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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sam bought 2 lottery tickets at school to win the big prize, a surf boa…
$0.25\%$
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the jelly bean jar has 4 flavors: 24 lemon, 26 lime, 30 orange, and 20 …
\(80\%\)
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find the standard deviation, \\( \\sigma \\), of the data. 78, 45, 73, …
$10.4$
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find the variance of the data. 78, 45, 73, 66, 61, 67 (overline { x } =…
\(109\)
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find the mean, $overline{x}$, of the data. 78, 45, 73, 66, 61, 67 $over…
\(65\)
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find the standard deviation, (sigma), of the data. 97, 122, 143, 155, 1…
$20.0$
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find the variance of the data. 97, 122, 143, 155, 138 (overline{x}=131)…
\(401.2\)
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find the mean, \\( \\overline { x } \\), of the data. 97, 122, 143, 155…
\(131\)
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find the standard deviation, σ, of the data. 87, 94, 103, 84, 112, 90 (…
$9.7$
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find the variance of the data. 87, 94, 103, 84, 112, 90 \\( \\overline …
\(94\)
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find the mean, \\( \\overline { x } \\), of the data. 87, 94, 103, 84, …
\(95\)
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find the standard deviation, (sigma), of the data. 156, 90, 146, 132, 1…
\(20.9\)
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emily has a basket of cookies. there are 20 chocolate chip, 15 sugar an…
\(25\%\)
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emily has a basket of cookies. there are 30 chocolate chip, 30 sugar, a…
\(80\%\)
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probability model uniform a bag contains 23 black stones, 23 white ston…
\(8\%\)
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part #5: describe in detail the line of best fit and its meaning explai…
- **Left Graph**: A line of best fit with a negative slope representing the average decrease in the number of typos as practice time increases. It can be used for prediction of ty…
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find the variance of the data. 156, 90, 146, 132, 122, 134 \\( \\overli…
\(436\)
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terri tosses an unfair weighted coin 200 times. the results are 70 head…
\(35\%\)
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find the mean, \\( \\overline { x } \\), of the data. 156, 90, 146, 132…
\(130\)
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question 24 answer to two decimal places find the mode: find the range:…
19, 26, 6.97
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part #4: determine how many guests it will take for the two venues to b…
\(120\)
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find the standard deviation, \\( \\sigma \\), of the data. 147, 141, 12…
$173.0$
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answer to two decimal places find the mode: find the range: find the st…
18, 26, 9.49
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a jar contains white, red and blue marbles. the probability of pulling …
\(0.4\)
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find the variance of the data. 12, 53, 141, 219, 500 \\( \\overline { x…
$29934$
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find the mean, (overline{x}), of the data. 12, 53, 141, 219, 500 (overl…
$185$
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part #3: read each situation carefully and determine the linear equatio…
- First situation: - SLOPE \(=25.5\) - Y - Int \(=0\) - Equation: \(y = 25.5x\), where \(x\) is the number of lawns mowed and \(y\) is the money made. The slope \(25.5\) means tha…
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you are planning a class pizza party. the pizza delivery fee is $25. ea…
The equation is $12n + 25 = 205$. Solving for $n$, we get $n = 15$. This means that 15 pizzas were ordered for the class pizza party.
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sheila throws a six sided die. what is the probability that she will ge…
\(33\%\)
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maggie goes into a dark room and randomly grabs a hair tie from a drawe…
20%
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joeys school raffle has 500 tickets and joey bought 10. allies school r…
Both the Same
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algebra 1 unit 3 section c checkpoint 1. during the autumn, a canadian …
a. The relationship is weak and negative. b. No, the relationship is not causal. Flu cases are influenced by health - related factors (e.g., virus transmission, immunity) and sand…
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great! answer one more correctly to continue. rearrange the sentence be…
Cyberbullying and public shaming are encouraged by social media platforms like Facebook.
