Statistics & Probability
Data analysis, probability distributions, hypothesis testing, and statistical methods.
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a poll of 1012 americans showed that 47.4% of the respondents prefer to…
\(H_0:p = 0.5\) \(H_1:p<0.5\)
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suppose that in a random selection of 100 colored candies, 24% of them …
The P - value for this hypothesis test is \(0.752\)
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suppose that in a random selection of 100 colored candies, 24% of them …
The test statistic for this hypothesis test is $-0.68$.
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suppose that in a random selection of 100 colored candies, 24% of them …
B. \(H_0: p = 0.27\), \(H_1: p eq0.27\)
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a television show conducted an experiment to study what happens when bu…
For the two - tailed test (claim \(p = 0.5\)): \(P - value = 0.575\) For the one - tailed test (claim \(p>0.5\)): \(P - value=0.288\)
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a television show conducted an experiment to study what happens when bu…
- For the two - tailed test (\(H_0:p = 0.5\) vs \(H_1:p eq0.5\)): Fail to reject \(H_0\). There is not sufficient evidence to reject the claim that the proportion of buttered - s…
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find the sample size needed to estimate the mean age of movie patrons s…
B. 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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a television show conducted an experiment to study what happens when bu…
\(z=-0.56\)
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a television show conducted an experiment to study what happens when bu…
\(H_0:p = 0.5\) \(H_1:p eq0.5\)
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an iq test is designed so that the mean is 100 and the standard deviati…
Yes. This number of IQ test scores is a fairly small number.
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in a newspapers survey of 468 people, 54.7% said that we should replace…
There is sufficient evidence to support the claim that half of us say that we should replace passwords with biometric security is not True.
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in a newspapers survey of 468 people, 54.7% said that we should replace…
The null hypothesis is \(H_0:p = 0.5\). We reject the null hypothesis.
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which of the following means strong wind? choose one option a wave b gu…
B. Gust
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a food safety guideline is that the mercury in fish should be below 1 p…
C. No, because it is possible that the mean is not greater than 1 ppm. Also, at least one of the sample values exceeds 1 ppm, so at least some of the fish have too much mercury.
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1. what does the word embarked mean? 2. without looking it up, what can…
1. Boarded a ship. 2. Got off a ship. 3. Embarked: Roughly 50,000; Disembarked: Roughly 40,000. 4. Slaves dying during the voyage. 5. Abolition of the slave trade in many countrie…
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a certain drug is used to treat asthma. in a clinical trial of the drug…
The null hypothesis is \(H_0: p = 0.08\) (Option C). We fail to reject the null hypothesis because the \(p\) - value (\(0.1133\)) is greater than the significance level (\(0.01\)).
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a certain drug is used to treat asthma. in a clinical trial of the drug…
\(P - value=0.113\)
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a food safety guideline is that the mercury in fish should be below 1 p…
$0.438\ \text{ppm}<\mu<1.002\ \text{ppm}$ Since the upper limit of the confidence interval ($1.002$ ppm) is slightly above $1$ ppm, it appears that there might be too much mercury…
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a certain drug is used to treat asthma. in a clinical trial of the drug…
\(z=-1.21\)
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use the results from a survey of a simple random sample of 1235 adults.…
\(p = 0.8\)
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which investment type is a fixed income investment, meaning you get pai…
Bonds
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use the results from a survey of a simple random sample of 1235 adults.…
$\hat{p}=0.85$
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samples of dna are collected, and the four dna bases of a, g, c, and t …
\(2.0<\mu<3.2\)
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use the results from a survey of a simple random sample of 1235 adults.…
\(1050\)
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scatter plot shows the sale price of several food items, y, and the cos…
The predicted sale price of the item is \(\$5.98\).
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use the hypothesis testing: identify null and alternative hypotheses fl…
A. \(p = 0.60\)
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use the hypothesis testing: identify null and alternative hypotheses fl…
A. \(p\geq0.60\)
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22 christianity was a proselytizing religion, meaning which of the foll…
D. They wanted to convert others who did not believe in the same faith.
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identify the type i error and the type ii error that corresponds to the…
A. Fail to reject the claim that the proportion of people who write with their left hand is \(0.29\) when the proportion is actually different from \(0.29\).
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identify the type i error and the type ii error that corresponds to the…
D. Reject the claim that the proportion of people who write with their left hand is \(0.29\) when the proportion is actually \(0.29\).
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the test statistic of ( z = 2.71 ) is obtained when testing the claim t…
a. Two - tailed test b. \(0.007\) c. A. Reject \(H_0\). There is sufficient evidence to support the claim that \(p eq0.784\)
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the test statistic of ( z = 2.71 ) is obtained when testing the claim t…
\(0.007\)
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the ericsson method is one of several methods claimed to increase the l…
The \( P - value\) of \(0.001\) is preferred because it corresponds to the sample evidence that most strongly supports the alternative hypothesis (the method is effective).
