Statistiques
Analyse de données, distributions de probabilités et tests d'hypothèses.
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the table shows the test scores of students who studied for a test as a…
Both distributions are nearly symmetric, so the mean and the standard deviation are the best measures for comparison.
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how does looking at data help a company decide what to do with its mone…
Companies use math and probability models to understand the market and the risks involved with different investments.
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the box plots show the data distributions for the number of customers w…
interquartile range
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2. within a warehouse there are lightbulbs that are classified into thr…
The probability that the burned - out bulb was in the first group (\(0 - 1\) year old) is \(\frac{5}{49}\approx0.102\), in the second group (\(1 - 2\) years old) is \(0.5\), and i…
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review the fourth and fifth paragraphs scary pranks and tricks, bobbing…
They explain the origin of many contemporary Halloween traditions and then add information about similar customs in other cultures.
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flip a paper cup in the air and see how it lands. what is the probabili…
\(62\%\)
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the table shows the battery lives, in hours, of ten brand a batteries a…
Only Brand A data is symmetric, so standard deviation is the best measure to compare variability.
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study before answering which two of the following options best describe…
B. Categorical data, C. Data that has an explicit ordering
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study before answering which variables in the table are examples of cat…
Product ID, Shipping State
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you really struggle remembering to bring your lunch to work. each day s…
\(P(X = 8)\approx0.163\), \(P(X>7)\approx0.627\), \(P(6\leq X\leq9)\approx0.578\)
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2 in what way does \a modest proposal\ fit the definition of satire? a.…
B. It presents an argument for treating children like livestock, which the reader isn't meant to take seriously.
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what are the two basic types of data? select one or more statistical nu…
Numeric, Categorical
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you really struggle remembering to bring your lunch to work. each day s…
- \(P(X = 8)\approx0.149\) - \(P(X\lt10)\approx0.697\) - \(P(X\gt7)\approx0.636\) - \(P(6\leq X\leq9)\approx0.533\)
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two histograms showing the number of pets owned by boys and girls in a …
interquartile range
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study before answering which statement best uses data to describe a per…
Ash has a yearly income of $75,000
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fortify is a verb that means \to protect and strengthen.\ a fortificati…
noun
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a local county has an unemployment rate of 4.6%. a random sample of 15 …
a) \(0.0180\) b) \(0.9800\) c) \(0.0010\) d) \(0.9980\)
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review the excerpt from the code book. cryptanalysts realize that their…
mysterious
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question #10 given the following frequency distribution, what are the c…
\(2/16, 4/16, 6/16, 3/16, 1/16\)
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probability model non a jar of an unknown amount of red, blue, and yell…
57%
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question #9 given the following frequency distribution, what are the co…
\(2,6,12,15,16\)
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probability model non 80 59% draw a card from a box filled with numbere…
30%
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question #8 which data set best represents normally distributed data? ○…
The first data - set (with frequencies \(5,20,4,21,5\)) best represents normally distributed data.
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flip a paper cup in the air and see how it lands. what is the probabili…
$76\%$
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question #7 a frequency distribution is to be constructed with the foll…
\(63\)
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probability model non draw a card from a box filled with numbered cards…
25%
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a large fast - food restaurant is having a promotional game where game …
a) \(0.1473\) b) \(0.0606\) c) \(0.6570\) d) \(0.1603\)
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you really struggle remembering to bring your lunch to work. each day s…
$\mu_X:8.246$, $\sigma_X:2.541$, $P(X = 8):0.139$, $P(X\lt10):0.677$, $P(X\gt7):0.597$, $P(6\leq X\leq9):0.497$
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question #6 given the following frequency distribution, what are the co…
25/140, 18/140, 47/140, 33/140, 17/140
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what best describes the impact of biased or unrepresentative data? sele…
It can produce misleading findings and unjust results
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question #4 which of the following statements is most correct regarding…
Question #4: There is a large group of data in the center, with decreasing amounts to the left and right of the middle. Question #5: False
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a local county has an unemployment rate of 4.1%. a random sample of 16 …
a) \(0.0229\) b) \(0.9140\) c) \(0.0089\) d) \(0.9172\)
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question #2 determine the percentage frequencies for the following freq…
12.5%, 25%, 37.5%, 18.8%, 6.3%
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question #1 determine the relative frequency for the third class of the…
\(\frac{13}{30}\) (i.e., the fourth option \(13/30\))
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what best describes how data ethics applies to the interpretation stage…
Data ethics in interpretation involves analyzing findings impartially, not manipulating results to fit preconceived ideas.
