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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several college students are surveyed about their college location and …
59 60
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a survey is given to 1,432 people about whether they take daily supplem…
| | take daily vitamins | no daily vitamins | |----------------|---------------------|-------------------| | eat breakfast | 27% | 33% | | no breakfast | 19% | 21% |
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4. 360 is increased by 25%. the result is then decreased by 50%. what i…
\(225\)
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b. original quantity: 10 new quantity: 16 c. original quantity: 50 new …
D. \(25\%\) increase
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an automobile dealership keeps track of the number of cars and trucks t…
Yes
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3. if the original quantity is 15 and the new quantity is 19, which is …
a. Each friend paid \( \$4\) for the parking fee. b. The percent increase is approximately \(48.5\%\). The original cost (for tickets) is \( \$16.5\) and the new cost (tickets + p…
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here is a relative frequency table. which value would best fit in the m…
A. 9
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2. what is the percent decrease? a. original quantity: 100 new quantity…
a. Amount of decrease: \( 100-88 = 12 \); Percent decrease: \( 12\div100=0.12 = 12\% \) b. Amount of decrease: \( 20 - 8=12 \); Percent decrease: \( 12\div20 = 0.6=60\% \) c. Amou…
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1. what is the percent increase? a. original quantity: 100 new quantity…
a. Amount of increase: \( 106-100 = 6 \); Percent increase: \( \frac{6}{100}=0.06 = 6\%\) b. Amount of increase: \( 16 - 10=6 \); Percent increase: \( \frac{6}{10}=0.6 = 60\%\) c.…
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directions respond to the prompt with a thoughtful response. use detail…
- A coordinate plane has 2 axes (x and y). Jenny labels x - axis "Number of Weeks" (independent variable) and y - axis "Number of Pages Read" (dependent variable). - In \((4,90)\)…
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the box-and-whisker plot below represents some data set. what is the ra…
80
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the box-and-whisker plot below represents some data set. what is the ra…
75
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choose a synonym for the underlined homonym (a word with two or more me…
C. foul
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directions respond to the prompt with a thoughtful response. use detail…
- A coordinate plane has 2 axes. Jenny should label the x - axis "Number of Weeks" and the y - axis "Number of Pages Read". - In \((4,90)\), 4 is the x - coordinate and 90 is the …
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unit test unit test complete 11 12 13 14 15 16 17 18 19 20 read the par…
by addressing the reader, by combining ideas in a complex sentence, and (wait, no, the options are checkboxes. So the three correct checkboxes are: - by addressing the reader - by…
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directions respond to the prompt with a thoughtful response. use detail…
1. A coordinate plane has two axes. Jenny should label the x - axis "Number of Weeks" and the y - axis "Number of Pages Read". 2. In the coordinate pair \((4,90)\), 4 is the x - c…
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ten used trail bikes are randomly selected from a bike shop, and the od…
The variance is \(435546.9\) and the standard deviation is \(660.00\)
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3. read the passage and then answer the question. on a camping trip, it…
B. small pieces of burning wood (assuming the second option is labeled B; if the original options had labels, use the correct label with the text. If not, based on the options, th…
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coral reefs are home to a variety of animals. for instance, more than f…
C. a collection of different things
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field goal % cha 44.7 bkn 44.8 3-pointer % cha 37.5 bkn 40.5 cha bkn fi…
The calculations show the percentages match the given data. For example, CHA's field goal %: $\frac{38}{85}\approx44.7\%$, BKN's: $\frac{43}{96}\approx44.8\%$; CHA's 3 - pointer %…
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stefano accidentally dropped his sunglasses off the edge of a canyon as…
176 meters
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4 multiple choice 1 point what does it mean if a system of linear equat…
Question 4: The lines are parallel and do not intersect. Question 5: The intersection point is $(x, y)$ where both equations are satisfied.
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unit test unit test complete 1 2 3 4 5 6 7 8 9 read the excerpt from \s…
A. The author uses verifiable facts and expert testimony to support her argument effectively, but the excerpt would be stronger if she deleted references to a past protest.
