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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multiplication tenths (round to tenths) hundredths (round to hundredths…
--- ### Multiplication | Tenths (rounded to tenths) | Hundredths (rounded to hundredths) | Thousandths (rounded to thousandths) | |-----------------------------|------------------…
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use the model to answer the question. what is $\frac{2}{5} \times \frac…
C. \(\frac{2}{20}\)
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the model shows the product of \\(\frac{2}{5}\\) and \\(\frac{4}{7}\\).…
B. \(\frac{8}{35}\)
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in this sentence, what does the word \fruit\ mean? a judge b tree c res…
C. result
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rob is investigating the effects of font size on the number of words th…
# Explanation: ## Step1: Calculate the mean of x (font size) First, find the sum of all font sizes: \(14 + 12 + 16 + 10 + 12 + 14 + 16 + 18 + 24 + 22\) \(= (14+14)+(12+12)+(16+16)…
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darius is studying the relationship between mathematics and art. he ask…
C. \(y = 1.518x + 0.995\) (assuming the options are labeled as A, B, C, D with C being \(y = 1.518x + 0.995\))
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which of these key features are correct? select all that apply. | x | f…
- The function is increasing from $-2 \leq x \leq 0$. - There is an x-intercept at $(2,0)$. - There is a y-intercept at $(0,8)$.
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payton collected data to show the relationship between the number of ho…
-4.5
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which table shows a negative correlation? (the tables are presented wit…
The table with \( x \) values 2, 5, 6, 7, 10, 12 and \( y \) values 4, 2, -4, -3, -11, -12 (the fourth table) shows a negative correlation.
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the relationship between degrees celsius and degrees fahrenheit is give…
$30$ °C --- ### Second Problem:
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if a person is climbing the stairs to get to the top floor, and they ha…
10 flights of stairs
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question 1 taka reads the following equation aloud: $f(x) = 3x$. fill i…
Question 1: of Question 2: $(-14,-26),(13,-15),(22,-26),(-16,32)$
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the table shows the ages and weights of babies at a hospital. newborn c…
positive
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part 1 out of 2 how many students did she survey? drag and drop the cor…
s: - Number of students surveyed: 79 - Type of sample: biased
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teddy is preparing to sell some wooden blocks at a garage sale. before …
20 (corresponding to the option: 20)
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dallas wants to know what elective subjects the students at his school …
It is a biased sample because the sample only includes students from band class, which is not representative of all students in the school (different groups of students may have d…
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how can you select a sample so that the information gained represents t…
To select a sample that represents the entire population, you can use a **random sample** (e.g., simple random sampling, stratified sampling, cluster sampling, or systematic sampl…
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two methods are used to collect data to estimate the average shoe size …
The mean shoe size for Method 1 is \(8.75\). The mean shoe size for Method 2 is \(12.08\).
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a bearded dragon eats a number of insects each day. use the graph of th…
# Explanation: ## Step1: Find max insects for 1 dragon From the step - function graph, the maximum number of insects that 1 bearded dragon can eat is determined by the right - mos…
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7. the top and bottom were torn off the graph. a maximum occurred at 3 …
The next two times the height is 4 are 5.0905 seconds and 9.9095 seconds.
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12 week 2 ela review name: per: activity 1 a clause is a group of words…
## Activity 1 1. (p) 2. (c) 3. (c) 4. (p) ## Activity 2 1. I completed all of my homework, although I forgot to turn it in. 2. We should host a fundraiser at school; furthermore, …
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4. which measurement is the largest? 0.8 ounces 600 pounds 3200 ounces …
1. $49$ miles $<$ $300,720$ feet 2. $65$ miles $>$ $343,100$ feet 3. $250,060$ feet $>$ $37$ miles 4. $5,280$ feet $=$ $1$ mile 5. D. 0.5 tons
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3. compare each set of measurements using the symbols <, >, or =. choic…
84,480 feet $\boldsymbol{=}$ 16 miles 65 miles $\boldsymbol{>}$ 343,100 feet 163,679 feet $\boldsymbol{<}$ 31 miles 250,060 feet $\boldsymbol{>}$ 37 miles 49 miles $\boldsymbol{<}…
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11-12 week 1 ela review per: name: activity 1 a phrase is a small group…
## ACTIVITY 1 1. V; Underline: were spoken 2. S; Underline: the golden sun 3. S; Underline: the other side of town 4. V; Underline: is writing 5. S; Underline: my next door neighb…
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each student in a school was asked, \what is your favorite color?\ the …
(a) Red (b) 50%
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read the passage from \by the waters of babylon.\ i went north—i did no…
"I had long gone past what was forbidden, and I entered the likeliest towers, looking for the food of the gods."
