統計與機率
資料分析、機率分佈、假設檢定與統計方法。
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a professor records the following final grades in one course. construct…
For Grade A: Frequency: \( 3 \) Relative frequency: \( 12.5\% \) Cumulative frequency: \( 3 \)
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an auto transmission manufacturer receives ball bearings from two diffe…
57
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passage tools show hide the above graph shows the payment scheme that c…
The least amount in thousand dollars that a salesman will receive in a month.
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an auto transmission manufacturer receives ball bearings from two diffe…
\( 71 \) (or \( 71\% \))
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an auto transmission manufacturer receives ball bearings from two diffe…
mean = 16.32 s = 0.11
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an auto transmission manufacturer receives ball bearings from two diffe…
mean = $\boxed{16.35}$ s = $\boxed{0.07}$
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the following four sets of 7 numbers all have a mean of 9. complete par…
First blank: mean Second blank: \(0\) Third blank: larger Fourth blank: largest (For the blanks in order: The standard deviation is a measure of how widely data values are spread …
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the following four sets of 7 numbers all have a mean of 9. complete par…
\( 5.0 \)
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4. the table shows the total number y of rolls of wrapping paper sold b…
Since the problem is not fully presented (e.g., what is being asked about the table, like finding a function, slope, or something else), we can't provide a complete solution. But …
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the following four sets of 7 numbers all have a mean of 9. complete par…
\( 3.0 \)
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the following four sets of 7 numbers all have a mean of 9. complete par…
\( 0.8 \)
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the following four sets of 7 numbers all have a mean of 9. complete par…
\( 0.0 \)
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number of aquatic organisms in dunsville fishery year | 2008 | 2009 | 2…
7.5% (the option with 7.5%)
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the following four sets of 7 numbers all have a mean of 9. complete par…
low value = 4 lower quartile = 4 median = 9 upper quartile = 14 high value = 14
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the following four sets of 7 numbers all have a mean of 9. complete par…
low value = 6 lower quartile = 6 median = 9 upper quartile = 12 high value = 12
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name: unit 8: probability & statistics homework 7: measures of center &…
Mean: $32$; Median: $25.5$; Mode: None; Range: $51$
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the following four sets of 7 numbers all have a mean of 9. complete par…
low value = 8 lower quartile = 8 median = 9 upper quartile = 10 high value = 10
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the following four sets of 7 numbers all have a mean of 9. complete par…
low value = \(\boldsymbol{9}\) lower quartile = \(\boldsymbol{9}\) median = \(\boldsymbol{9}\) upper quartile = \(\boldsymbol{9}\) high value = \(\boldsymbol{9}\)
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the following four sets of 7 numbers all have a mean of 9. complete par…
D. The histogram with data values on the x - axis (0, 3, 6, 9, 12), frequency on the y - axis (0, 1, 2, 3, 4), and bars: height 3 at around 4, height 1 at around 9, height 3 at ar…
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the following four sets of 7 numbers all have a mean of 9. complete par…
B. The histogram with x - axis as data value (6, 9, 12) and y - axis as frequency, where the bar for 6 has height 3, bar for 9 has height 1, and bar for 12 has height 3.
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gerald purchased 55 paving stones to use in his garden. the graph shows…
\( y = -5x + 55 \)
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the following four sets of 7 numbers all have a mean of 9. complete par…
D. (The histogram with data value on the x - axis (ranging from 0 - 12) and frequency on the y - axis, with bars for data values 8, 9, 10 having heights 2, 3, 2 respectively)
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the figure below is divided into 100 squares of equal size. what percen…
56%
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allison has a part - time job at an ice skating rink selling hot cocoa.…
A prediction of the number of hot cocoas sold when the temperature is \(0^{\circ}F\).
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anand keeps track of the number of people inside a music hall to attend…
At 7:15, Anand should expect about 120.3 people in the music hall.
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the scatter plot and line of best fit below show the length of 11 peopl…
An expected height of 160 centimeters when the femur has a length of 42.6 centimeters.
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question 5 a. what percentage of households made between $100,000 and $…
15.3%
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if the wrong word is used below, change it. if there is no error, click…
Submit Answer (as there is no error in the word usage; "allusion" is correctly used to mean a reference to Dr. Seuss).
