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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what does the constitutional guarantee of freedom of the press mean for…
C. They can report the news without getting the government's permission.
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review the passage. the simile is shown in bold. the desire to express …
It creates a feeling of being trapped.
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read the passage from a dolls house. nora: really! did a big dog run af…
They show that Nora goes from playing happily with her children to being startled by Krogstad, an unwelcome visitor.
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18. select the correct answer. in a factory that manufactures tires, a …
A. 0.4%
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click the arrows to choose an answer from each menu. the scale of the x…
36 on the x - axis represents January 2017. Moving one tick mark on the y - axis is a change of $0.005$.
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select the correct answer. the number of tomatoes sold weekly by a groc…
C. There is an 84% chance that the grocery store sells more than 390 tomatoes in a week.
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32. for these situations, state which measure of central tendency—mean,…
a. Mode b. Median c. Median d. Mode e. Mean f. Median
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select the correct answer. in an attempt to be environmentally friendly…
C. 21.3
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fill in the blank. whenever a data value is less than the mean, ____. w…
the corresponding z - score is negative.
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what did the founders mean by the term ule of law\? laws that apply equ…
A. laws that apply equally to everyone
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fill in the blank. a data value is considered ____ if its z - score is …
unusual
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the scatterplot above shows the number of visitors to a railroad museum…
A possible equation is $n=-2000t + 20000$ (where $n$ is the number of visitors and $t$ is the number of years since 1968)
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fill in the blank. when a data value is converted to a standardized sca…
z - score
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lucy observed cars passing on a highway for 1 hour and recorded the dat…
0.25
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the scatterplot above shows the number of visitors to a railroad museum…
A general form of the line of best - fit is \(n=-kt + c\) (\(k>0\), \(c\) is the number of visitors in 1968)
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use z scores to compare the given values. based on sample data, newborn…
Since the z - score for the male is $z=-2.58$ and the z - score for the female is $z = - 2.08$, the male has the weight that is more extreme.
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end of semester test 12 select all the correct answers. which of the fo…
To decide which citizens will be asked to participate in a county - wide poll, each citizen is assigned a number and the county uses a random number generator to determine the cit…
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4 which statement describes independent events? a fair 6 - sided cube h…
A. A fair 6 - sided cube has a different color on each side—red, blue, green, orange, purple, and yellow. Evan rolls the cube 3 times.
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look at the text below. if there is an error with subject - verb agreem…
The 2013 American Time Use Survey, released by the Bureau of Labor Statistics, found that 2.8 hours is the average amount of time that Americans spend watching television each day.
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3. the two - way frequency table shows how juniors and seniors get to s…
40.3%
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f^(-1)(0) = 21 hours (c) interpret the meaning of f(3). the height of t…
(c) The pool contains $f(3)$ kiloliters of water after Carl has pumped for 3 hours. (d) The pool will be completely drained in $f^{-1}(0)$ hours. (e) $f(f^{-1}(0)) = 0$; $f^{-1}(f…
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if we draw a card from those above, whats the probability that it has r…
The probability that a drawn card has rank 5 is 0.2. The correct option for the likelihood of drawing a card that is rank 5 given that it's gray is $P(\text{rank }5|\text{gray})$.…
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2. alberto surveyed the students in his homeroom and asked if they were…
0.25
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6 multiple choice 1 point which of the following represents the interse…
6. A. $P(A\text{ and }B)=P(A)P(B)$ 7. $\frac{1}{3}$ $\frac{1}{6}$
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in a game, a player has to guess a 3 - digit code in an attempt to unlo…
# Explicación: ## Paso1: Calcular el número total de códigos posibles Cada dígito tiene 10 opciones (0 - 9). Usando el principio fundamental de la contabilidad, el número total de…
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a certain bag of marbles has marbles of different materials (silver, go…
The events Silver and Small are independent. \(P(\text{small}|\text{silver})=\frac{1}{4}\)
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carl uses a pump to drain a swimming pool. the pool initially holds 105…
(a) $W = f(t)=105 - 5t$ (b) $f(3)=90$ kiloliters; $f^{-1}(0)=21$ hours (c) The pool contains $f(3)$ kiloliters of water after Carl has pumped for 3 hours.
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if we draw a card from those above, whats the probability that it has r…
The probability that a card has rank 5 given it's gray is 0.2. The events "gray" and "rank 5" are independent.
