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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question 6 of 9, step 4 of 5 21-b book street books sells 1080 books ea…
119
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question 6 of 9, step 3 of 5 21-9 book street books sells 1080 books ea…
216
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2. leslie will use more than \\(\frac{1}{2}\\) cup but than 1 whole cup…
A possible fraction is $\frac{3}{4}$ (or $\frac{2}{3}$, $\frac{5}{8}$, etc.). Explanation: For $\frac{3}{4}$, $\frac{1}{2}=\frac{2}{4}$ and $1 = \frac{4}{4}$, and $\frac{2}{4}<\fr…
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21 - book street books sells 1080 books each month. the circle graph di…
432
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question 5 of 9, step 1 of 1 pizza pie n go sells about 1700 one - topp…
408
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2. leslie will use more than \\(\\frac{1}{2}\\) cup but less than 1 who…
A possible fraction is \( \frac{2}{3}\) (or other fractions like \( \frac{3}{4},\frac{5}{8}\) etc.). For example, \( \frac{2}{3}\) is more than \( \frac{1}{2}\) (since \( \frac{2}…
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step 2 of 3 : how many people weigh in the range from 160 to 200 inclus…
21
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question 6 of 8, step 5 of 5 step 5 of 5: calculate the percentage of p…
35%
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question 6 of 8, step 3 of 5 the following histogram shows the results …
38
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question 6 of 8, step 2 of 5 the following histogram shows the results …
7
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the following data represent the test scores for 18 students in a class…
| Stem | Leaves | |------|--------| | 5 | 1 4 5 6 8 8 8 | | 6 | 0 1 3 3 4 5 8 | | 7 | 1 | | 8 | 1 2 | The missing stem values (from top to bottom in the blank stem boxes) are: 5, …
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(1 point) some students conducted a survey on some people’s weekly inco…
For mean (correct calculation): $\$24100$ (if we calculate correctly, but the problem's given mean might have an error). For median: $\$1750$. And the better representation is med…
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step 2 of 2: determine the relative frequency for the second class as a…
$\frac{11}{54}$
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step 1 of 2: determine the relative frequency for the third class as a …
$\frac{5}{18}$
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question 5 of 8, step 1 of 1 6/12 correct consider the following freque…
7
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step 2 of 2: determine the cumulative frequency of the fourth class. mi…
85
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a business magazine was conducting a study into the amount of travel re…
$45$
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step 2 of 2: determine the relative frequency of the third class. round…
0.304
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step 1 of 2: determine the relative frequency of the second class. expr…
0.215
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determine the class width of each class. hourly wage at first job class…
0.9
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step 2 of 2: determine the cumulative frequency for the third class. ho…
25
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question 1 of 8, step 1 of 2 consider the following frequency table rep…
38
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question 6 of 9, step 1 of 3 the following bar graph shows the number o…
Wyoming
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(1 point) a boxplot for a set of 52 scores is given below. how many sco…
13
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question 5 of 9, step 2 of 2 last month, walmart surveyed 2000 customer…
260
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3) shortcut method - ( x = a + \frac{sum d}{n} ) - ( d = x - a ) - ( a …
The formula \( \bar{x}=A + \frac{\sum d}{N} \) (where \( d = x - A \) and \( A \) is the assumed mean) is a shortcut method (usually for calculating the arithmetic mean) in statis…
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three brothers are saving for a special trip. the ratio of oscar’s savi…
### Question 3: Oscar saved $\$32$, Nick saved $\$12$, Liam saved $\$20$. ### Question 4: C. The table shows equivalent ratios that relate each brother's savings. Add the amounts …
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chapter 2 homework: problem 24 previous problem problem list next probl…
B
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(1 point) consider the following data set. find the mean and standard d…
Mean: \(\approx62.86\) Standard deviation: \(\approx20.75\) L or S: L
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(1 point) a yoga teacher collected data on the ages of the people in he…
C. At least half of the people in the class are 36 years old or younger.
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(1 point) the following data can be copy - pasted into geogebra or mini…
To solve for the outliers, we first need to organize the data and then use the interquartile range (IQR) method. ### Step 1: Organize the Data First, let's list the data in order:…
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part (c) based on the boxplot, we would expect the mean to be ____ the …
B. approximately the same ### Part (d)
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(1 point) which of the following are true? a. the median value for d1 i…
F. At least a quarter of the data values in D2 are less than all of the data values in D3.
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question 1 (1 point) listen when nagel says that ethical claims are obj…
1. There are at least some ethical values that apply to everyone, whether a person believes in those values or not. 2. Religion cannot be the source of morality because people who…
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(1 point) the following are boxplots of the numbers of hits at a certai…
A. The IQR will stay the same.
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(1 point) mike took 4 courses last semester: spanish, history, biology,…
The z - scores are: Spanish: \(-0.75\), History: \(0.50\), Biology: \(1.25\), Calculus: \(-0.25\) The exam on which Mike had the highest relative score is Biology.
