Estadística
Análisis de datos, distribuciones de probabilidad y pruebas de hipótesis.
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the box - and - whisker plot below represents some data set. what perce…
\(50\%\)
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because the brain is efficient, the retention of information often depe…
The false statement is “The brain efficiently encodes all stimuli and information in long - term memory in case it is needed later.”
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the box plot below represents some data set. approximately what percent…
\(50\%\)
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when is the best time to buy stocks? * 1 point when its in the blue whe…
1. B. when its in the red 2. A. the possibility of making a profit
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the box plot below represents some data set. what is the range of the d…
\(28\)
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the box plot below represents some data set. approximately what percent…
50%
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the box plot below represents some data set. what is the range of the d…
\(30\)
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the box plot below represents some data set. what is the interquartile …
\(20\)
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the box plot below represents some data set. what is the range of the d…
\(18\)
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question find the median and mean of the data set below: 27, 46, 11, 12…
Median \(=27\), Mean \(=26.2\)
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based on the following calculator output, determine the mean of the dat…
$58.6$
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based on the following calculator output, determine the mean of the dat…
$271.10$ (rounded to the nearest hundredth)
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based on the following calculator output, determine the range of the da…
42
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question 1 - 10 a book club tracked data on how long it takes to read b…
underpredicts
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select the correct answer. a florist gathered data about the weekly num…
C. 87
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7. -/10 points a survey of 15 large cities noted the average weekly com…
mean: \(4.07\) sample standard deviation: \(1.16\)
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question 1 - 6 which example best describes causation rather than corre…
The number of books in a box and the weight of the box.
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a survey of 10 fast - food restaurants noted the number of calories in …
mean: \(493.70\) sample standard deviation: \(19.93\)
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the fuel efficiency, in miles per gallon, of 12 small utility trucks wa…
mean: $23.75$; sample standard deviation: $3.76$
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credit card basics quiz 1. what does it mean to pay with a credit card?…
B. You use borrowed money from the bank, C. You pay with money you've already saved (Note: There is an error in the options. The correct understanding is that when using a credit …
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3. how many 5 - card hands can have at least 3 hearts in your hand?
\(242098\)
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5. how do concerns about violence impact community health? (ch 2) a. in…
5. d. Increases stress 6. b. Specific, Measurable, Achievable, Relevant, Time - bound 7. b. Tone of voice 8. d. Standing up straight
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a standard deck of 52 playing cards has 4 suits with 13 different cards…
1. The number of different 5 - card hands (when order doesn't matter) is \(2598960\) 2. The number of 5 - card hands of the same color is \(131560\)
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the graph below represents data that was collected by students on the n…
\(5\)
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answer the statistical measures and create a box and whiskers plot for …
\(Q1 = 5.5\), \(Med=11\), \(Q3 = 14\), \(Max = 16\)
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answer the statistical measures and create a box and whiskers plot for …
Min: \(6\), Q1: \(8\), Med: \(10\), Q3: \(13.5\), Max: \(16\)
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answer the statistical measures and create a box and whiskers plot for …
Min: \(6\), Q1: \(8\), Med: \(10\), Q3: \(14\), Max: \(15\)
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answer the statistical measures and create a box and whiskers plot for …
Min: \(3\), Q1: \(8\), Med: \(11\), Q3: \(13.5\), Max: \(16\)
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answer the statistical measures and create a box and whiskers plot for …
Q1: \(6.5\), Q3: \(13.5\)
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section 1: story - based vocabulary 1. what does the word lamented mean…
1. B. To express sorrow or regret 2. C. A feeling that one has been disrespected 3. B. To express disapproval or criticism 4. C. lacking harmony 5. A. Fighting noisily over someth…
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exercise 1: first read read the passage below to develop a general unde…
1. He was a teacher in rural district schools (1854 - 1864) and a government clerk in Washington (1864 - 1873). 2. He feels his life has been fortunate. Because he has suffered no…
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the pulse rates of 144 randomly selected adult males vary from a low of…
Since we need to round up to the nearest whole number, \(n = 54\)
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assume that all grade - point averages are to be standardized on a scal…
D. No, because the required sample size is a fairly large number.
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find the sample size needed to estimate the mean age of movie patrons s…
A. The sample should not be obtained from one movie at one theater, because that sample could be easily biased. Instead, a simple random sample of the broader population should be…
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an iq test is designed so that the mean is 100 and the standard deviati…
No. This number of IQ test scores is a fairly large number.