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assume a significance level of \\( \\alpha = 0.05 \\) and use the given…
B. Fail to reject \(H_0\) because the P - value is greater than \(\alpha\).
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assume a significance level of \\( \\alpha = 0.05 \\) and use the given…
C. There is sufficient evidence to warrant rejection of the claim that the mean pulse rate (in beats per minute) of the group of adult males is 74 bpm.
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assume a significance level of \\( \\alpha = 0.1 \\) and use the given …
B. The mean pulse rate (in beats per minute) of the group of adult males is not 73 bpm.
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assume a significance level of \\( \\alpha = 0.1 \\) and use the given …
D. Reject \(H_0\) because the P - value is less than or equal to \(\alpha\)
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assume a significance level of \\( \\alpha = 0.05 \\) and use the given…
D. There is sufficient evidence to support the claim that the percentage of adults that would erase all of their personal information online if they could is more than 58%.
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assume a significance level of \\( \\alpha = 0.05 \\) and use the given…
A. Reject \(H_0\) because the P - value is less than or equal to \(\alpha\).
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which table shows a constant of proportionality of 2 for the ratio of s…
The third table (with percussion values 1, 2, 3 and string values 2, 4, 6) shows a constant of proportionality of 2 for the ratio of string instruments to percussion instruments.
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here are summary statistics for the weights of pepsi in randomly select…
\(0.82106\) lb\(<\mu<0.82494\) lb
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here are summary statistics for the weights of pepsi in randomly select…
\(E = 0.00227\) lb
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here are summary statistics for the weights of pepsi in randomly select…
\(2.03\)
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3. in november 1919, president woodrow wilson declared november 11th ar…
A. has done a certain job
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3. in november 1919, president woodrow wilson declared november 11th ar…
3. A. has done a certain job 4. B. After the large, destructive Second World War, Armistice Day was changed to include veterans from all wars. 5. C. How Veterans Day is Celebrated
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which line from narrative of the life of frederick douglass, an america…
"Education and slavery were incompatible with each other."
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which statement best expresses the theme of \vigil strange i kept on th…
War is cruel and indifferent to everyone, including youth
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3. financial literacy tanisha takes a dance class that is priced as sho…
The possible number of classes per week pairs are \((1,7)\),\((2,6)\),\((3,5)\),\((4,4)\),\((5,3)\),\((6,2)\),\((7,1)\) # C. Step - by - Step Format ## Step1: Evaluate the express…
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complete the sentence. jurisdiction means the power of special interest…
making laws and enforcing them
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amendment ix. \the enumeration in the constitution, of certain rights, …
Americans have rights that are not listed in the Bill of Rights.
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25. what creates text meaning? a. source details b. publication date c.…
25. C. Context 26. C. Source 27. A. Credible sources
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complete the sentence. ensuring <image> means ensuring peacefulness or …
domestic tranquility
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a landscaper applies weed killer to a lawn and records the area, in squ…
Linear Model 1 fits the data better than Linear Model 2 because Linear Model 1 is close to many data points.
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the table shows the number of hours students spend reading, x, and the …
There is a strong positive linear association.
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consider the data collected from a random survey of childrens and teena…
39%
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a combined group of middle and high school teachers complete a survey t…
It is more likely that a high - school teacher prefers to vacation in July than June.
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from the meaning of - trem -, what is the most likely meaning of the wo…
For the first question: the aftershock of an earthquake. For the second question: a vibrating or shaking effect.
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in \incident,\ what is the speaker remembering? the ku klux klan burnin…
Explanation Format
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the table shows the total profit, in dollars, from concert ticket sales…
There is a strong negative linear association.
