Statistics & Probability
Data analysis, probability distributions, hypothesis testing, and statistical methods.
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1. what is the standard deviation of a distribution of numbers? a.) a m…
c. The average distance each observation in a distribution is away from the mean of that distribution # 2.
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a. you can be 90% confident that the population mean number of tornadoe…
D. You can be 90% confident that the population mean number of tornadoes is between the bounds of the 90% confidence interval, and 95% confident for the 95% interval.
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question 6 5 pts events ( a_1 ) and ( a_2 ) are mutually exclusive and …
\(0.1555\)
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you are given the sample mean and the population standard deviation. us…
\((63.94,138.06)\)
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question 27 of 28 if a population consisted of 32,000 people, a sample …
C. 3200
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question 4 5 pts events ( a_1 ) and ( a_2 ) are mutually exclusive and …
\(0.7302\)
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\peter, i have a question to ask.\ olivia smiled hopefully at her older…
By characterizing Peter as angry and unhelpful.
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question 26 of 28 roxanne likes to fish. she estimates that 30% of the …
A. 60%
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events ( a_1 ) and ( a_2 ) are mutually exclusive and form a complete p…
\( 0.2372 \)
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question 2 5 pts events ( a_1 ) and ( a_2 ) are mutually exclusive and …
\(0.473\)
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events ( a_1 ) and ( a_2 ) are mutually exclusive and form a complete p…
\(0.6046\)
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victoria is testing her hypothesis that if she flips a coin, then the c…
To make sure her results are reliable.
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question 21 of 28 suppose a normal distribution has a mean of 50 and a …
C. 0.025
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question 19 of 28 if there are 26 successes in a sample with a size of …
D. 0.65
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question 13 of 28 suppose the commute times for employees of a large co…
C. 8 minutes to 28 minutes
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use the values on the number line to find the sampling error. the sampl…
\(0.51\)
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question 12 of 28 a randomly generated list of integers from 1 to 5 is …
B. 40%
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in august 2022, the white house released a plan to forgive the payment …
a) \(0.09\) b) \(0.51\) c) \(0.49\)
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a recent survey of technology professionals who work in silicon valley …
a) \( 0.3969 \) b) \( 0.8631 \) c) \( 0.1369 \)
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22. read the following passage from a daughter of a railroad worker dur…
22. B. Her father's loss of a job 23. B. Close all the nation's banks and order inspections of those banks
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according to data from the unesco institute for statistics, globally, 3…
a) \(0.09\) b) \(0.51\) c) \(0.49\)
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unit: whole numbers progress write 6·6·6 in exponential notation. 6³ 21…
\(6^{3}\) (It seems there might be a typo in the options. If we assume the first option was meant to be \(6^{3}\), that's the correct exponential notation for \(6\cdot6\cdot6\))
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in august 2022, the white house released a plan to forgive the payment …
a) \(0.09\) b) \(0.51\) c) \(0.49\)
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a recent survey of technology professionals who work in silicon valley …
a) \(0.3969\) b) \(0.8631\) c) \(0.1369\)
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ch each correlation coefficient to the appropriate scatter plot. r = 0.…
\( r = 0.9 \) to the first scatter - plot (top - left), \( r = 0.4 \) to the second scatter - plot (top - right), \( r=-1 \) to the third scatter - plot (bottom - left), \( r=-0.5…
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according to data from the unesco institute for statistics, globally, 3…
a) \(0.09\) b) \(0.51\) c) \(0.49\)
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question 8 3 pts in the 2019 status of energy report issued by the neva…
a) \(0.7921\) b) \(0.9879\) c) \(0.0121\)
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question 8 of 28 a 90% confidence interval for a proportion is found to…
C. 0.40
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question 7 of 28 stacia randomly chooses a number from 1 to 10. what is…
A. \(\frac{3}{10}\)
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question 7 3 pts let e and f be the events in a sample space s for whic…
\(0.5388\)
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match each correlation coefficient to the appropriate scatter plot. r =…
- The scatter - plot with no linear pattern (random - looking) corresponds to \( r = 0 \). - The scatter - plot with a weak negative trend (points loosely going from upper - left …
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question 6 3 pts let a and b be independent events with ( p(a) = 0.93 )…
\(0.8556\)
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let a and b be independent events with p(a)=0.93 and p(b)=0.92. calcula…
\(0.8556\)
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question 5 3 pts if a and b are independent events with p(a)=0.45 and p…
\(0.45\)
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match each correlation coefficient to the appropriate scatter plot. the…
The first scatter - plot (with random - like point distribution around the line) has \(r = 0\), and the second scatter - plot (with a negative trend) has \(r=-0.5\).