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type the correct answer in the box. use numerals instead of words. if n…
0.13
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2) a class has seven students. what is the probability that exactly fou…
$\frac{175000}{823543}$
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select the correct answer. a local grocery store decides to offer a fre…
A. Given the choice of a banana or an apple, twice as many shoppers will select an apple.
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kuta software - infinite precalculus binomial probability find the prob…
$0.27648$
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what does the dram shop act mean to a seller/server? if the seller/serv…
If the seller/server sells alcohol to an intoxicated person and they cause damage, injury or death, the seller/server can be held civilly liable by a court for their actions.
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read the sentence from the passage. there was a blare of heated rage mi…
A. A state of focused concentration
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from unit 1, lesson 9 the value of coins in the pockets of several stud…
C. 37.5 cents
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for the binomial distribution, which formula finds the standard deviati…
$\sqrt{npq}$
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fill in the blank. in the binomial probability formula, the variable x …
number of successes
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3. in paragraph 2, what does the author mean when she describes villanu…
A. His career is extremely successful.
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if a school is accredited, this means that it only offers degree progra…
A. False
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assume that different groups of couples use a particular method of gend…
a. The value of the mean is $\mu = 23.5$ The value of the standard deviation is $\sigma\approx3.4$ b. Values of $16.7$ girls or lower are significantly low Values of $30.3$ girls …
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question 14. read the sentence from the passage. there was a flare of h…
C. roar, D. shriek
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assume that a procedure yields a binomial distribution with n = 4 trial…
$0.250$
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read this sentence from paragraph 5 of the passage. paganos farm, angel…
D. something received from an ancestor
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use this dictionary entry to answer the question. seam: a line formed w…
A. dressmaker
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determine whether the given procedure results in a binomial distributio…
D. Yes, because the procedure satisfies all the criteria for a binomial distribution.
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determine whether the following procedure results in a binomial distrib…
D. It is not binomial because there are more than two possible outcomes
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fill in the blank. a ______ random variable has infinitely many values …
continuous
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6) at the lakeside resort, the probability that a guest room has a view…
The probability that a randomly - selected guest room has a view of the lake and a queen - size bed is $0.1776$. The probability that a randomly - selected guest room has a view o…
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the accompanying table describes results from groups of 10 births from …
The maximum value in this range is 8.2 girls. The minimum value in this range is 1.8 girls. A. Yes, 1 girl is a significantly low number of girls, because 1 girl is below the rang…
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in a survey, cell phone users were asked which ear they use to hear the…
B. No, the random variable x is categorical instead of numerical D. No, the sum of all the probabilities is not equal to 1 B. The table does not show a probability distribution B.…
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five males with an x - linked genetic disorder have one child each. the…
A. Yes, the table shows a probability distribution. A. $\mu = 2.5$ child(ren) A. $\sigma = 1.1$
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determine whether the following value is a continuous random variable, …
a. B. It is a continuous random variable b. Not a random variable c. Discrete random variable d. Discrete random variable e. Continuous random variable f. Discrete random variable
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determine whether the value is a discrete random variable, continuous r…
a. A. It is a discrete random variable. b. It is a continuous random variable. c. It is not a random variable. d. It is a continuous random variable. e. It is a continuous random …
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based on the text, which is an effect of government energy regulations …
They influence consumer decisions about which appliances to purchase.
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nana measures the lengths of mice. their lengths, in centimeters, are r…
\(1.9\)
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la velocidad del casco de un barco se aproxima mediante la función (v =…
$v_s = 1.34\sqrt{l_n - 10}$, $l_n\geq10$
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read the excerpt from \the rosetta stone\. egyptian scripts were replac…
After Coptic became the prominent script, it was replaced by Arabic, which resulted in breaking society's connection to ancient times.
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the scatter plots from two different sets of data are graphed below. ex…
Graph A is a bad model for the data because the points are randomly scattered. Graph B is a good model for the data as the points seem to follow a trend.
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read this paragraph from the dark game. another thing that changed very…
Most espionage during the Civil War was fieldwork that included observation, scouting, and interrogation of prisoners.
