統計と確率
データ分析、確率分布、仮説検定、統計手法。
-
1. the table shows the relationship between hours studied and test scor…
A. Linear
-
2 the accessory choices of 143 people are recorded in the table. create…
| | Wearing a Watch | No Watch | |--|--|--| | Wearing a Belt | \(65.96\%\) | \(34.04\%\) | | No Belt | \(59.18\%\) | \(40.82\%\) |
-
the accompanying table shows the numbers of male and female students in…
\(0.154\)
-
homework question 3, 3.2.7 part 1 of 2 points: 0 of 1 the accompanying …
\(0.529\)
-
1 a teacher asks their students whether they studied for a quiz, then s…
The percentage of students who passed the quiz and studied.
-
by rewriting the formula for the multiplication rule, you can write a f…
\(0.923\)
-
the probability of event a, given that event b has occurred, can be fou…
\(0.278\)
-
a patient has a 57% chance of surviving bypass surgery after a heart at…
\(0.1767\)
-
in a recent year, about 34% of all infants born in a country were conce…
D. No, this is not unusual because the probability is not less than or equal to \(0.05\).
-
in a recent year, about 34% of all infants born in a country were conce…
\(0.780\)
-
in a recent year, about 34% of all infants born in a country were conce…
\(0.075\)
-
from the 8th to 11th centuries c.e., the vikings were arguably europes …
D. *The most famous Viking navigational tool was the sun stone, a mineral found in Iceland. The sun stone allowed the Vikings to analyze the sun's location even on cloudy days.* (…
-
in a sample of 1100 u.s. adults, 187 think that most celebrities are go…
\(0.311\)
-
in 1841, british cabinet - maker thomas cook transformed the world of t…
B. Cook's personal beliefs played a role in the origins and the success of his tour company.
-
in a sample of 1100 u.s. adults, 187 think that most celebrities are go…
\(0.689\)
-
in a sample of 1100 u.s. adults, 187 think that most celebrities are go…
$0.029$
-
research has shown that approximately 1 woman in 400 carries a mutation…
\(0.0016\)
-
two cards are selected from a standard deck of 52 playing cards. the fi…
\(0.006\)
-
identify the two events described in the study and determine if the res…
First part: B. Being around cell phones and developing lung cancer. Second part: C. Independent. Being around cell phones does not cause lung cancer.
-
identify the two events described in the study and determine if the res…
B. Being around cell phones and developing lung cancer. The events are independent because the study shows no relationship between being around cell phones and developing lung can…
-
question 13 3 pts the data: a11 = 5, a12 = 8, a13 = 18, a21 = 273, a22 …
\(0.4457\)
-
question 12 3 pts a college sends a survey to selected members of the c…
\(0.3474\)
-
a study found that people who suffer from obstructive sleep apnea are a…
B. Sleep apnea and heart disease; Dependent
-
question 11 the data: ( a_{11}=40, a_{12}=40, a_{13}=10, a_{21}=59, a_{…
\(0.4798\)
-
question 10 3 pts in a high school graduating class of 298 students, 13…
\(0.3591\)
-
for the given pair of events, classify the two events as independent or…
C. The two events are dependent because the occurrence of one affects the probability of the occurrence of the other.
-
determine whether the events are independent or dependent. explain your…
The events are dependent because the outcome of returning a rented movie after the due date affects the probability of the outcome of receiving a late fee.