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use your knowledge of greek and latin roots to find the word which best…
D. quarrelsome
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use the formula for computing future value using compound interest to d…
2836.06
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while taking his statistics exam, charles is trying to remember a stati…
C. retrieve
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13. what type of crime is public intoxication? felony misdemeanor viola…
misdemeanor
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question 7, 7.3.13 part 2 of 4 hw score: 21.75%, 4.79 of 22 points poin…
\(-2.68\)
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1. in the case of liebeck v. mcdonald’s, the initial ruling found that …
The company was mostly responsible for the injuries.
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solve the problem. in a certain lottery, five different numbers between…
\(\frac{1}{1,860,480}\) (the third option)
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evaluate the expression. \\(\frac{9!}{6!}\\) (1 point) \\(\\circ\\) 54,…
504
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evaluate the expression. ₁₁c₄ (1 point) ○ 5040 ○ 3 ○ 1980 ○ 330
330
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evaluate the expression. $_{10}\text{p}_5$ (1 point) ○ 30,240 ○ 5 ○ 2 ○…
\(30240\) (corresponding to the first option \(30,240\))
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evaluate the expression. 4! (1 point) 24 28 20 6
24
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a bottling company marks a 0 for every bottle that comes out correct an…
\(\frac{1}{20}\)
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for every truck a police officer encounters she writes down t, for ever…
\(\frac{3}{19}\)
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on his way to work each day, steve encounters one traffic light. he rec…
\(\frac{11}{20}\)
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a jug of water is pierced and begins to drip. the number of seconds bet…
\(\frac{6}{17}\) (the second option)
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a coin is flipped and the results recorded: hthhttth estimate the proba…
0.4 is not an option. But if we assume the problem is about a fair coin (the most reasonable assumption when no information about the coin being biased is given other than a short…
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4) steve scored 15 points on a 25 point test. what percent of the possi…
60%
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event a has a 0.3 probability of occurring and event b has a 0.4 probab…
\(0.42\) (the third option)
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if chi-square is 7.91 and the critical value is 7.81, then the result i…
First [Select]: The Chi - square statistic (7.91) is greater than the critical value (7.81) Second [Select]: reject
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find the indicated probability. express your answer as a simplified fra…
\(\frac{4}{51}\) (the third option)
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in a study to determine whether there is a relationship between politic…
\(2\) (the option with 2)
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find the indicated probability. a charity is conducting a raffle, and i…
\(0.00533\)
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a charity is conducting a raffle, and it sells one ticket each to 35 wo…
\(0.00533\)
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find the indicated probability. in one town, 39% of all voters are demo…
0.152
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find the indicated probability. a local factory uses a manufacturing pr…
0.343
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determine which of the following pairs of events are dependent. (1 poin…
B. A: You cook your chicken improperly. B: You get salmonella poisoning.
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a 6-sided die is rolled. find the probability that either a 3 or a 5 is…
\(\frac{1}{3}\) (corresponding to the first option)
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a spinner has equal regions numbered 1 through 21. what is the probabil…
\(\frac{2}{3}\)
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2. cece and owen are visiting the library with their mother. based on t…
a. The probability that Cece wants to check out 1 book and Owen wants to check out 1 book is \(0.07\). Other ways: Cece 0 - Owen 2 (\(P = 0.0275\)) and Cece 2 - Owen 0 (\(P = 0.04…
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the probability that an event will occur is 0.1. what is the probabilit…
0.9
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describe the population represented in the venn diagram below. (1 point…
The shaded region represents females who are both right - handed and wear glasses.
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if two events, a and b, never occur at the same time they are ______. (…
disjoint
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express the indicated degree of likelihood as a probability value. \it …
\(1\)
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answer the question. what is the probability of an impossible event? (1…
0
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the probability of a certain event occurring is 0.27. what is the proba…
\(0.73\)
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(a) which city had a smaller range of noon temperatures? city a (b) whi…
(a) A. City A (b) B. City B (c) (Depends on the data, e.g., if City B has a larger $Q3 - Q1$, then B. City B; if City A, then A. City A) (d) (Depends on the data, e.g., if City B …
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since the beginning of the year, 1982 people have come into a blood ban…
0.172
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express the indicated degree of likelihood as a probability value. \the…
B. \(0.40\)
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the noon temperatures (in fahrenheit) for two cities were recorded over…
(a) City A (b) City B
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author point of view ryans argument school should start later in the mo…
Suggest adjusting the schedule so students get enough sleep without affecting after-school plans.