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the following text is adapted from alice dunbar nelsons 1899 short stor…
D. Skillfulness
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a food safety guideline is that the mercury in fish should be below 1 p…
\(0.199\) ppm \(<\mu<1.275\) ppm
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the following text is adapted from alice dunbar nelsons 1899 short stor…
D. Skillfulness
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samples of dna are collected, and the four dna bases of a, g, c, and t …
A. The given numbers are just substitutes for the four DNA base names, so the numbers do not measure or count anything, and they are at the nominal level of measurement. The confi…
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a clinical trial was conducted to test the effectiveness of a drug for …
The confidence interval \(73.2\) min\(<\mu<89.6\) min. The mean wake - time before treatment (\(104.0\) min) is not in the confidence interval. So the means before and after treat…
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a data set includes 105 body temperatures of healthy adult humans havin…
\(98.539^{\circ}F<\mu<98.861^{\circ}F\) Since \(98.6^{\circ}F\) is within the confidence interval \(98.539^{\circ}F<\mu<98.861^{\circ}F\), the sample does not provide sufficient e…
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here are summary statistics for the weights of pepsi in randomly select…
\(0.82249\) lb\(<\mu<0.82569\) lb
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here are summary statistics for the weights of pepsi in randomly select…
\(E = 0.00160\)
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here are summary statistics for the weights of pepsi in randomly select…
\(1.69\)
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here are summary statistics for randomly selected weights of newborn gi…
\(2834.7\) g \(<\mu<3465.3\) g
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here are summary statistics for randomly selected weights of newborn gi…
$t_{\alpha/2}= 2.72$
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refer to the accompanying data display that results from a simple rando…
a. \(85.74\space\text{min}<\mu < 91.76\space\text{min}\) b. The point estimate of \(\mu\) is \(88.75\) minutes. The margin of error \(E = 3.01\) minutes.
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refer to the accompanying data display that results from a simple rando…
\(85.74\) min \(\lt\mu\lt91.76\) min
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which of the following is not a property of the student t distribution?…
C. The standard deviation of the Student t distribution is \(s = 1\).
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fill in the blank. the number of _______ for a collection of sample dat…
degrees of freedom
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which of the following is not a requirement for constructing a confiden…
C. The confidence level is 95%.
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use the confidence interval to find the margin of error and the sample …
The margin of error is $0.112$ and the sample mean is $0.508$.
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which pricing strategy provides vendors that sell a companys goods a di…
Distribution
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use the confidence interval to find the margin of error and the sample …
The sample mean is \(0.508\)
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which of the following is not an equivalent expression for the confiden…
C. \(161.7\pm27.8\)
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which of the following would be a correct interpretation of a 99% confi…
A. We are 99% confident that the interval from 4.1 to 5.6 actually does contain the true value of \(\mu\)
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fill in the blank the _ is the best point estimate of the population me…
sample mean
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choose the adjective that means the same as : tímido a. histórico b. ho…
C. reservado
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choose the adjective that means the same as : cómico a. generoso b. pob…
C. gracioso
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express the confidence interval (0.057,0.149) in the form of \\( \\hat …
$0.103-0.046 < p < 0.103 + 0.046$
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express the confidence interval 0.111 < p < 0.555 in the form \\hat{p} …
$\hat{p}\pm E=0.333\pm0.222$
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find the critical value ( z_{alpha / 2} ) that corresponds to the confi…
$1.34$
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fill in the blanks. the margin of error______with an increased sample s…
C. decreases; increases
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some states now allow online gambling. as a marketing manager for a cas…
\(n = 664\)
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find the sample size needed to estimate the percentage of adults who ca…
\(n = 1234\) (rounded up to the nearest integer)
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use the given data to find the minimum sample size required to estimate…
C. 2115
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fill in the blanks. if the computed minimum sample size n needed for a …
D. up, larger
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fill in the blank to decrease the margin of error without decreasing th…
increased.
