統計與機率
資料分析、機率分佈、假設檢定與統計方法。
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a spinner with 6 equally sized slices has 2 red slices, 1 blue slice, a…
\(\frac{1}{3}\)
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obtain the five - number summary for the given data. the weekly salarie…
A. \(453,541,636.5,718.5,826\)
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a bag with 10 marbles has 10 yellow marbles. a marble is chosen from th…
\(1\)
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find the range for the given data. rich borne is currently taking chemi…
\(37\) (Option A)
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find the mode(s) for the given sample data. 7.11, 7.41, 7.56, 7.11, 7.8…
A. \(7.11\)
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a new business had the following monthly net gains: $8,933.00 $2,254.00…
B. $5,088.50$
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last year, nine employees of an electronics company retired. their ages…
C. 59.4
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which of the distributions is multimodal and approximately symmetric? a…
B.
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which of the following distributions would have the least variation? a.…
D. Weights of all pet cats
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state how many peaks you would expect for the distribution described. s…
B. One
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state how many peaks you would expect for the distribution described. s…
B. Two
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identify the distribution as symmetric, left - skewed, or right - skewe…
A. Left - skewed
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identify the distribution as symmetric, left - skewed, or right - skewe…
A. Right - skewed
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question company x tried selling widgets at various prices to see how m…
Regression Equation: \(y=-1.47x^{2}+70.94x - 191.03\) Final Answer: \(648\)
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being a good citizen means caring about the good of society and working…
- "You can provide services for people in your community who need help." - "You can help make your community a better place to live." - "You can learn new skills while gaining kno…
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when the speaker personifies the ew voice\ that keeps her company, what…
the speaker’s inner strength
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when do we become who we are meant to be? when we are honest with ourse…
When we are honest with ourselves and the people in our lives
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which of the following would be an appropriate claim for the question \…
Skew dice are fair. Skew dice are unfair.
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a) fill out the blank cells in the table using functions sum, average, …
| Name | Math | History | English | Average | Sum | Max | Min | | --- | --- | --- | --- | --- | --- | --- | --- | | Jack | 75 | 87 | 89 | 83.67 | 251 | 89 | 68 | | Dan | 79 | 79 |…
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determine word meanings using prefixes inter - and anti - quiz - level …
antiseptic
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what are the quartiles of a distribution? how do we find them? what are…
C. The quartiles are values that divide the data distribution into quarters.
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describe how the range of a distribution is defined and calculated. cho…
C. The range of a data set is the difference between its highest and lowest data values.
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consider two grocery stores at which the mean time in line is the same …
B. The customers would have more complaints about the waiting time at the store that has more variation because some customers would have longer waits and might think they are bei…
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which data set would you expect to have the highest standard deviation:…
D. The heights of all elementary - school children, since it has the largest range.
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what does \antinoise\ mean? having less noise without noise able to mak…
against noise
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the lowest score on an exam was 68, the median score was 76, and the hi…
A. The range was 25, because that is the difference between the lowest score and the highest score.
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what does \interconnect\ mean? to prevent things from connecting to tak…
to make a connection between things
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make a word that means \protecting against bright light.\ anti leak int…
antiglare
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why did late - 1890s newspapers publish sensational stories about cuba …
A. Newspapers used the stories to sell more papers.
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question 5 1 point to compare means to a find differences b find both s…
B. Find both similarities and differences
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3. a theater is selling tickets to a play. adult tickets cost $8 each a…
The point \((30,7)\) satisfies the equation \(8x + 5y = 275\), which means when \(30\) adult tickets and \(7\) children's tickets are sold, the total money collected is \(\$275\).
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6. verbal language: a. includes any form of written messages that use w…
6. a. includes any form of written messages that use words such as business letters 14. b. is more commonly thought of as the dictionary definition
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verbal language: a. includes any form of written messages that use word…
B. is more commonly thought of as the dictionary definition
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a company manufactures tennis balls. when its tennis balls are dropped …
\(-1.711\)
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a company manufactures tennis balls. when its tennis balls are dropped …
\(-t_{0.95}=-2.064\) \(t_{0.95}=2.064\)
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use the standard normal distribution or the t - distribution to constru…
C. With 95% confidence, it can be said that the population mean yards per carry is between the bounds of the confidence interval.