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use context clues to find the meaning of the underlined word. i had to …
change the time of
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use context clues to find the meaning of the underlined word. the teach…
story
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there appears to be a (strong, moderate, weak) (positive, negative) cor…
strong, positive
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lesson 6.4 homework 1. the means and standard deviations of independent…
a. Mean of \(U\): \(68\), Standard deviation of \(U\): \(6.5\) b. Mean of \(V\): \(87.8\), Standard deviation of \(V\): \(\approx10.23\) c. Mean of \(W\): \(18.2\), Standard devia…
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cumulative exam cumulative exam review active 1 2 3 4 5 6 7 8 9 10 whic…
C. And she had to apologize at once for her voice, which was a very unfair voice for a woman to use. Her voice was a warm, luminous, timeless melody.
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the equation for the line of best fit is $y = 5x + 25$. according to th…
The second statement "There would be about 25 skiers on a day with a high temperature of \(0^{\circ}F\)" is true.
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an imports retailer sells handcrafted wood sculptures from a number of …
\( 180^\circ \)
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a beauty salon in burlington has four beauticians and keeps track of ho…
\( 54 \)
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albert, who just won the election for student body president at westfor…
45
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the equation for the line of best fit is $y = 0.4x + 60$. according to …
Dan can expect to score about \(60\%\) if he does not spend any time studying.
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cedarburg junior highs students completed a survey about their favorite…
6
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people walking in downtown millersburg were interviewed about their fav…
18
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the students at trevino middle school were interviewed about their favo…
36
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the lakeside chamber of commerce compared the local dealerships vehicle…
64
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the following two - way table summarizes the marital status and job sta…
\(73.2\%\)
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teachers at livingston elementary school asked students to name their f…
33
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the following two - way table summarizes the number of cancer patients …
Clinic A treated many more patients with active cancer than Clinic B.
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students in applied majors mechanical engineering $\frac{1}{2}$ archite…
21
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a sample of statistics students were asked to report their marital stat…
the conditional distribution of football interest among single students
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to describe the relationship between two categorical variables measured…
a two - way table
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which of the following is most likely to illustrate the effects of simp…
A. patient outcome statistics comparing results for regional hospitals and large teaching hospitals.
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the following table summarizes the marital status and job status for a …
conditional
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tisha kept track of the number of characters in each book she read. cha…
430
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given is a table showing the results of a simple random sample asking r…
44/61 = 72.1% (the option with this calculation)
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Question was provided via image upload.
lurking (or confounding)
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below is a table showing the results of a simple random sample asking r…
33/75
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tisha kept track of the number of characters in each book she read. cha…
430
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to analyze categorical variables, we use ______ or percentages of indiv…
frequencies
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some students were polled about the paper they use for notetaking. pape…
100
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how much more money was raised for medical research in may than in apri…
$150
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how strongly do physical characteristics of sisters and brothers correl…
63.0
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identify the homograph and define it. i couldnt believe that they chose…
The homograph is "lead". It means the main role in a play or show.
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how strongly do physical characteristics of sisters and brothers correl…
For the correlation coefficient \( r \approx 0.555 \) (rounded to three decimal places). For the regression line \( \hat{y} = 28.0 + 0.521x \) (where \( x \) is brother's height a…
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in professor krugmans economics course, the correlation between the stu…
Slope: \( 0.1 \) Intercept: \( 47 \)
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the boxplot below shows salaries for construction workers and teachers.…
Markos makes more money. The difference is 15000 dollars.
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read the sentence below. what synonym ( a word that means the same) cou…
warship
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question 26 of 39 in professor krugman’s economics course, the correlat…
77