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for minitab, look at instructional videos on \getting data into minitab…
To determine the five - number summary, we first need to sort the data set. Let's assume the data set (from the context, we can infer the data points, and we'll sort them): ### St…
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two boys and three girls are auditioning to play the piano for a school…
# Explanation: ## Step1: Find total number of students There are 2 boys and 3 girls, so total students $n = 2 + 3 = 5$. ## Step2: Probability pianist is a boy Number of boys is 2,…
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a standard deck of 52 playing cards contains four of each numbered card…
$\boldsymbol{\frac{({}_4C_1)({}_4C_1)}{{}_{52}C_2}}$ (the last option)
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two unique letters are chosen at random from the alphabet. what is the …
0.0385
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a landscaper is selecting two trees to plant. he has five to choose fro…
60%
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a lock is opened using a sequence of three numbers. the numbers range f…
12% (Option: 12%)
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a website randomly creates an initial password for people when they fir…
s: - Probability of no vowels: \(\approx0.3094\) - Probability first letter is \(m\): \(0.03846\) (corresponding to the option with this value)
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a website randomly creates an initial password for people when they fir…
0.30935
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a bicycle lock has a four - digit code. the possible digits, 0 through …
0.6
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the word geometry has eight letters. three letters are chosen at random…
0.536
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there are 10 boys and 12 girls in the tennis club. the coach wants to s…
B. There is approximately a 52 percent likelihood that one boy and one girl will be chosen to practice first. C. There is approximately a 19 percent likelihood that two boys will …
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a bag contains eight yellow marbles, nine green marbles, three purple m…
\( P(Y \text{ and } R) = \frac{(_{8}C_{1})(_{5}C_{1})}{_{25}C_{2}} \) (the second option)
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match the terms with the definitions. 6.1) ____ indiscretion 6.2) ____ …
6.1) B. an act that is performed not using good judgment 6.2) C. personal; not public 6.3) D. that which has to do with keeping something safe or free of danger 6.4) A. having to …
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1.014) remuneration involves direct pay for work, but it also involves …
To answer these fill - in - the - blank questions, we analyze each one based on workplace and employment - related knowledge: ### Question 1.014 Remuneration (compensation for wor…
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the figure below is divided into 100 squares of equal size. what percen…
50%
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the figure below is divided into 100 squares of equal size. what percen…
53%
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(b) how many students are interested in yoga or spinning, but not pilat…
12
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the manager of a campus gym is planning the schedule of fitness classes…
The Venn diagram will have three overlapping circles labeled *Yoga*, *Pilates*, and *Spinning* with the following values: - Only Yoga: 2 - Only Pilates: 5 - Only Spinning: 4 - Yog…
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in a class of 25 students, 13 were math majors, 8 were computer science…
- Area outside both circles (Class): $\boldsymbol{9}$ - Math circle only: $\boldsymbol{8}$ - Overlap of Math and Computer Science: $\boldsymbol{5}$ - Computer Science circle only:…
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students marks (x) d = x - a (a=50) a 85 +35 b 60 +10 c 50 (a) 0 d 75 +…
The mean of the marks is \(\boxed{60}\).
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quiz 2 (chapters 1 & 2) question 14 of 15 (1 point) | question attempt:…
11
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the manager of a campus gym is planning the schedule of fitness classes…
The Venn diagram will have three overlapping circles labeled **Yoga**, **Pilates**, and **Spinning** within a universal set (total 64 students) with the following values: - Only Y…
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(b) how many of the students had been arrested for drug possession? the…
22
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a court record search of 265 incoming first - year students at a state …
The Venn diagram values are: - Outside both circles: 220 - Underage drinking only (red circle non-overlap): 23 - Overlap of both circles: 7 - Drug possession only (blue circle non…
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b. you have $75 to spend. how many competitions can you attend? you can…
2
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estimate 13.434 + 7.54 by first rounding each number to the nearest ten…
20.9
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b. you have $75 to spend. how many competitions can you attend? you can…
15
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5. a local little league has a total of 60 players, 80% of whom are rig…
48
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6. theo’s mom bought an eight - pack of juice boxes at the store for $4…
The unit rate is \$0.5 per juice box. ### Question 7
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gorans earnings vary directly with the number of hours he works. suppos…
117
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alonzo is draining an aquarium. the graph shows the amount of water (in…
(a) 600 (b) - Correct statement: As time increases, the amount of water in the aquarium decreases. - Rate: 120
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write each rate as a unit rate. examples 1 and 2 1. 72 ounces in 6 stea…
Evans drove the fastest because his unit rate (laps per minute) is the highest among the three drivers.