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match each correlation coefficient to the appropriate scatter plot. the…
\(r = 0.6\) matches the first scatter - plot and \(r = 0\) matches the second scatter - plot.
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12. identify the benefits of after - tax investing. a. funds deposited …
a. Funds deposited in after - tax savings accounts may be liquidated without paying tax on the deposit. b. Funds deposited in investment accounts may earn gains, and long - term c…
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how was panofskys idea that radiant light means divinity reflected in g…
C. Both A and B
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an educational organization is analyzing whether there is a difference …
\(0.0001\)
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question 4 3 pts if ( p(a)=0.42 ) and ( p(b)=0.61 ), and ( p(a cup b)=0…
\(0.4754\)
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if a and b are independent events with ( p(a) = 0.97 ) and ( p(b) = 0.6…
\(0.9898\)
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question 2 3 pts if a and b are independent events with ( p(a)=0.13 ) a…
\(0.51\)
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using the sample result ( \bar{x}=49.9 ) and ( s = 5.9 ) from a random …
The \(P\) - value is approximately \(0.4562\). The conclusion is A. Do not reject \(H_{0}\). There is insufficient evidence to conclude that \(\mu<50\).
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let a and b be independent events with ( p(a) = 0.38 ) and ( p(acap b)=…
\(0.8158\)
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the cafeteria creates pre - made boxed lunches with equal numbers of th…
\(\frac{1}{12}\) (the fourth option)
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a spinner is divided into five sections, each in a different color, as …
The probability that the arrow will point to red is more than \(\frac{1}{5}\).
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a local doctors office logged the number of patients seen in one day by…
Mean, 30; Median, 29.5; Range, 11; Midrange, 29.5 (the fourth option)
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6. a plane is going to fly 200 miles at a planned speed of 530 miles pe…
\( T(150) \) represents the time (in hours) of the flight when the average head - wind speed is \( 150 \) miles per hour. # b.
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jefferson should move forward with its plan to build storm - water stor…
1. It answers the traffic concern with a flippant rhetorical question rather than meaningfully addressing the issue.
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the placement test for a college has scores that are normally distribut…
\(580\)
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directions: answer the multiple choice questions. 5 minutes 1. frankens…
1. C. It emphasizes Frankenstein’s rejection of the Creature. 2. C. fleeting 3. D. his lack of control 4. D. figurative language
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the table to the right shows selected ages of licensed drivers in one c…
\(35\)
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the table to the right shows selected ages of licensed drivers in one c…
95
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the table to the right shows selected ages of licensed drivers in one c…
12
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the table to the right shows selected ages of licensed drivers in one c…
12
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the results of a certain medical test are normally distributed with a m…
\(45.14\)
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complete the frequency table for the following set of data. you may opt…
| Interval | Frequency | |----------|-----------| | \(0 - 2\) | \(5\) | | \(3 - 5\) | \(0\) | | \(6 - 8\) | \(4\) | | \(9 - 11\) | \(3\) | | \(12 - 14\) | \(3\) |
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the results of a certain medical test are normally distributed with a m…
\(57.04\%\)
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question 2 / 5 a classmate posts a picture of her artwork online and ot…
