Statistiques
Analyse de données, distributions de probabilités et tests d'hypothèses.
-
what does it mean to say that a data point has a residual of 0? a. the …
B. The point lies directly on the regression line.
-
read the paragraph about social media. social media outlets are often c…
Social media has a valid purpose as an inexpensive, creative marketplace.
-
a calculator was used to perform a linear regression on the values in t…
A. \(y=-3.6x + 12.8\)
-
miranda is conducting a poll to determine how many students would atten…
twenty names from each grade pulled blindly from a container filled with the names of the entire student body written on slips of paper
-
the two - way frequency table shows the number of students from each gr…
A total of \(76\) juniors and seniors were surveyed. Freshmen represent approximately \(27.6\%\) of the students.
-
a set of data points has a line of best fit of ( y = 2.5x - 1.5 ). what…
D. 1
-
read this paragraph from chapter 5 of the prince. whenever those states…
There are three means of holding a newly acquired state that is accustomed to freedom.
-
aditi downloads ten paid apps and sixteen free apps on her tablet. four…
\(P(\text{paid})=\frac{10}{26}\), \(P(\text{paid}|\text{game})=\frac{5}{14}\), the events “paid” and “game” are not independent.
-
which of the following graphs shows a negative linear relationship with…
B. Graph B
-
aditi downloads ten paid apps and sixteen free apps on her tablet. four…
\(P(\text{paid})=\frac{5}{13}\), \(P(\text{paid}|\text{game})=\frac{5}{14}\), The events “paid” and “game” are not independent.
-
data set: 2, 5, 7, 8, 10, 15, 23 variance: ( s^{2}=\frac{1}{6}sum_{i = …
\(30.28\)
-
the graph shows the volume of ice cubes versus temperature in degrees c…
D. Volume is the explanatory variable.
-
question 8 of 10 which of these r - values represents the strongest cor…
C. -0.8
-
consider the graphs below. what are the response variables? a. height, …
A. Height, Dollars, Width
-
suppose the correlation coefficient between a babys weight and the pric…
A. As the baby gains weight, computer prices tend to increase.
-
which of these r - values represents the weakest correlation? a. 0.2 b.…
A. \(0.2\)
-
which of these is not a possible r - value? a. - 0.5 b. - 0.1 c. 0.2 d.…
D. 1.75
-
suppose that there were a strong correlation between the variables g an…
A. \(g\) may cause \(h\)
-
what question was probably on shakespeares mind as he wrote macbeth? sh…
Who gets to rule and why?
-
question 1 of 10 which graph best represents the following situation? a…
B. Graph B
-
if events x and y are independent, what must be true? check all that ap…
\(P(Y | X)=P(Y)\), \(P(X | Y)=P(X)\)
-
the science club has five female and five male students. the club will …
\(\frac{2}{9}\) (the third option)
-
measures of spread 2, 5, 6, 8, 10, 12, 13, 25 you found that the five -…
23
-
question 16 (1 point) antonyms. choose the word that is most nearly the…
A. garrulous
-
measures of spread 2, 5, 6, 8, 10, 12, 13, 25 you found that the five -…
-5
-
read the excerpt from ovids \pyramus and thisbe\. and may you, mulberry…
A tree is given symbolic meaning.
-
ronelle asked 100 students to choose their favorite subject from among …
D. 52%
-
a teacher has asked all the students in the class which days of the the…
Bar graph
-
read this paragraph from the dark game. another thing that changed very…
During the Civil War, intelligence was gathered in the same ways it had been gathered in previous wars.
-
a veterinarian surveys her clients and finds that 32 percent of the hou…
B. \(P(D|C) = 0.44\), C. \(P(C\cap D)=0.11\), D. \(P(C\cap D)=P(D\cap C)\)
-
what does it mean to be a demagogue? * someone who represents the super…
Someone who exploits their constituents with false promises and does not deliver on them
-
when the weights of newborn babies are graphed, the distribu peak. whic…
Bell - shaped
-
tree type apple orange lemon banana pear number of trees 20 10 12 25 21…
Bar graph
-
a book shelf holds twenty books. eleven are hard - covered, nine of the…
1. \(\frac{4}{20}\) 2. \(\frac{11}{20}\) 3. \(\frac{4}{11}\)
-
a book shelf holds twenty books. eleven are hard - covered, nine of the…
1. \( \frac{1}{5} \) 2. \( \frac{11}{20} \) 3. \( \frac{4}{11} \)
-
evaluate the claim. an insurance company reported that, on average, cla…
The confidence interval is consistent with an average claim of \(\$942\) for this medical procedure.