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which action would gandhi most likely embrace as a means of change? par…
A. participating in a hunger strike
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we believe that the people are greater than any foreign - power or pote…
1. Members are native - born, white, Gentile, Protestant women. Goals are maintaining racial purity, protecting homes/children, and ensuring American prosperity. 2. Beliefs are wh…
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8. which vocabulary term means asking questions to make sure the messag…
8. b) Clarification 9. a) Feedback 10. b) A worker opens the wrong valve because directions weren’t followed 11. b) To confirm instructions are understood and prevent mistakes 12.…
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which statements describe the shah’s rule of iran in the 1950s and 1960…
He invested in industrialization and modernization. He suppressed free speech and other civil liberties. He signed lucrative oil deals with Western countries. He established a lan…
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1. a child at this stage would observe the consistency in santa’s cloth…
B. Preoperational Stage
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based on a survey, 39% of likely voters would be willing to vote by int…
a. $0.00528$ b. A. Yes, because the probability of 10 or more is $0.00631$, which is low c. $0.996$
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give the conditional distribution of arrival status for cloudy days. ro…
On time: 95.8%, Delayed: 4.2%
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who has the greater range, farm x or farm y? farm x neither farm y thei…
Their ranges are the same
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how can an outlier affect your data? it can cause your mean, standard d…
It can cause your mean, standard deviation, and range to increase or decrease.
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the data value that has the greatest frequency in a data set is called.…
the mode
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if the distribution is bell shaped which measure of center and measure …
The measure of center is the mean and the measure of variability is the standard deviation (or variance). Among the given options, the closest is mean and MAD (though standard dev…
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marbles problems fill in the blank 3 points find the probability of dra…
$P(\text{red})=\frac{13}{27}$ $P(\text{red}|\text{steel})=\frac{13}{27}$
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describe the shape of the dot plot.
Symmetrical
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8. diversification in investing means: a. putting all your money in one…
8. C. Spreading your investments across different asset types 9. C. REIT 10. B. Stocks 11. F 12. T 13. F 14. T 15. T 16. One advantage is liquidity (easy access to money). 17. Com…
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mad (mean absolute deviation) a measure of center calculated by finding…
A measure of variability calculated by averaging the distances of data values from the mean.
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what does work - life balance mean for most people? (1 point) prioritiz…
C. Meeting work and family commitments satisfactorily
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employee ages what is the minimum?
10
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what is the median? 1,2,3,4 3 2 2 and 3 2.5
2.5
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based on the box plot, what is the median number of eggs laid? 8 2 6 3
6
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directions: show all your work. indicate clearly the methods you use, b…
a. Region I has a right - skewed distribution with values ranging from about 60 to 90 and median around 75. Region II has a left - skewed distribution with values ranging from abo…
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read the text calling for reform of the spoils system. we hereby declar…
The spoils system hurts political parties and helps corruption grow.
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part b which phrase from paragraph 4 helps the reader understand the me…
C. "avoid making eye contact"
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floated on the consciousness of a new lease on life, all the hurried sc…
D. surreptitiously
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19 mccaffertys hesitant question startled the celebrity specialist into…
C. The description of the fog reflects McCafferty's oppressive anxiety.
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based on a survey, assume that 33% of consumers are comfortable having …
$n = 4$, $x = 2$, $p = 0.33$, $q = 0.67$
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day average temperature (°f) spicy salsa orders sunday 85 162 monday 86…
The number of spicy salsa orders decreases as the average temperature increases.
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39.8% of consumers believe that cash will be obsolete in the next 20 ye…
$0.410$
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day 2: download or print the pdf for this lesson and follow along in th…
Qualitative
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assume that when human - resource managers are randomly selected, 52% s…
$0.0008$
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day 2: download or print the pdf for this lesson and follow along in th…
Qualitative
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day 2: download or print the pdf for this lesson and follow along in th…
Quantitative
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day 2: download or print the pdf for this lesson and follow along in th…
Quantitative
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based on a survey, 37% of likely voters would be willing to vote by int…
a. $0.00075$ b. B. Yes, because the probability of 12 or more is $0.00086$, which is low c. $0.998$
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puns were used by shakespeare to explain historical background to the a…
add humor or hidden meanings to a scene.
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based on a survey, 37% of likely voters would be willing to vote by int…
a. $0.00075$ b. B. Yes, because the probability of 12 or more is $0.00077$, which is low.
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based on a survey, 37% of likely voters would be willing to vote by int…
a. $0.00075$ b. B. Yes, because the probability of 12 or more is $0.000774$, which is low.
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4) a grocery store orders 50 bags of oranges from a company’s distribut…
Yes, the mean weight of 3.85 pounds of the grocery store's sample is unusual. The simulation results are centered around 4.001 pounds, and 3.85 pounds is in the tail of the distri…
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based on a survey, 37% of likely voters would be willing to vote by int…
a. 0.00075 b. B. Yes, because the probability of 12 or more is 0.00076, which is low.
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based on a survey, 37% of likely voters would be willing to vote by int…
$0.00091$
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what does the word spoils mean in the quotation above? to the victor be…
D. items of value
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based on a survey, 37% of likely voters would be willing to vote by int…
$0.00016$