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use the sample data and confidence level given below to complete parts …
$0.344 < p<0.374$
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use the sample data and confidence level given below to complete parts …
\(E = 0.015\)
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use the sample data and confidence level given below to complete parts …
$0.359$
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use the sample data and confidence level given below to complete parts …
B. One has 95% confidence that the interval from the lower bound to the upper bound actually does contain the true value of the population proportion.
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use the sample data and confidence level given below to complete parts …
$0.028 < p<0.038$
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use the sample data and confidence level given below to complete parts …
\(E = 0.005\)
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use the sample data and confidence level given below to complete parts …
\(0.033\)
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a genetic experiment with peas resulted in one sample of offspring that…
a. $0.236 < p < 0.309$ (Note: The values you provided in the boxed area seem incorrect. The correct 95% confidence interval based on the formula is as calculated above). b. Since …
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use the sample data and confidence level given below to complete parts …
\(0.516\)
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the data given to the right includes data from 46 candies, and 9 of the…
No, because the confidence interval does not include 31%.
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the data given to the right includes data from 46 candies, and 9 of the…
$10.0\%<p<29.2\%$ Since the claimed value of $31\%$ does not lie within the $90\%$ confidence interval $(10.0\%,29.2\%)$, at the $90\%$ confidence level, there is sufficient evide…
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in a poll of 517 human resource professionals, 45.6% said that body pie…
A. The 99% confidence interval is wider than the 80% confidence interval. A confidence interval must be wider in order to be more confident that it captures the true value of the …
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in a poll of 517 human resource professionals, 45.6% said that body pie…
$0.428 < p < 0.484$
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in a poll of 517 human resource professionals, 45.6% said that body pie…
a. \(236\) b. \(0.400 < p<0.512\)
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in a poll of 517 human resource professionals, 45.6% said that body pie…
\(236\)
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a random sample of 5002 adults in a country includes 757 who do not use…
D. Because 46% is not contained within the confidence interval, it appears that the percentage of adults in the country who do not use the Internet is different from 46%.
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a random sample of 5002 adults in a country includes 757 who do not use…
$14.1\%<p<16.1\%$
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1 of the 350 songs dmarco downloaded, 24% were free. what is the total …
1. D. Not here (since the number of free songs is \(84\) and it's not among the first three options \(14\), \(64\), \(326\)) 2. D. \(\frac{42}{50}=\frac{x}{100}\) 3. D. \(75\%\) 4…
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my neighbor, martha, ran into my house crying and angry. \my car has be…
1. color 2. paid 3. own 4. understand 5. problems 6. recession 7. charges 8. create 9. fixed 10. unexpected
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4. the diagram below shows how much time antoine spends doing different…
A. 9.6
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if biblio is a word root meaning \book,\ and phil means \love,\ what is…
someone who adores books
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which statements accurately define archetypes? select three options. th…
B. They convey universal meanings and shared human experiences. C. They are universal symbols found in literature. E. They can include characters, plots, settings, objects, and th…
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wright works at a pizzeria. he records the ratio of the cups of cheese …
Graph \(W\) represents the pairs of values.
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which statement correctly describes the graph? a. the graph is continuo…
D. The graph is continuous because there are no gaps in the data.
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what is the range of the set of numbers above? a. {-0, -10, 6, 14} b. {…
C. \(\{-10,8,14\}\)
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which sample size will produce a margin of error of ±5.4%? 600 202 262 …
348
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a survey of 350 people shows that 210 have seen a movie in the last mon…
The margin of error for the first problem is approximately \(5.1\%\) Question 8: \(600\) Question 9: \(188\)
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when 1376 voters were polled, 82% said they were voting \yes\ on an ini…
For the margin of error question: \(\pm2.7\%\) For the confidence interval question: \(79.3\%-84.7\%\)
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justin read in the newspaper that 50% of voters in his city were voting…
\(601\)
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justin read in the newspaper that 50% of voters in his city were voting…
\(46\)
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justin read in the newspaper that 50% of voters in his city were voting…
\(46\)
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a survey of 850 people reported that 42% favored the re - election of t…
Margin of error: \(3.32\%\) Upper - bound of the confidence interval: \(45.32\%\)