D. Write positive feedback about her artwork.
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linear equations w/ distribution (lev 2) score: 2/4 penalty: none quest…
\(x=-4\)
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5 minutes 1. frankenstein uses the phrases “my enemy” and “my adversary…
1. C. It emphasizes Frankenstein’s rejection of the Creature. 2. C. fleeting 3. A. his remorse (This answer is incorrect. The correct answer is that it shows his determination for…
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linear equations w/ distribution (lev 2) score: 0/4 penalty: none quest…
\(x = - 2\)
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linear equations w/ distribution (lev 1) score: 4/5 penalty: none quest…
$z = 9$
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linear equations w/ distribution (lev 1) score: 3/5 penalty: none quest…
\(z = 1\)
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linear equations w/ distribution (lev 1) score: 2/5 penalty: none quest…
\(y = 8\)
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the results of a certain medical test are normally distributed with a m…
\(20.52\%\)
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the results of a certain medical test are normally distributed with a m…
\(4.66\%\)
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systolic blood pressure readings for a population of adults are normall…
\(-0.5\)
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systolic blood pressure readings for a population of adults are normall…
\(34.46\%\)
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systolic blood pressure readings for a population of adults are normall…
\(0.4\)
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systolic blood pressure readings for a population of adults are normall…
\(93.32\%\)
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question 1 / 5 if someone has a risk factor for bullying, what does tha…
B. They are more likely than someone without a risk factor to perpetrate or experience bullying.
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what role do government agencies play in a mixed market economy? they r…
They regulate some aspects of production and distribution.
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systolic blood pressure readings for a population of adults are normall…
\(1.5\)
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use the table below to find the percentage of data items in a normal di…
\(44.23\)
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question 4 of 28 elena is going to a farmers market for fresh produce. …
A. South market. There is a 0.52 probability of both cherries and asparagus being available.
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use the accompanying table of z - scores and percentiles to find the pe…
\(70.88\)
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use the accompanying table of z - scores and percentiles to find the pe…
\(29.12\)
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markus scored 85, 92, 82, and 94 on the first four tests of the semeste…
\(5(x + 5)=353 + x\) (the second option)
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use the accompanying table of z-scores and percentiles to find the perc…
\(99.81\%\)
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question 1 of 28 an 80% confidence interval is found to be (12,20). wha…
C. 4
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question 25 of 25 jalen randomly chooses a number from 1 to 10. what is…
A. \(\frac{7}{10}\)
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question 24 of 25 the estimate obtained from a sample of which size is …
C. 184
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question 23 of 25 you spin a spinner with 4 sections: 1 yellow (y), 1 p…
D. {Y, P, R, B}
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question 22 of 25 suppose that a randomly generated list of numbers fro…
A. 0,1
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question 21 of 25 suppose a normal distribution has a mean of 62 and a …
D. 66.8%
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which situation is the best example of competition in an economic syste…
B. A small CD store slashed its prices to attract customers from a larger store that sells CDs and DVDs.
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which situation is the best example of regulation in an economic system…
A state agency has been created to monitor the production and distribution of sports drinks.
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question 20 of 25 which confidence level would produce the widest inter…
C. 61%
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question 19 of 25 the amount of water dispensed by a water dispenser is…
D. 11.85 ounces to 12.35 ounces
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question 18 of 25 lan often takes his dog to the park. he estimates tha…
B. \(0.70\)
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question 17 of 25 which number of simulation trials would be likely to …
A. 70
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question 15 of 25 in a normal distribution, 95% of the data falls withi…
B. False
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(a) for these 25 dog sitters, as experience increases, the amount charg…
(a) increase (b) a positive (c) \(13\) dollars per hour
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question 14 of 25 a sample with a sample proportion of 0.4 and which of…
C. 60
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question 13 of 25 if a population consisted of 700,000 people, a sample…
D. 70,000
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question 12 of 25 if there are 52 successful outcomes in a sample with …
D. 0.65
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question 11 of 25 a 90% confidence interval for a proportion is found t…
D. 0.25
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question 10 of 25 suppose a normal distribution has a mean of 79 and a …
B. 0.025
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question 9 of 25 which option is an example of a survey? a. measuring t…
D. Asking students in a school how much time they spend exercising