-
24 multiple choice 4 points evaluate the claim. a weight - loss program…
With 95% certainty, the claim of losing 10 pounds on average during the first month of participation is false.
-
23 multiple choice 4 points construct the requested confidence interval…
\(CI_{.99}(\mu)=6\pm2.86(0.3354)\) (the third option)
-
22 multiple choice 4 points select the most appropriate response. which…
B. A reduction in the variability of the estimate
-
21 multiple choice 4 points select the most appropriate response. data …
If many samples are drawn, the computed confidence intervals will contain the population mean approximately 90% of the time.
-
which of the following relationships represents a positive correlation …
As the amount of water a plant receives increases, the growth rate of the plant increases.
-
20 multiple choice 4 points construct the requested confidence interval…
\((\$3.39,\$6.01)\)
-
19 multiple choice 4 points select the most appropriate response. in a …
Use a t - distribution.
-
18 multiple choice 4 points interpret the confidence interval. an exper…
We are 95% confident that the mean fat content of a quarter pounder with cheese is between 25 and 27 grams.
-
17 multiple choice 4 points construct the requested confidence interval…
(17.4, 21.8)
-
select the most appropriate response. an article in an educational jour…
540
-
according to a website where users review their doctors, 116 out of 119…
\( 1260 \)
-
15 multiple choice 4 points determine the width of the given confidence…
\(6\) (the fifth option)
-
data below represents students test scores. which of the following is t…
15
-
14 multiple choice 4 points construct the requested confidence interval…
\((\$142,\$158)\)
-
13 multiple choice 4 points construct the requested confidence interval…
$(79\%,85\%)$
-
12 multiple choice 4 points select the most appropriate response. what …
It will be narrower
-
11 multiple choice 4 points determine the margin of error. in a survey …
\(0.04\)
-
a phone company surveys a sample of current customers to determine if t…
23 customers 13 customers $\frac{13}{23}$
-
10 multiple choice 4 points select the most appropriate response. what …
It will be narrower
-
determine the necessary sample size. what is the approximate sample siz…
2401
-
construct the requested confidence interval. a survey of 300 union memb…
(32.7%, 41.9%)
-
26. what does cohesion mean in essay writing? a. including all details …
d. Logical connection
-
7 multiple choice 4 points determine the confidence level. determine th…
\(80\%\)
-
7 multiple choice 4 points determine the confidence level. determine th…
\(80\%\)
-
6 multiple choice 4 points construct the requested confidence interval.…
(0.184, 0.266)
-
each single american giver keeps alive the american cancer society, the…
B. Lover of mankind
-
following results. mean: 76 median: 77 range: 29 iqr: 12 the test was i…
1. \(81\) 2. \(82\) 3. \(29\) 4. \(12\)
-
5 multiple choice 4 points determine the sample proportion. it has been…
0.75
-
4 multiple choice 4 points determine the margin of error. it has been d…
$\pm0.02$
-
construct the requested confidence interval. a media poll of 500 air tr…
The correct option is $0.74\pm1.645\sqrt{\frac{(0.74)(0.26)}{500}}$.
-
find the range and interquartile range (iqr) of the data set: 21, 38, 4…
1. \(45\) 2. \(15.5\)
-
1 multiple choice 4 points select the most appropriate response. the pu…
For question 1: The purpose of statistical inference is to provide information about the population based upon information obtained from a sample. For question 2: 0.473.