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use the standard normal distribution or the t - distribution to constru…
A. The 95% confidence interval is \((4.51,5.49)\)
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5. a marble is randomly selected from a bag of 32 red and yellow marble…
\(\frac{3}{8}\)
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use the standard normal distribution or the t - distribution to constru…
A. Use a normal distribution because $\sigma$ is known and the data are normally distributed.
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the gas mileages (in miles per gallon) of 24 randomly selected sports c…
B. Neither the standard normal distribution nor the t - distribution can be used to construct the interval.
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use the standard normal distribution or the t - distribution to constru…
C. With 95% confidence, it can be said that the population mean interest rate is between the bounds of the confidence interval.
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use the standard normal distribution or the t - distribution to constru…
A. The 95% confidence interval is \((3.26,3.70)\)
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use the standard normal distribution or the t - distribution to constru…
C. Use a t - distribution because it is a random sample, \(\sigma\) is unknown, and the interest rates are normally distributed.
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use the standard normal distribution or the t - distribution to constru…
A. The \(90\%\) confidence interval is \((26.27,29.33)\) C. With \(90\%\) confidence, it can be said that the population mean BMI is between the bounds of the confidence interval.
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use the standard normal distribution or the t - distribution to constru…
B. Use a t - distribution because the sample is random, \(n\geq30\), and \(\sigma\) is unknown.
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problem 4 prisha rode her bike around town. her fitness tracker made a …
4
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the monthly incomes for 12 randomly selected people, each with a bachel…
\((4029.8,4496.6)\)
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by the 1900s, the railroad was the ______ means of transportation. olde…
fastest
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the monthly incomes for 12 randomly selected people, each with a bachel…
\(s = 260.2\)
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the monthly incomes for 12 randomly selected people, each with a bachel…
$4263.2$
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why does practicing negative ethics lose the interest of future investo…
C. Investors may not want their name to be associated with the business. D. Poor ethical practices usually mean lower profits.
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in a sample of 13 randomly selected high school seniors, the mean score…
The t - value of \(t = 3.41\) does not fall between \(-t_{0.95}\) and \(t_{0.95}\) because \(t_{0.95}=1.78\)
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the following data represent the concentration of dissolved organic car…
\((15.34,20.00)\)
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multiple choice question 14 listen what does it mean if you buy stock i…
C. You are a shareholder and get some of the company’s profits.
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the following data represent the concentration of dissolved organic car…
\(7.93\)
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the following data represent the concentration of dissolved organic car…
\(18.67\)
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the following data represent the concentration of dissolved organic car…
\(18.02\)
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the following data represent the concentration of dissolved organic car…
$20.06$
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the grade point averages (gpa) for 12 randomly selected college student…
\((1.59,3.01)\)
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the grade point averages (gpa) for 12 randomly selected college student…
\(s = 1.12\)
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the grade point averages (gpa) for 12 randomly selected college student…
$2.30$
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the state test scores for 12 randomly selected high school seniors are …
\((717.8,1104.2)\)
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the state test scores for 12 randomly selected high school seniors are …
\(s = 304.8\)
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2. gerardo is simplifying expressions with very large exponents. he arr…
a. Incorrect, because \(\frac{x^{150}}{x^{50}}=x^{100} eq x^{3}\). b. Correct, because \(y^{20}\cdot y^{41}=y^{20 + 41}=y^{61}\). c. Incorrect, because \((2m^{15}n^{2})^3 = 8m^{4…
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the state test scores for 12 randomly selected high school seniors are …
\(s = 304.8\)
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the state test scores for 12 randomly selected high school seniors are …
\(911.0\)
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the state test scores for 12 randomly selected high school seniors are …
\(994.3\)
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in a random sample of 7 cell phones, the mean full retail price was $52…
The t - value of \(t = 1.34\) fall between \(-t_{0.95}\) and \(t_{0.95}\) because \(t_{0.95}=1.94\)
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problems 5 - 6 the function ( p ( s ) ) models the perimeter of a squar…
80
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in a random sample of 8 cell phones, the mean full retail price was $53…
The t - value of \(t = 1.59\) fall between \(-t_{0.99}\) and \(t_{0.99}\) because \(t_{0.99}=3.00\)
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in a random sample of 8 people, the mean commute time to work was 35.5 …
D. The confidence interval found using the standard normal distribution is narrower than the confidence interval found using the student’s t - distribution.