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what is the percent of increase from 5 to 6? write your answer using a …
20%
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what is the percent of increase from 13.1 to 26.2? write your answer us…
100%
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the table to the right gives the cost of living index (coli) for six ea…
A. It works well in the Midwest data set, but it does not work well in the East Coast data set, because there is a outlier in the East Coast data set.
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study before answering how does data encoding aid us in interpreting ch…
It helps us understand patterns in the data.
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what is the percent of increase from 50 to 73? write your answer using …
46%
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the table to the right gives the cost of living index (coli) for six ea…
35.23
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the table to the right gives the cost of living index (coli) for six ea…
52.58
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what is the percent of decrease from 10 to 3? write your answer using a…
Since there is an increase from 10 to 37, the percent increase is \( 270\% \). But if we strictly follow the "decrease" wording (which is incorrect here), there is no decrease. Ho…
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what is the percent of increase from 68 to 85? write your answer using …
25%
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what aspect of this chart demonstrates a relationship between variables…
The vertical position of each purple bar.
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study before answering based on the stacked area chart encoding, what c…
Rainfall for City A is staying constant from 2017 - 2021.
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what relationship is demonstrated by the encoding of data on this chart…
A negative relationship is shown by the downward trend in the data points and the fitted red trend line.
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which best describes a reason that consumer demand can change? ○ loss o…
A. loss of income
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what is the percent of increase from 50 to 93? write your answer using …
86%
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study before answering why is it best to pay attention to the chart dat…
It helps us make sense of the patterns and connections in the data.
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what is the percent of decrease from 8 to 2? write your answer using a …
75%
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why is it important to ensure that the same visual encodings are used c…
Consistent visual encodings help maintain clarity and interpretation accuracy.
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what is the percent of increase from 60 to 66? write your answer using …
10%
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what is the percent of decrease from 10 to 5? write your answer using a…
50%
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what is the percent of change from 40 to 38? 2% decrease 5% decrease 2%…
5% decrease (the option with "5% decrease" text)
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what is the percent of change from 44 to 33? 11% decrease 25% increase …
25% decrease (corresponding to the option "25% decrease")
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2.5.ps-8 the graph shows the amount of savings over time in eliana’s ac…
A. Eliana saves at a greater rate because her unit rate of $\boldsymbol{37}$ per week is greater than Lana's unit rate of $\boldsymbol{35}$ per week.
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the table to the right gives the cost of living index (coli) for six ea…
Low Value = 87.6 Lower Quartile = 92.2 Median = 95.2 Upper Quartile = 96.3 High Value = 228.5
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which persuasive strategy is most effective when trying to connect with…
d. Pathos ### Second Question
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the table to the right gives the cost of living index (coli) for six ea…
Low Value = 104.5 Lower Quartile = 123.2 Median = 131.85 Upper Quartile = 141.2 High Value = 314.8
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design a grade - appropriate question that students could investigate u…
D. All of the above
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the table to the right gives the cost of living index (coli) for six ea…
157.90
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which number do you expect to be greater, a combination or a permutatio…
B. There are usually more permutations because one or more permutations can be made from each combination.
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assume a class has 27 members. a. in how many ways can a president, a v…
a. The number of ways to select a president, a vice - president, and a secretary is \(\boldsymbol{17550}\). b. The number of ways to select an 11 - person committee is \(\boldsymb…
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a student is not sure when to add and when to multiply probabilities. h…
A. One multiplies probabilities when events are independent. Adding probabilities occurs when separate outcomes are a part of the desired event.
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an executive committee consists of 15 members: 7 men and 8 women. 6 mem…
\(\frac{1}{715}\)
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a box contains 8 letters, shown as reaching. what is the probability of…
(a) \(\frac{1}{4096}\) (b) \(\frac{1}{1680}\)
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let the universal set, u, be the set of students at central high, a be …
D. The probability of a student not taking chemistry
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let the universal set, u, be the set of students at central high, a be …
C. The probability of a student taking algebra or chemistry ### Part b
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if a and b are mutually exclusive, and if p(a) = 0.5 and p(b) = 0.2, wh…
\( 0.7 \)
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a box contains 7 white balls, 6 black balls, and 1 red balls. a) how ma…
s: a) \( \boldsymbol{51} \) red balls. b) \( \boldsymbol{21} \) black balls.