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name: genesis m unit 1d: solving equations (day 1 - practice attempting…
- The equation is $420 + 14n = 1050$. - The value of $n$ is $45$. - This means that there are 45 students going on the field - trip, as when we calculate using the cost structure …
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part #2: write the equation of the line and explain its meaning. find t…
- Travel Distance: - SLOPE=\(-60\) - Y - Int=\(360\) - Equation: \(y=-60x + 360\), meaning distance decreases 60 miles per hour from an initial 360 miles - ANSWER=\(60\) miles - M…
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2. this table shows the cost of candy per pound for two stores. (2 poin…
Store B has the higher unit rate. Store B's line would have a steeper slope.
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in a study, the sample is chosen by asking our 40 closest friends what …
C. Convenience
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does this describe an observational study or an experiment? a group of …
Experiment
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in a study, the data you collect is letter grade (a,b,c,d,f). this data…
Qualitative (Categorical)
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f1 - feuille de traduction - être et les adjectifs #2 translate the fol…
1. She is very kind and sociable! 2. You are not boring. 3. They are intelligent, but they are lazy. 4. I am not tired. 5. Are you sad or are you happy? 6. Pierre and Claude are s…
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translate the following sentences into english: 1. elle est très aimabl…
1. She is very kind and sociable! 2. You are not boring. 3. They are intelligent, but they are lazy. 4. I am not tired. 5. Are you sad or are you happy? 6. Pierre and Claude are s…
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name hour quiz october 28, 2025: linear equations, line of best fit & t…
- For the car: - SLOPE \(=-3500\) - Y - Int \(=75700\) - Equation: \(y=-3500x + 75700\), where \(x\) is the number of years since buying the car and \(y\) is the value of the car.…
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the city of raleigh has 7900 registered voters. there are two candidate…
0.578 4566.2
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rhianna entered the amount she charged on her credit card each month in…
between April and July
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the city of raleigh has 9200 registered voters. there are two candidate…
The 250 voters surveyed
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jon kept track of the number of games his soccer team won each year. ac…
between 2021 and 2023
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the financial aid office at stafford university produced an internal re…
between 2019 and 2020
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the city of raleigh has 8100 registered voters. there are two candidate…
All registered voters with telephones in Raleigh
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winston, a doctors office receptionist, tracked the average waiting tim…
Between March and June
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rearrange the sentence below to remove any wordy sections. do not chang…
Similar insecurities Jafar and Aladdin share.
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read the following excerpt from robinson crusoe. when these thoughts we…
A. Considering the nature
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11.4 statistics score: 0/40 answered: 0/24 question 1 a political scien…
Sample size: 32 Population size: 112
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activity: remember equation model: total cost you are planning a trip t…
- The equation for the total cost is \(17n + 500=1452\). - The value of \(n\) is \(56\). - The answer \(n = 56\) means that there are 56 students going on the trip to the zoo.
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the heights of the students in your class are normally distributed with…
\(61.40\)
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which measure of variability is not resistant to extreme values? interq…
range
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question status: 1? 2? 3? 12:38 pm suppose the random variable, x, is d…
\(5.67\)
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read the following excerpt from robinson crusoe. when these thoughts we…
D. Considering the nature
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suppose z has a standard normal distribution with a mean of 0 and stand…
\(-0.61\)
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find the area under the standard normal curve that lies either to the l…
\(0.0500\)
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3. the data set is the number of minutes a sample of 25 people exercise…
| Class | Midpoint | Boundaries | Relative Frequency | Cumulative Frequency | |---|---|---|---|---| | $101 - 112$ | $106.5$ | $100.5 - 112.5$ | $0.12$ | $3$ | | $113 - 124$ | $118…
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workspace: a study compared the average monthly amount spent on swimsui…
The statement is not accurate. Correlation does not equal causation. A third variable (like temperature) likely influences both spending on swimsuits and air - conditioning.
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question 11 (2 points) listen which of the following was not true of a …
It had no impact on how a person, in a public setting, related to peoples of other castes.
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question 24 (bonus) (1 point) use the standard normal distribution tabl…
\(2.28\) ### Question 25
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question 22 (1 point) give an exact answer based on the empirical rule …
Question 22: \(2.5\) Question 23: \(15.87\)
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increasing test scores (option 4 of 4) a school claims that their new t…
No, it does not prove the program works.