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16. write the decimal that is equivalent to \\(\frac{4}{5}\\). 17. roch…
\(0.8\) ### Question 17
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carry out the following calculation and report the answer using the pro…
48.15 (corresponding to the option "48.15")
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when 2.3390 × 10⁸ is correctly rounded to three significant figures, th…
\(2.34\times10^{8}\) (the option corresponding to this is the one labeled "2.34 × 10⁸")
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when $1.250 \\times 10^{-2}$ is correctly converted to its standard for…
0.01250
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the table below shows the educational attainment of a countrys populati…
$\frac{40}{159}$
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the table shows the number, expressed in millions, of citizens who move…
\(0.01\)
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the table shows the number, expressed in millions, of citizens who move…
\(0.18\)
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the table shows the distribution, by age and gender, of the 31.7 millio…
0.15
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the table shows the distribution, by age and gender, of the 29.7 millio…
\(0.47\)
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a single die is rolled twice. the 36 equally - likely outcomes are show…
\(0\)
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a single die is rolled twice. the 36 equally - likely outcomes are show…
\(\frac{1}{18}\)
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a fair coin is tossed two times in succession. the set of equally likel…
$\frac{1}{2}$
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you are dealt one card from a standard 52 - card deck. find the probabi…
\(\frac{2}{13}\)
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you are dealt one card from a standard 52 - card deck. find the probabi…
\(\frac{1}{2}\)
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you are dealt one card from a standard 52 - card deck. find the probabi…
\(\frac{1}{13}\)
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a 12 - sided die is rolled. the set of equally likely outcomes is {1,2,…
\(0\)
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a 12 - sided die is rolled. the set of equally likely outcomes is {1,2,…
\( 1 \)
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a 12 - sided die is rolled. the set of equally likely outcomes is {1,2,…
\(\frac{1}{6}\)
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a 12 - sided die is rolled. the set of equally likely outcomes is {1,2,…
\(\frac{5}{6}\)
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a 10 - sided die is rolled. find the probability of rolling an even num…
\(\frac{1}{2}\)
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without actually solving the problem, choose the correct solution by de…
A. 70 dimes; 20 quarters
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without actually solving the problem, choose the correct solution by de…
A. computer disk = $8; notebook = $3
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find the product and write it in lowest terms.\\(\frac{18}{5} cdot \fra…
\(\frac{21}{10}\)
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multiply and simplify. \\frac{1}{18} \\cdot \\frac{6}{17} \\frac{1}{18}…
\(\frac{1}{51}\)
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12. $log_{3} 9 = log_{2} 2$ d. $log_{3} 36$ in exercises 13–20, expand …
13. $2\log_6 2 + \log_6 x$ 14. $\log_8 3 + \log_8 x$ 15. $1 + 5\log x$ 16. $\ln 3 + 4\ln x$ 17. $\ln x - \ln 3 - \ln y$ 18. $\ln 6 + 2\ln x - \ln y$ 19. $\log_7 5 + \frac{1}{2}\lo…
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the graph above is a continuous line or curve. its domain can best be d…
an exponential function
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question the first three terms of a sequence are given. write your answ…
39
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story jaylin buys 3 bags of bagels. the store gives her 5 bagels for fr…
- In the story: The number 9 is the number of bagels in each of the 3 bags Jaylin bought. 3 bags of 9 bagels plus 5 free bagels gives $3(9)+5=32$ total bagels, which matches the s…
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lets play more umber line disc golf\! this time, the number line is div…
The sum \(\frac{8}{12}+\frac{10}{12}\) is \(\frac{18}{12}\) (or simplified to \(\frac{3}{2}\) or \(1\frac{1}{2}\)), and \(\frac{3}{2}>1\) (so Mei's disc lands at \(\frac{18}{12}\)…
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a pattern for multiplying decimals rewrite a decimal problem as fractio…
1. 2 decimal places, 0 decimal places, 2 decimal places; Product: $9.75$ 2. 1 decimal place, 0 decimal places, 1 decimal place; Product: $25.6$ 3. 1 decimal place, 2 decimal place…
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use <, >, or = to compare the following decimals. (a) 7.29 \\square 7.2…
7.29 > 7.24 ### Part (b)
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10. 28.4 + 73.2 + 221.88 = 11. 98.34 + 17.626 = 12. 191.34 + 58.177 + 2…
d. 10. 323.48 11. 115.966 12. 251.547
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question 2 (1 point) round to the nearest thousandth. 6. 0.1245 7. 7.21…
A. 6. 0.125 7. 7.220 8. 456.255
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5.1.2 exam: wrap up based on the context of the sentence, what is most …
B. Apprehensive
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4th hour (7th grade math) topic 3 assessment in game 1, emerson struck …
$\frac{112}{350} = \frac{x}{100}$
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jocelyn estimates that a piece of wood measures 5.5 cm. if it actually …
2.14%
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1. what was jacob riis’s role in exposing the conditions of new york ci…
The child dying from measles symbolized the dire health consequences of unsanitary, overcrowded tenement living conditions, representing the vulnerability of the poor (especially …
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question 2 (1 point) which number is higher? 9. 2,109.8 or 2,107.9 10. …
a. 9. 2,109.8 10. 74,846.50