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suppose a drawer contains seven red socks, four brown socks, and five g…
a. \(\frac{1}{4}\) b. \(\frac{3}{4}\) c. \(0\) d. \(\frac{9}{16}\) e. \(1\)
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read the following sentence: all of the toddlers forgot the dance steps…
The option with "gushing" (the third option from the top, labeled "gushing")
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solve using the proportion formula. state the part, whole, and percent …
part = 17 (players) whole = 68 (players) percent = 25 (%) Substitute and solve: Using \(\frac{17}{\text{whole}}=\frac{25}{100}\), cross - multiply to get \(25\times\text{whole}=17…
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read the following passage: most americans want prosecutors to try opti…
D. jail time
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multiple choice 4 points ____ means that bureaucratic employees earn jo…
Professionalization
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5 multiple choice 4 points ____ means that bureaucratic employees earn …
merit
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read this excerpt from a passage. the ivory trade centers on african el…
B. Sadly, this means that a tusk cannot be removed like a tooth.
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rewrite the following paragraphs.\ \ poverty is a vital but slippery co…
The correct option (assuming the options are the labeled paragraphs) is the one stating: "To illustrate, absolute poverty or the minimum income needed to buy the bare necessities …
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consider the women’s 100-yd dash (and the subsequent 100-m dash) in the…
B. A scatterplot would show the relationship between the 100 - yd dash and the 100 - m dash.
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what is wrong with the following line graph? choose the correct answer …
B. There is no title and no label on the vertical axis. The horizontal axis does not have uniform spacing.
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coach washington kept track of the jumping records for the basketball t…
B
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classify the following questions as biased or fair. complete parts (a) …
B. The question is fair because it doesn't ask for an opinion one way or another. ### Part (b)
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fluency and skills practice | name: lesson 12 understanding the number …
- The two lines representing the runners' distance - time graphs are coincident (they overlap completely). So, every point on the line is an intersection point (infinitely many in…
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read this outline for an essay. 1. should college students work during …
To inform teens about both sides of the student work issue.
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explain whether a circle graph would change if the amount of data in ea…
D. Since each category doubled its count, the count labels on the graph will change but the size and percentage for each section will not.
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question 1 2 pts which of the following best describes the purpose of a…
B. Compare the means of three or more groups
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the table shows the rainfall for three days in april. the first row sho…
The day with the least amount of rainfall per hour is April 13. The day with the greatest amount of rainfall per hour is April 11.
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the following pictograph shows the approximate attendance at four big s…
- People attended boy’s soccer: 1250 - People attended girl’s soccer: 3000 - People attended boy’s basketball: 3750 - People attended girl’s basketball: 1250
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use quadratic regression to find the equation for the parabola going th…
The coefficient of \( x \) is \(-1\), so the middle box is \(-1\) (and the constant term is \(-20\), but the question asks for the coefficient of \( x \), so the answer for the [?…
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use quadratic regression to find the equation for the parabola going th…
\( y = 3x^2 - x - 20 \)
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a class of eighth graders undertook an ambitious project to compile the…
Black: 37, White: 49, Navy Blue: 52, Gray: 68, Maroon: 80, Other: 21 (Fill these values in the respective boxes as per the question's blanks)
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select the word or phrase that is redundant and can be removed without …
in the evening
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select the word or phrase that is redundant and can be removed without …
descriptive (or detailed, but in the context, "descriptive" is the redundant one here)
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select the word or phrase that is redundant and can be removed without …
an aquatic reptile of the Triassic period
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select the word or phrase that is redundant and can be removed without …
in addition
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select the word or phrase that is redundant and can be removed without …
on their faces
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select the word or phrase that is redundant and can be removed without …
celebratory
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select the word or phrase that is redundant and can be removed without …
still
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select the word or phrase that is redundant and can be removed without …
until later
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select the word or phrase that is redundant and can be removed without …
honest (or truthful)
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select the word or phrase that is redundant and can be removed without …
and set free
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select the word or phrase that is redundant and can be removed without …
around
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select the word or phrase that is redundant and can be removed without …
approximately (or about, but in the given sentence, the redundant one is "approximately" or "about". Since the question is to select the word or phrase, the answer is "approximate…
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select the word or phrase that is redundant and can be removed without …
and found
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tossing coins find the mean, variance, and standard deviation for the n…
Mean: 10 Variance: 5 Standard deviation: 2.236
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multiple-choice exam a student takes a 14-question, multiple-choice exa…
0.089