-
a box contains 3 red marbles, 6 black marbles, and 1 yellow marbles. if…
\(0.36\)
-
question 9 3 pts a box contains 3 red marbles, 6 black marbles, and 1 y…
\(0.1\)
-
the data: a₁₁ = 14, a₁₂ = 9, a₁₃ = 24, a₂₁ = 126, a₂₂ = 107, a₂₃ = 275 …
\(0.9153\)
-
what does the notation p(b|a) mean? choose the correct answer below. a.…
C. The probability of event B occurring, given that event A has occurred
-
question 7 the data: a_{11}=21,a_{12}=71,a_{13}=5,a_{21}=87,a_{22}=17,a…
\(0.1019\)
-
question 6 3 pts a college sends a survey to selected members of the cl…
\(0.4051\)
-
the sample space for tossing a coin three times is: s = {hhh, hht, hth,…
a) \( 0.5 \) b) \( 0.375 \) c) \( 0.125 \)
-
question 3 the data: a₁₁ = 12, a₁₂ = 3, a₁₃ = 7, a₂₁ = 153, a₂₂ = 118, …
\(0.0055\)
-
question 1 3 pts a coin is tossed 2 times. what is the probability of o…
\(0.6008\)
-
(lesson 3.4 lc) this road sign means no trucks trucks ahead steep downh…
steep downhill ahead
-
question 19(multiple choice worth 3 points) (lesson 3.4 lc) this road s…
exiting construction zone
-
question 13 3 pts the sample space for tossing a coin three times is: $…
a) \( 0.5 \) b) \( 0.375 \) c) \( 0.125 \)
-
a college sends a survey to selected members of the class of 2019. of t…
\(0.4988\)
-
each of 14 mothers - to - be received 3d ultrasound scans, which showed…
\(0.3956\)
-
question 10 3 pts several health insurance companies are bidding for an…
\(0.25\)
-
the data $a_{11}=7$, $a_{12}=4$, $a_{13}=20$, $a_{21}=196$, $a_{22}=175…
\(0.0071\)
-
question 8 3 pts a box contains 8 red marbles, 8 black marbles, and 7 y…
\(0.3043\)
-
question 7 3 pts in a high school graduating class of 473 students, 107…
\(0.2579\)
-
question 5 3 pt the data $a_{11}=8,a_{12}=4,a_{13}=20,a_{21}=222,a_{22}…
\(0.9562\)
-
a person is selected at random for jury duty from a list of registered …
\(0.4456\)
-
in a high school graduating class of 358 students, 182 are on the honor…
\(0.5084\)
-
question 2 3 pts the data: a_{11}=34, a_{12}=49, a_{13}=7, a_{21}=60, a…
\(0.4857\)
-
question 1 3 pts a college sends a survey to selected members of the cl…
\(0.3361\)
-
1.1.5 how much can i expect to win? take a spin 3 - 47. consider the fo…
a. If you play 10 times, you expect to win $20$; if you play 30 times, you expect to win $60$; if you play 100 times, you expect to win $200$. b. If you play only once, the expect…
-
what is the range? 6 8 0 6 4 5 7 6
\(8\)
-
13. tracy made a venn diagram to compare the numbers of students in her…
Tracy has more friends in her history class (since \(22>21\)), there are \(22\) people in Tracy’s history class (\(7 + 15\)), there are fewer students in Tracy’s English class (\(…
-
find the median for the data items in the given frequency distribution.…
\(6\)
-
find the mode for the following group of data items. if there is no mod…
A. The mode is \(53\)
-
find the mode for the following group of data items. if there is no mod…
A. The mode(s) is/are \(93\)
-
find the median for the following group of data items. 9, 14, 7, 6, 13,…
\(10.5\)
-
10 the dot plot below gives the ages of the starting quarterbacks in a …
\(8\) years (Option C)
-
find the median for the following group of data items. 91, 93, 92, 97, …
$93$
-
find the median for the following group of data items. 26, 23, 22, 21, …
\(22.5\)
-
find the mean for the following group of data items. 135, 75, 105, 75, …
\(97\)
-
find the mean for the following group of data items. 74, 71, 73, 66, 71…
\(72\)
-
find the mean for the following group of data items 2, 4, 3, 6, 9, 1, 7…
\(4.875\)
-
use the data 1, 2, 3, 4, 4, 5. add 3 to each of the numbers. how does t…
C. The mean will be increased by 3, and the standard deviation will remain the same.
-
use the data 1, 2, 3, 5, 6, 7. without actually computing the standard …
B. 2
-
if a set of test scores has a large range but a small standard deviatio…
D. Most of students' test scores are around the mean, except that few students got scores much greater than the mean and few students got scores much less than the mean.