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the following table represents the probability of the number of cars ow…
a) Yes, it is a valid discrete probability distribution. b) \(0.8\) c) \(0.917\)
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kekes kookies (https://kekekookies.com/) sells mini cookies in packs of…
a. \(0.28\) b. \(10.45\) c. \(49.0475\)
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a local bakery has determined a probability distribution for the number…
a. \(0.48\) b. \(0.59\) c. \(0.64\) d. \(0\) e. \(10.1\) f. \(0.42\)
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a jar of an unknown amount of red, blue, and yellow marbles sits before…
45%
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explain why the phrase in this sentence is nonrestrictive, or nonessent…
The phrase "Julian" is non - restrictive because it is extra information. The sentence's core meaning (youngest brother's height) remains when it is removed.
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probability model non a jar of an unknown amount of red, blue, and yell…
37%
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all gini coefficients must lie between 0 and 1. the lower the value, a.…
C. the closer the income distribution is to being equal.
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draw a card from a box filled with numbered cards. cards are returned a…
36%
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the table compares the expected outcomes to the actual outcomes of the …
The mean of the actual sums is more than the mean of the expected sums. The range of the sums is the same for both sets of data.
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what statement does the shaded region represent? not b not a a or b a a…
A and B
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flip a paper cup in the air and see how it lands. what is the probabili…
22%
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if a spinner has eight sections numbered 1 to 8, which of the following…
Events \(A\) and \(B\)
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the histogram shows the number of morning customers who visited north c…
The north restaurant can expect to have the same number of morning visitors as the south restaurant.
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flip a paper cup in the air and see how it lands. what is the probabili…
76%
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determine the number of people who participated in weight - training (w…
\(15\)
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determine the number of people who participated in weight - training (w…
\(25\)
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consider a single spin on the spinner shown below. which events are mut…
landing on an unshaded portion and landing on 2, landing on a shaded portion and landing on 3, landing on a shaded portion and landing on an unshaded portion
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flip a paper cup in the air and see how it lands. what is the probabili…
\(62\%\)
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the histogram shows the number of morning customers who visited north c…
- What is the best measure of center for comparing the number of visitors to the 2 restaurants? Mean - What is the best measure of variation for comparing the distribution of the …
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draw a card from a box filled with numbered cards. cards are returned a…
25%
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the table shows the yearly earnings, in thousands of dollars, over a 10…
The distribution of earnings for wage earners is more symmetric than the distribution of earnings for the self - employed.
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flip a paper cup in the air and see how it lands. what is the probabili…
17%
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flip a paper cup in the air and see how it lands. what is the probabili…
16%
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draw a card from a box filled with numbered cards. cards are returned a…
40%
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suppose the united states has a gini coefficient of 0.4 and sweden has …
C. The distribution of income is more equal in the Sweden.
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current attempt in progress according to the levels of processing model…
Recalling that "chlorophyll" comes from the words that mean "green" and "leaf."
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in the wild mantis shrimp tend to lurk in burrows near rocks or reefs i…
hide
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measures of poverty (for example, the poverty line) and the distributio…
B. First, these measures do not take into account income mobility over time. Second, these measures ignore the effects of government programs meant to reduce poverty.