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in a random sample of 8 people, the mean commute time to work was 35.5 …
\((28.4,42.6)\)
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in a random sample of 8 people, the mean commute time to work was 35.5 …
\( 7.09 \)
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in a random sample of five mobile devices, the mean repair cost was $70…
D. With 90% confidence, it can be said that the population mean repair cost is between the bounds of the confidence interval.
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cerrado means ___. open closed lost found
closed
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in a random sample of five mobile devices, the mean repair cost was $70…
\((59.03,80.97)\)
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in a random sample of seven cell phones, the mean full retail price was…
B. With \(90\%\) confidence, it can be said that the population mean full retail price of cell phones (in dollars) is between the interval's endpoints.
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1. convert to a decimal. \\( \\frac { 17 } { 25 } \\) 2. write the equi…
1. \(0.68\) 2. \(16\) 3. \(\frac{1}{6}\approx0.167\) 4. \(50.2\) 5. \(0.375\)
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in a random sample of seven cell phones, the mean full retail price was…
\((299.0,626.0)\)
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in a random sample of seven cell phones, the mean full retail price was…
\(163.0\)
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in a random sample of five people, the mean driving distance to work wa…
A. With 95% confidence, it can be said that the population mean driving distance to work (in miles) is between the interval's endpoints.
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1. mai built a model racecar to race for a school competition. ( m(t) )…
\(m(6)=10\), \(m(10)=12\), \(m(15)=12\), \(m(22)=22\), \(m(26)=46\) a. When the puppy is \(2\) months old, its weight is \(5\) pounds. b. The weight of the puppy at \(6\) months i…
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problem 6 this table shows the population of a city from 1988 to 2016. …
1992 and 1996, 2008 and 2012
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this table shows the population of a city from 1988 to 2016. determine …
\(-1125\)
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problem 4 $r(t)$ and $k(t)$ model the savings account balances of rafae…
Katie has a lower average rate of change in the last two years.
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in a random sample of five people, the mean driving distance to work wa…
\(9.3\)
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in a random sample of 25 people, the mean commute time to work was 32.6…
D. With 95% confidence, it can be said that the population mean commute time is between the bounds of the confidence interval.
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in a random sample of 25 people, the mean commute time to work was 32.6…
\(2.9\)
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in a random sample of 25 people, the mean commute time to work was 32.6…
\((29.7,35.5)\)
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find the t - value for the given values of \\( \\overline { x } \\), \\…
\(3.72\)
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use the given confidence interval to find the margin of error and the s…
The margin of error is \(2.42\)
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use the given confidence interval to find the margin of error and the s…
$8.79$
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use the given confidence interval to find the margin of error and the s…
The sample mean is $8.79$ and the margin of error is $2.42$.
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use the given confidence interval to find the margin of error and the s…
The margin of error is \(3.3\)
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use the given confidence interval to find the margin of error and the s…
$16.5$
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construct the indicated confidence interval for the population mean μ u…
\((14.2,14.6)\)
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name: pa evaluate and interpret graphs date: pd 1. mal built a model ra…
\(m(6) = 10\); \(m(10)=12\); \(m(15)=12\); \(m(22)=22\); \(m(26)=46\) For the meaning: - \(m(6) = 10\) means that after \(6\) seconds, Mai's car has traveled a distance of \(10\) …
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construct the indicated confidence interval for the population mean μ u…
\((12.3,16.5)\)
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find the margin of error for the given values of c, s, and n. c = 0.99,…
\(2.012\)
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find the margin of error for the given values of c, s, and n. c = 0.90,…
\(2.288\)