watermelons at two farm stands.…
- "The heaviest watermelon is at Stand A": False - "The median weight for Stand A is greater than the median weight for Stand B": True
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timothy collects data on the weights of watermelons at two farm stands.…
True
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a group of campers called the trailblazers hike a trail. each camper re…
The Trailblazer’s IQR is larger than the Pathfinder’s IQR. That means the Trailblazer’s times are more variable than the Pathfinder’s times.
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consider the following fallacy explain why the fallacy applies to the e…
- First part: D. Let \(X\) be that it rained on a day. This argument claims that \(X\) has been occurring more than it should, so it will come to an end soon. - Second part: A. A …
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sara is practicing speed pole climbing. the data show her times in seco…
Sara's IQR is smaller than Christa's IQR. That means that Sara's practice times are less variable than Christa's practice times.
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sara is practicing speed pole climbing. the data show her times in seco…
\(1.5\)
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read the excerpt from the odyssey. my ship? poseidon lord, who sets the…
Odysseus does not want to reveal their only means of escape.
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sara is practicing speed pole climbing. the data show her times in seco…
\(4\)
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the dot plot and the box plot represent the same data set. the dot plot…
The median is closer to the left side of the box. The left line segment (whisker) is longer than the right line segment (whisker).
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(consider the vertex you found in the previous problem) a rocket is lau…
the rocket's height at it's peak
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the dot plot and the box plot represent the same data set. the dot plot…
The median is closer to the left side of the box. The right whisker line segment is longer than the left whisker line segment.
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(consider the vertex you found in the previous problem) a rocket is lau…
how long the rocket has been in the air at it's peak
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the dot plot and box plot show the amount of time it took all students …
The teacher was correct because \(100\%\) of the students completed the homework assignment in less than 30 minutes.
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the dot plot and box plot show the amount of time it took all students …
From the upper quartile to the maximum
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the dot plot and box plot show the amount of time it took all students …
From the upper quartile to the maximum
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the dot plot and box plot show the amount of time it took all students …
From the upper quartile to the maximum
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the teacher wants the story to take most students 15 minutes or less to…
Most students **do** finish the story in 15 minutes or less. The teacher **does not need to** choose a different story.
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tate says there are more data from the minimum to the lower quartile th…
Tate is incorrect because each section of the box plot represents an equivalent portion of the data set.
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which type of data display shows the minimum and maximum values of its …
Box Plot, Frequency Table, Dot Plot.
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which type of display can be used to find the total number of values in…
Dot Plot, Frequency Table, Histogram.
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decide if the description is true for each type of data display. you ca…
- Shows each individual data value: Dot plot - Shows the minimum and maximum data values: Dot plot, Box plot - Splits the data into 4 equivalent portions: Box plot
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the dot plot and box plot represent the same set of data. puppy size pu…
- **Shows each individual data value**: Dot plot - **Shows the minimum and maximum data values**: Dot plot, Box plot
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the following data are the daily round - trip distances to school (in k…
\(0\) \(\vert\) \(4,5,5,6,6,7,9,9,9\) \(1\) \(\vert\) \(1,1,4,6,7,7,7,8\) \(2\) \(\vert\) \(2,2,6,6,8,9,9\) \(3\) \(\vert\) \(0,1,2,6,9\) \(4\) \(\vert\) \(1,5\)
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the dot plot and box plot represent the same set of data. decide if the…
Dot plot.
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which box plot represents the data? heights of trees
The box - plot with minimum at \(6\), \(Q_1 = 8\), median \(=9\), \(Q_3 = 10\) and maximum at \(11\) (the third box - plot in the given options) represents the data.
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find the critical value ( z_{c} ) necessary to form a confidence interv…
\(1.48\)
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the box plot shows the distribution of prices of the same sneakers at s…
1. Supported 2. Supported 3. Not Supported
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the box plot shows the distribution of prices of the same sneakers at s…
1. Supported 2. Supported
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the box plot shows the distribution of prices of the same sneakers at s…
Supported
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the box plot shows the distribution of the scores on a science test. de…
- “The range of the data set is 12”: False - “The median test score is 84”: False - “About half the test scores are between 84 and 91”: True
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the box plot shows the distribution of the scores on a science test. de…
The first statement (The range of the data set is 12) is True. The second statement (The median test score is 84) is False.
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the box plot shown represents the amount of time it took all the studen…
25%
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the box plot shown represents the amount of time it took all the studen…
25%
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what role did timbuktu play in the kingdoms of ghana, mali, and songhai…
It served as an important hub of trade and education for all three empires.
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what role did timbuktu play in the kingdoms of ghana, mali, and songhai…
It served as an important hub of trade and education for all three empires.
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data (x,y) for the total number (in thousands) of college - bound stude…
\(a\approx1.3\), \(b\approx36.2\), \(c = 1048\). The number of students in 2023 is approximately \(2547.6\) (in thousands).