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each letter of the alphabet is written on a piece of paper and put in a…
The number of favorable outcomes is \(5\). The number of possible outcomes is \(26\). So \(P(\text{vowel})=\frac{5}{26}\), or about \(19.23\) percent.
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in the united states, a. the degree of income mobility is relatively lo…
C. the after - tax income distribution of income is more equal than the before - tax distribution.
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probability model non draw a card from a box filled with numbered cards…
23%
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the box plots show the distributions of daily temperatures, in °f, for …
- Both distributions are skewed left. - The median and IQR would be the best measures to compare the data.
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draw a card from a box filled with numbered cards. cards are returned a…
39%
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box plots represent the birth weights, in pounds, ofes born full term a…
1. less than 2. less than 3. inter - quartile range
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probability model non draw a card from a box filled with numbered cards…
25%
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with one member trimming beef in a cannery, and another working in a sa…
reveal unhealthy practices in the food processing industry
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19. a. rewrite \\( \\sqrt 5 { 3 ^ { 4 } } \\) as an expression with a r…
$3^{\frac{4}{5}}$
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flip a paper cup in the air and see how it lands. what is the probabili…
13%
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probability model non a jar of an unknown amount of red, blue, and yell…
33%
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probability model non draw a card from a box filled with numbered cards…
60%
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draw a card from a box filled with numbered cards. cards are returned a…
33%
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according to a recent study, 8.9% of high school dropouts are 16 - to 1…
\(0.6854\)
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answer the question correctly to continue: which of the following best …
More groups have gained rights and contributed to the meaning of what it means to be an American.
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among 19 - to 44 - year - olds, 14% say they have used a computer while…
(a) \(0.0005\) (b) \(0.9995\) (c) \(0.4704\) (d) \(0.5296\)
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answer the question correctly to continue: how can symbols like the ame…
The flag's changing design reflects how the U.S. has grown and whose voices are included.
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determine whether the events e and f are independent or dependent. just…
A. E cannot affect F and vice versa because the people were randomly selected, so the events are independent.
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a train starts out slow, then it speeds up. what distance has the train…
4.2 miles
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a drone takes off, and flies up to 50 m, hovers, then descends. how lon…
5 seconds
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question 36 what does \probable cause\ mean? a rumor someone heard a go…
A good reason to believe a crime happened.
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speaker a: the african american demands equality — political equality, …
A. Speaker A
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what does \due process\ mean? the government can punish anyone at any t…
For the first question: The government must treat people fairly under the law. For the second question: Laws should be written down and shared publicly.
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which revision uses a subordinating conjunction to combine the two sent…
The concert attendees roared their approval while the band played a new song.
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flip a paper cup in the air and see how it lands. what is the probabili…
16%
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\when i say i believe in a square deal, i do not mean to give every man…
be given fair opportunities to compete.
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holly chooses seven out of nine plants for the front of her house with …
36
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flip a paper cup in the air and see how it lands. what is the probabili…
12%
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based on the nuance in the sentence below, what does torrential mean? t…
harsh
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a jar of an unknown amount of red, blue, and yellow marbles sits before…
Since the image does not provide the exact number of red and total marbles, we cannot calculate the exact probability. But if we assume from the options given (45%, 54%, 62%, 73%)…
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connotation vs. denotation in the great gatsby what type of connotation…
negative
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connotation vs. denotation in the great gatsby what type of connotation…
negative
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probability model non a jar of an unknown amount of red, blue, and yell…
27%
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active reading strategies active reading methods: 1. character analysis…
naming your favorite part
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a membership committee of three is formed from four eligible members. l…
- There are four ways to choose the committee. - There are three ways to form the committee if person D must be on it. - If persons B and C must be on the committee, there are two…
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flip a paper cup in the air and see how it lands. what is the probabili…
If we assume a reasonable number of trials (based on common experimental results for such cup - flipping experiments), the answer is 12%.
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active reading strategies active reading methods: 1. character analysis…
literary technique