-
simon rolls a number cube and picks a card from a standard deck. let ev…
- $P(E\cap K)$: the probability of rolling an even number and picking a king - $P(K\cup E)$: the probability of picking a king or rolling an even number - $P(K)$: the probability …
-
8. what is a key factor in determining the reliability of data? a. the …
d. The credibility and bias of the source
-
use the given degree of confidence and sample data to construct a confi…
D. \(173.8\space mg<\mu<196.2\space mg\)
-
a group of 59 randomly selected students have a mean score of 29.5 with…
C. \(28.4<\mu<30.6\)
-
a college student wanted to estimate the average amount of time spent t…
false
-
which of the following is not a reason childhood friendships are import…
B. Friends are a child's first chance in learning to be social with siblings
-
a college student wanted to estimate the average amount of time spent t…
true
-
researchers studied the mean egg length (in millimeters) for a particul…
B. We are 95% confident that the mean length of eggs for this particular bird population is between 45 mm and 60 mm.
-
a random sample of 25 students in an introductory statistics course at …
A. Because the confidence intervals do not overlap, it appears that non - Introductory Statistics students at this university got more sleep last night, on average, than Introduct…
-
10. when the star soccer player was shown a yellow card that would have…
10. C. Expostulate 11. C. Ensnared
-
question 4 (1 point) which character said the following quote? place th…
Jack
-
a graduate student wanted to estimate the average time spent studying a…
A. The width of the confidence interval would be smaller.
-
a graduate student wanted to estimate the average time spent studying a…
B. 4 hours/week
-
a spinner has 4 equal - sized sections labeled a, b, c, and d. it is sp…
\(\frac{1}{8}\) (the first option)
-
which of the following means \the bank closes at one.\? (1 point) el ba…
El banco se cierra a la una.
-
consider a situation in which ( p(x)=\frac{4}{5} ) and ( p(y)=\frac{1}{…
They are independent because \(P(X)\cdot P(Y)=P(X\ and\ Y)\)
-
events a and b are independent. the probability of a occurring is \\fra…
\(\frac{1}{10}\) (corresponding to the first option)
-
find the sample size needed to estimate the percentage of adults who ca…
a. \(n = 4148\) b. \(n = 2847\)
-
marco has a bag of red, blue, and green tiles. which set of events woul…
A tile is drawn and replaced, and then a second tile is drawn.
-
the theoretical probability of a couple having a baby girl is $\\frac{1…
\(\frac{1}{8}\) (the first option)
-
multiple choice for what value of x will the data set below have a mean…
A. $x = 36$
-
a box contains different - colored marbles. if ( p(\text{blue})=\frac{1…
The events are dependent because \(P(blue)\cdot P(green) eq P(blue\ and\ green)\).
-
21, 38, 42, 37, 40, 38, 24, 66, 40, 54, 28, 40 • press each hotspot. • …
1. $39$ 2. $39$ 3. $40$
-
days before a presidential election, a nationwide random sample of regi…
We are \(95\%\) confident that the percentage of registered voters planning on voting for Robert Smith is between \(49\%\) and \(55\%\).
-
juan rolls a 6 - sided number cube 4 times. each time, the result is 2.…
Independent: Each outcome was unaffected by previous outcomes. Compound: Multiple events occurred.
-
a coin is flipped, then a number cube is rolled. the tree diagram shows…
\(\frac{1}{12}\) (the first option)
-
days before a presidential election, a nationwide random sample of regi…
We are \(95\%\) confident that the \(proportion\) of registered voters \(in\ the\ population\) planning on voting for Robert Smith is between \(49\%\) and \(55\%\).
-
heather has a bag containing 4 marbles: 1 red, 1 blue, and 2 green. she…
\(\frac{1}{32}\) (the second option)
-
days before a presidential election, a nationwide random sample of regi…
C. No, because \(50\%\) is within the bounds of the confidence interval.
-
which is a pair of dependent events? spinning a spinner one time and th…
removing a marble from a bag, not putting it back, and then removing a second marble
-
sample response: the students logic is incorrect. a coin being flipped …
Flipping a coin 6 times is 6 independent events.
-
a survey of 300 union members in new york state reveals that 112 favor …
C. $0.308 < p<0.438$