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kathleen is growing tomatoes in her garden. this graph shows the weight…
\(\frac{1}{4}\)
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the members of a school club sell bracelets to earn money for a project…
The box - plot has a minimum at \(16\), \(Q1\) at \(18\), median at \(20\), \(Q3\) at \(21\), and maximum at \(25\) with the box connecting \(18 - 20 - 21\) and whiskers from \(16…
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carson has 9 tomato plants. he counts the number of tomatoes on each pl…
Plot points at \(0\) (min), \(2\) (Q1), \(2\) (median), \(6.25\) (Q3), and \(7\) (max) on the number line and then draw the box plot with a box from \(Q1 = 2\) to \(Q3=6.25\), a l…
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carson has 9 tomato plants. he counts the number of tomatoes on each pl…
Minimum \(= 0\) tomatoes, Maximum \(= 7\) tomatoes
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carson has 9 tomato plants. he counts the number of tomatoes on each pl…
Q1 = \(2\) tomatoes, Q3 = \(6.5\) tomatoes
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the first equation in the system presented here represents the path of …
The boats' paths do not cross each other.
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carson has 9 tomato plants. he counts the number of tomatoes on each pl…
\(5\)
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ms. allen runs a movie club after school on fridays. for 14 fridays, sh…
Minimum \( = 5\) students, Maximum \(=11\) students
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median = 9 students what is the lower quartile, q1, of the data? q1 = s…
7 students
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what is the median number of students? median = students 5 5 7 7 7 8 8 …
\(9\)
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jackson collects data on the price of a quart of milk at 8 different st…
About 25% of the prices are less than $1.62$. About 25% of the prices are more than $1.84$.
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jackson collects data on the price of a quart of milk at 8 different st…
Lower quartile \( (Q1)=\$1.62 \), Upper quartile \( (Q3)=\$1.84 \)
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jackson collects data on the price of a quart of milk at 8 different st…
\(1.75\)
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shanice collects data on the number of minutes a scooter is rented by d…
About $\frac{1}{2}$ of the riders rented the scooter for more than 26 minutes. About $\frac{3}{4}$ of the riders rented the scooter for less than 38 minutes.
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median = 26 minutes 14 16 17 19 22 26 29 37 38 42 47 lower quartile (q1…
\(38\)
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after they start road trip, going to take turns driving the car so that…
1. their 2. they're 3. (This is an error in the question as the correct word for meaning is "no one" but not in the list. If we assume a wrong fit, maybe it's a trick question, bu…
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shanice collects data on the number of minutes a scooter is rented by d…
\(17\)
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shanice collects data on the number of minutes a scooter is rented by d…
\(26\)
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sydney collects data on the number of hours it takes her classmates to …
6
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sydney collects data on the number of hours it takes her classmates to …
- For the first question: 27 classmates - For the second question: 15 classmates - For the third question: 5 classmates
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sydney collects data on the number of hours it takes her classmates to …
5 classmates
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sydney collects data on the number of hours it takes her classmates to …
15
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sydney collects data on the number of hours it takes her classmates to …
27
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question 1 1 pts for the following parameters, find the critical value …
\(2.365\)
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legend asks the students in his class, \how many minutes does it take y…
\(6\) to \(9\) minutes.
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legend asks the students in his class, \how many minutes does it take y…
The distribution is symmetric.
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question 1 for the following parameters, find the critical value t from…
\(2.365\)
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legend asks the students in his class, \how many minutes does it take y…
14 minutes
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based on the histogram, what is the longest time a student can take? 8 …
15 minutes
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legend asks the students in his class, \how many minutes does it take y…
\(5\)
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legend asks the students in his class, \how many minutes does it take y…
\(5\) students
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legend asks the students in his class, \how many minutes does it take y…
\(20\)
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nina collects data on the number of hours it takes her classmates to co…
B. \(10\) to \(11\) hours
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based on the histogram, what is the longest time a classmate can take? …
D. 16 hours
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nina collects data on the number of hours it takes her classmates to co…
\(26\)
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ruby collects data on the number of hours it takes her classmates to co…
C. 14 to 15 hours
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based on the histogram, what is the longest time a classmate can take? …
18 hours
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ruby collects data on the number of hours it takes her classmates to co…
9
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ruby collects data on the number of hours it takes her classmates to co…
\(28\) classmates
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ruby collects data on the number of hours it takes her classmates to co…
\(26\)
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the director of a community sports camp records the daily attendance. t…
- Peak: \(80\) to \(89\) campers. - Distribution description: The distribution is skewed left.
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the director of a community sports camp records the daily attendance. t…
\(80\) to \(89\) campers
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the director of a community sports camp records the daily attendance. t…
16 days