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question 1 (1 point) which number is higher? 9. 2,109.8 or 2,107.9 10. …
A. 9. 2,109.8 10. 74,846.50
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question tyshawn left his house at time zero and drove to the store, wh…
Plot the following connected segments on the graph: 1. From $(0, 0)$ to $(2, 16)$ 2. From $(2, 16)$ to $(4, 16)$ 3. From $(4, 16)$ to $(6, 18)$ 4. From $(6, 18)$ to $(9, 18)$ 5. F…
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question 4 (1 point) which number is higher? 9. 2,109.8 or 2,107.9 10. …
b. 9.2,109.8; 10. 7,484.08
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(1 point) a senator wants to know what the voters of his state think of…
C. a survey containing nonresponse. ### Part (b)
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(1 point) (a) archaeologists plan to examine a sample of 2-meter-square…
C. A stratified random sample. ### Part (b)
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(1 point) a choral conductor has 1481 singers in her choir, some of the…
A. 15/640 ### Part (b)
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8. identify the errors in the equation. explain what the errors is/are …
Original errors: 1. Incorrect distribution of the negative sign: $(2x+5)-(5x+4)$ was simplified to $2x+5-5x+4$ instead of $2x+5-5x-4$. 2. Incorrect distribution of $-2$: $-2(x-3)$…
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(1 point) a market research company wishes to find out whether college …
B. which brand they prefer. ### Part (b)
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what is the equation of the trend line in the scatter plot? use the two…
$y=\frac{6}{5}x-\frac{14}{5}$
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1) what is the equation of the trend line in the scatter plot? 1) use t…
$y=\frac{3}{2}x-2$
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what is the equation of the trend line in the scatter plot? use the two…
$y=\frac{6}{5}x-\frac{24}{5}$
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a trailer can pull a total of 6,000 pounds. which pair of cars can the …
The pair with cars weighing 3,927 lb and 1,904 lb (the third pair: red truck and blue car).
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49 three classes collect cans for a recycling project. their goal is to…
B. No, the total number of cans is a bit less than 700.
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(1 point) a sample of 300 dentists from seattle is taken to estimate th…
B. NON - REPRESENTATIVE? ### Second Question:
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three classes collect cans for a recycling project. their goal is to co…
# Explanation: ## Step1: Estimate each class's cans Class A: 300 (exact), Class B: 98 ≈ 100, Class C: 185 ≈ 190. ## Step2: Sum the estimates Total ≈ 300 + 100 + 190 = 590? Wait, n…
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(1 point) identify each quantity as a parameter or statistic write \par…
parameter ### Part (b)
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(1 point) the mean height of american women is 64.5 inches. suppose we …
B. parameter. ### Part (b)
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5. what is the specific operation being done in order to generate each …
a. Add 2 to the previous term b. Divide the previous term by 3
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for each expression, estimate to decide whether the sum is closer to 40…
Closer to 500
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what is the equation of the trend line in the scatter plot? use the two…
$y=\frac{1}{3}x+3$
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what is the equation of the trend line in the scatter plot? use the two…
$y=\frac{4}{9}x+2$
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for each expression, estimate to decide whether the sum is closer to 80…
Closer to 800
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the population of butterflies in a zoo exhibit is modeled by the follow…
B. The population of butterflies is decreasing at a rate of 24%.
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what is the equation of the trend line in the scatter plot? use the two…
$y = \frac{7}{5}x - \frac{21}{5}$
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for each expression, estimate to decide whether the sum is closer to 80…
- \(415 + 400\): Closer to 800 - \(605 + 292\): Closer to 900
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for each expression, estimate to decide whether the sum is closer to 80…
Closer to 800
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a music store sells 512 guitars and 186 drums. which value is the best …
700
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4 two of the dozen eggs in a carton are cracked. about what percent of …
About 16.7% (or 17% when rounded) of the carton is cracked.
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what is the equation of the trend line in the scatter plot? use the two…
$y=\frac{2}{3}x+5$
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the function ( p(x) = 4x ) can be used to find the perimeter of a squar…
B. The perimeter of a square with side length 3.25 units is 13 units.
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what is the equation of the trend line in the scatter plot? use the two…
$y = \frac{5}{6}x + 1$
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first, round each number to the nearest hundred. 193 rounds to? 301 rou…
193 rounds to 200; 301 rounds to 300
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what fraction of students in the sample take dance? \\(\\frac{3}{20}\\)…
15
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all students at micahs school are required to take one fine arts class.…
$\frac{3}{20}$
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(\frac{6.94\times10^{-4}}{7.98\times10^{6}-1.00\times10^{-8}}=\boxed{qu…
\(8.70\times10^{-11}\) (or approximately \(8.7\times10^{-11}\) depending on the required precision)
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the scores of a recent test taken by 1200 students had an approximately…
Approximately 54.17 (If we follow the calculation in the calculator $\frac{1200 - 225}{18}$) or 2 (if we follow the normal distribution calculation, but there is a discrepancy. If…