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the variable x is normally distributed with μ = 60.00 and σ = 10.00. de…
\(-0.70\)
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question 20 (bonus) (1 point) an automobile manufacturer introduces a n…
Question 20: \(25.05\) Question 21: \(25.90\)
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question 18 (bonus) (1 point) the act scores from students in a state w…
Question 18: \(78.52\) Question 19: \(91.77\)
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calculating the interquartile range of a data set december temperatures…
\(7\)
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our organization is proud to announce a right - sizing initiative that …
- First Question: Euphemisms - Second Question: They blunt harsh realities and may mislead about consequences. - Third Question: - "opportunity to explore new horizons" → being un…
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question 16 (bonus) (1 point) use the standard normal distribution tabl…
71.57 74.86
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question 14 (1 point) a normal distribution has a mean of -62 and a sta…
Question 14: \(-0.20\) Question 15: \(1.32\)
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12. find the equation of the line containing the first and the last dat…
12. \(y=\frac{9}{4}x+\frac{1}{2}\) 13. \(y = 13.04x+16.43\)
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12. find the equation of the line containing the first and the last dat…
\(y=\frac{9}{4}x+\frac{1}{2}\)
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is there enough evidence? (option 1 of 4) two friends, tom and jerry, w…
Agree with Jerry. A sample of \(n = 10\) is too small. A sample size of at least \(n = 30\) (a common starting point for more reliable statistical inferences) would be needed. If,…
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the variable x is normally distributed. the population mean is 15.2, an…
\(0.1587\)
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calculating the interquartile range of a data set what is the interquar…
\(8\)
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here are justins receiving yards in 13 games at the end of the season: …
\(96\)
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here are 13 of alis walk times to the nearest restroom (in seconds): 26…
\(89\)
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here are the last 13 ticket totals officer clark has handed out: 123, 6…
\(66\)
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question 8 (1 point) sampling methods. when collecting data, what three…
B. Simple Random Sample, D. Cluster Sample, E. Stratified Sample
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calculating the standard deviation of a data set december temperatures …
The sample mean is approximately $38.11$. The sample standard deviation is approximately $3.66$.
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here are justins receiving yards in 13 games at the end of the season: …
\(134\)
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question 7 (2 points) 5 - number summary select all that apply. which o…
a. The lower quartile separates the lower 25% of data values. d. The whiskers extend from the quartiles to the most extreme values (minimum and maximum). e. The length of the box …
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question 6 (1 point) what does variability refer to? the difference bet…
B. How much the values within a data set differ from one another.
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matching. match the measure of center with its description. column a co…
1. Mean - a, Median - c, Mode - b 2. Range - c, Standard Deviation - b, Interquartile Range (IQR) - a
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statistics is the science of collecting, analyzing, and making inferenc…
Question 2: True Question 3: 1. a, 2. b
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objectives: i will be able to.. • calculate the 3 measures of center • …
B. I will be able to calculate measures of center and spread, and discuss bias
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a pet store has 7 cats. here are their weights (in pounds). 15, 16, 9, …
$10.6$
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example 3 what do the highlighted cells best represent? o a the number …
B. The number of people who are "2nd Year Students".
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example 3 what is the following best rerepresents the highlighted cells…
A. It is the people who are "1st year students" OR work "1 job".
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describe the type of association (positive, negative, or no) each scatt…
10. Positive 11. No
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example 3 suppose a researcher collected student data on ccds campus an…
B. Find the cell that is intersected by the "1st year student" row and "1 job" column.
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example 3 suppose a researcher collected student data on ccds campus an…
B. The answer is \( \frac{19}{30} \), because you must find the total of "1 job" and then divide by the total number of people sampled.
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example 1 suppose you have a cookie jar containing 5 chocolate chip coo…
C. After taking 1 chocolate chip cookie out of the jar, there are only 4 left out of now 19 total cookies.
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example 1 suppose you have a cookie jar containing 5 chocolate chip coo…
D. There are a total of 20 cookies in the jar.
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question 4 (1 point) what is the correct formula for find the probabili…
B. \( P(A \text{ and } B)=P(A)\cdot P(B) \)
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1. when hanna goes to the mall, she always buys the same lunch and buys…
positive
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question 3 (2 points) matching use the following image from the notes t…
1. b 2. c 3. d 4. a
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true or false. probability is the likelihood of an event happening. tru…
True