-
describe a situation in which a relatively large standard deviation is …
A. A university produces better learning outcomes when its students have diverse backgrounds.
-
determine whether each statement makes sense or does not make sense, an…
A. The statement makes sense. Data sets can have different means and the same standard deviation. For example, if two data sets contained the values \(\{1,3\}\) and \(\{2,4\}\), t…
-
determine whether the following statement makes sense or does not make …
A. The statement makes sense because there may exist some outliers (maybe much greater or much less than the rest of the data) in the data items.
-
the data sets give the number of platinum albums for the five male arti…
Standard deviation (Male artists) \(\approx31.17\) Standard deviation (Female artists) \(\approx8.53\)
-
4. tracy made a venn diagram to compare the numbers of students in her …
21
-
the data sets give the number of platinum albums for the five male arti…
B. Male artists have the greater mean number of platinum albums because all of the data items for the men are greater than the greatest data item for the women
-
find the standard deviation for the group of data items. the standard d…
\(7.98\)
-
use the display of data items to find the standard deviation. the stand…
\(1.98\)
-
use the display of data items to find the standard deviation the standa…
\(2.64\)
-
use the display of data items to find the standard deviation the standa…
\(1.60\)
-
use the display of data items to find the standard deviation. the stand…
\(1.84\)
-
use the display of data items to find the standard deviation. the stand…
\(2.00\)
-
use the display of data to find the standard deviation. the standard de…
\(0\)
-
a. use two sets of coordinates to write an equation to describe the rel…
The heart's resting heart rate is \(70\) beats each minute. The equation is \(y = 70x\). The equation \(y=70x\) means that the number of heart - beats \(y\) is directly proportion…
-
compute the mean, range, and standard deviation for the data items in e…
The samples are alike in terms of Mean and Range. The samples are different in terms of Standard Deviation. So for the first question (In which of the following ways are the sampl…
-
what is the probability of drawing an ace from a standard deck of 52 ca…
A. \( \frac{1}{13} \)
-
which of the following values represent impossible events? a. 1 b. \\( …
C. 0
-
compute the mean, range, and standard deviation for the data items in e…
Mean: \(45\), Range: \(36\), Standard Deviation: \(15.20\)
-
the probability of rolling a number less than 5 on a six - sided die is…
B. \(\frac{2}{3}\)
-
if an event has a probability of $\\frac{1}{2}$, it is considered: a. a…
d. an even chance event
-
what describes the set of all possible outcomes in a probability experi…
B. Sample space
-
compute the mean, range, and standard deviation for the data lons in ea…
Mean: \(45\), Range: \(36\), Standard Deviation: \(15.20\)
-
compute the mean, range, and standard deviation for the data items in e…
Mean: $45$, Range: $36$, Standard Deviation: $12.96$
-
which of the following probabilities indicates a certain event? a. 1 b.…
A. 1
-
what does a probability of 0 indicate about an event? a. the event has …
B. The event is impossible to happen
-
find the standard deviation for the group of data items. 19, 15, 19, 15…
$2.14$
-
which of the following best describes a probability of \\( \\frac { 1 }…
d. Unlikely
-
linear equations w/ distribution (lev 3) question solve for x: 5 - (2x …
\(x = 4.5\)
-
which formula is used to calculate the probability of an event e? a. ( …
C. \( P(E)=\frac{\text{Number of favorable outcomes}}{\text{Total number of possible outcomes}} \)
-
find the standard deviation for the group of data items. 19, 19, 20, 20…
$0.89$
-
what is the probability of drawing a red card from a deck that contains…
A. 0
-
find the standard deviation for the group of data items. 19, 19, 20, 20…
\(0.82\)
-
find a, the mean; b, the deviation from the mean for each data item, an…
| Data Item | 145 | 148 | 154 | 157 | 161 | | --- | --- | --- | --- | --- | --- | | Deviation | \(-8\) | \(-5\) | \(1\) | \(4\) | \(8\) |
-
the complete set of all possible outcomes in a probability experiment i…
sample