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if \\(\\sin(\\theta) > 0\\), then \\(\\theta\\) is in which quadrant(s)…
1-2 ### Question 11 (about \(\cos(\theta) > 0\))
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how would taking more samples improve an estimate of the population mea…
Taking more samples improves the estimate of the population mean because it reduces the standard error of the mean (given by $\frac{\sigma}{\sqrt{n}}$, where $n$ is the sample siz…
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60. writing in math a truck driver estimates that it will take him 12 h…
Yes, he is on schedule. The planned speed is approximately \( \frac{1160}{12}\approx96.67 \) km/h and the actual speed is \( \frac{484}{5} = 96.8 \) km/h. Since the actual speed (…
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a store is giving every customer who enters the store a scratch - off c…
a. 15% discount: $\frac{1}{2}$; 25% discount: $\frac{2}{5}$; 30% discount: $\frac{1}{10}$ b. Most customers receive the 15% discount because 200 customers receive that discount.
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a store is giving every customer who enters the store a scratch - off c…
15% discount: $\frac{1}{2}$ 25% discount: $\frac{3}{10}$ 30% discount: $\frac{1}{5}$
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b. the principal decides to take 20 different samples of 20 test scores…
79.325
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paulina uses the following spinner. a. what is the sample space? b. wha…
a. $\{A, Y, 3, 5\}$ b. $\frac{3}{8}$
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a bag contains 13 marbles: 5 green, 3 brown, and 5 purple. ethan draws …
a. $0$ b. $\frac{8}{13}$ c. $1$
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suppose amy has a bag of colored wristbands and she chooses one without…
a. $\frac{17}{20}$ b. likely
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how can you increase the accuracy of an estimate of the population mean…
To increase the accuracy of an estimate of the population mean, we can: 1. Increase the sample size (to reduce sampling error, as seen from the formula for standard error of the m…
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suppose amy has a bag of colored wristbands and she chooses one without…
\(\frac{17}{20}\)
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c. do you think the mean of the sample means is a better estimate of th…
Yes, the mean of the sample means is a better estimate. By the Central Limit Theorem, the mean of sample means (from multiple samples) converges to the population mean. It reduces…
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b. the teacher decides to take several samples of 30 crayons and calcul…
\(2.12\)
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you spin the spinner once. what is p(2 or greater than 5)? write your a…
42.86%
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you spin the spinner once. what is p(odd or less than 5)? write your an…
$\frac{3}{4}$
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a 12 - sided solid has equal - sized faces numbered 1 to 12. a. find p(…
a. 41.7% b. 16.7% c. Yes, the solid is fair.
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a 12 - sided solid has equal - sized faces numbered 1 to 12. a. find p(…
a. 41.7% b. 16.7% c. Yes, the solid is fair.
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data mining is a means of _______ data that can help organizations find…
C. analyzing
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a spinner has 8 equal - sized sections. to win the game, the pointer mu…
$P(\text{blue})=\frac{2}{8}=\frac{1}{4}$
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a spinner has 10 equal - sized sections. to win the game, the pointer m…
$\frac{3}{10}$
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challenge suppose you have a bag with 20 letter tiles in it and 9 of th…
- P(C) as a fraction: $\frac{17}{50}$ - P(C) as a percent: $34\%$ - More likely bag: The second bag with 500 tiles
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this year, 17,884 people attended a basketball teams first game, and 17…
\(4.1\)
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a bicycle lock requires a two - digit code of numbers 1 through 9, and …
\(P(\text{both even})=\frac{(_{4}P_{1})(_{3}P_{1})}{_{9}P_{2}}\) (the first option)
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mr. bauer deposits $600 in an account that earns simple interest at an …
The first box (the coefficient of the parentheses) is \( 600 \), the second box (the interest rate in decimal) is \( 0.02 \), and the third box (the time in years) is \( 3 \). So …
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multiple select question select all that apply which questions should b…
A. Are the statistics representative? B. Are statistical measures used correctly? C. Are the statistics from a reliable source? D. Are the statistics from a large enough sample?
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multiple select question select all that apply when using a hypothetica…
B. statistics D. testimony
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the depth of the water, d, in a swimming pool increases and decreases b…
For " \( d \) increased by 3%": - \( 0.97d \): Unchecked - \( 1.03d \): Checked - \( d - 0.03 \): Unchecked - \( d + 0.03d \): Checked - \( (1 - 0.03)d \): Unchecked For " \( d \)…
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determine if the outcome of the event described would be found using a …
(Grouped): - Permutation: placing items in a line, placing first or second in a race, choosing 3 - digit lock combinations - Combination: choosing cards from a deck of cards, choo…
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the two - way table shows the estimated number of students who will enr…
0.4 (corresponding to the option "0.4")
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a) five random students in each homeroom * 1 point 3. a high school is …
a) Unbias b) Bias c) Bias
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find ( p(y|b) ) from the information in the table. to the nearest tenth…
0.4
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mr. carandang sold a total of 1,790 prints of one of his drawings. out …
517 (corresponding to the option "517")