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the linear model ( y = 0.17x + 2.45 ) represents the data a principal c…
\(3.98\)
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algebra 1 unit 3 lesson 6 practice name_ date_ period_ use this scenari…
1. The equation of the line of best fit is \(y=-1.81319x + 171.387\) 2. For every 1 - degree increase in temperature, the number of cups of hot chocolate sold decreases by approxi…
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algebra 1 unit 3 lesson 6 practice date period use this scenario for qu…
The equation of the line of best fit is \(y=-1.81319x + 171.387\)
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for questions 6 through 10, the scatter plot shows the relationship bet…
6. The slope is \(-1.4\). 7. The \(y\) - intercept is \(129.18\). 8. For every 1 - degree Fahrenheit increase in temperature, the number of heater sales decreases by \(1.4\). 9. T…
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and indeed there will be time to wonder, \do i dare?\ and, \do i dare?\…
unusual, meandering syntax and revelations about the speaker's thoughts and feelings
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for i have known them all already, known them all: have known the eveni…
despair and disillusionment: feeling that life is meaningless, introspection: thinking about why one does things, stream of consciousness: a rambling voice mirroring the confusion…
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7. stanley can make 80% of his free throw basketballs. if he shoots 20 …
\(16\)
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7. stanley can make 80% of his free throw basketballs. if he shoots 20 …
\(16\)
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here are 13 of alis walk times to the nearest restroom (in seconds): 26…
\(22\)
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an animal is randomly selected from this table. what is the probability…
\(\frac{1}{6}\)
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a bag contains 42 red, 45 green, 20 yellow, and 32 purple candy. you pi…
\(\frac{119}{139}\)
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find the expected value ($\\mu$) of the random variable with the given …
$6.76$
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a pair of standard dice are rolled. find the probability of rolling a s…
\(\frac{1}{36}\)
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what language family has the largest distribution in sub - saharan afri…
Niger - Kordafanian
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a student is randomly selected from this table. what is the probability…
\(\frac{5}{16}\)
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a bag contains 19 blue, 28 purple, 21 red, and 29 orange balls. you pic…
\(\frac{57}{97}\)
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use quadratic regression to find a function that fits the following poi…
\(-2x^{2}-4x + 9\)
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4) the random variable x has cumulative distribution function: f(x) = {…
D) 8
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3) a sample of 31 boxes of cereal has a sample standard deviation of 0.…
C) \((0.647,1.083)\)
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2) a study reports the mean change in hdl (high - density lipoprotein, …
D. We could be certain that the study result is within 6 mg/dl of the truth about the population if the conditions for inferences were satisfied.
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1) the average life a manufacturers blender is 5 years, with a standard…
C. 0.8351
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11. why can remittances be problematic? a. they widen the gap between t…
C. They are not taxed and cannot be traced.
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use quadratic regression to find the equation for the parabola going th…
\(y=-3x^{2}-14x + 12\)
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in the quadratic regression screen shown in the problem statement, why …
The maximum height of the ball occurs \(1.5\) feet from where it was thrown and the maximum height is \(8.7\) feet.
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in the quadratic regression screen shown in the problem statement, why …
\(1.5\)
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how can a rubric be used as a means of personal accountability and moti…
A rubric can be used as a guide to provide clear criteria for evaluating and improving artwork and encouraging self - reflection and growth.
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a. since the height increases then decreases, the quadratic graph must …
B. Since the height increases then decreases, the quadratic graph must open downward, not upward, which means a must be negative
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name a disadvantage of the alamo mission during the battle the high wal…
The high walls provided a good defense, however, the walls were thin, and crumbled during the battle.
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the annual profits for a company are given in the following table, wher…
The linear regression equation is \(y = 26.63x + 75.42\) and the projected profit for 2014 is \(288\) (in thousands of dollars)
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late 19th - century technological advances in farm production meant tha…
D. Many African Americans moved to the north and west to cities such as Chicago and Detroit.
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the annual profits for a company are given in the following table, wher…
The linear regression equation is \(y = 16.7x+46.3\). The profits would reach 144 thousand dollars in the year 2020.
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a mathematics teacher wanted to see the correlation between test scores…
The linear regression equation is \(y = 0.68x+26.32\). The projected test grade for \(x = 39\) is \(53\).
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6 - 17. aura currently pays $800 each month to rent her apartment. due …
Yes, her rent will equal her take - home pay. It will happen in \(20\) years. The rent that year will be \(\$1800\).
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a mathematics teacher wanted to see the correlation between test scores…
The linear regression equation is \(y = 0.77x+22.37\). The projected test grade for a student with a homework grade of \(39\) is \(52\).
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the annual profits for a company are given in the following table, wher…
The linear regression equation is \(y = 20.1x + 67.1\). The profits would reach 330 thousand dollars around the year 2012.
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5. the scale of a model airplane is shown in the graph. a. find the slo…
a. The slope \(m=\frac{5}{3}\) b. For every \(3\) centimeters of the model airplane, the actual airplane is \(5\) feet.
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is there a doctor in the house? a market research firm reported the mea…
\(H_0:\mu = 178238\), \(H_1:\mu eq178238\)
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the following is told by a boy who is talking about his father. select …
"I was glad my father was an eye - smiler. It meant he never gave me a fake smile because it's impossible to make your eyes twinkle if you aren't feeling twinkly yourself."
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2 which statement best describes population distribution in the us from…
A. As immigration increased, immigrants settled primarily in the North and West, where economic opportunities were the greatest
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college tuition: the mean annual tuition and fees for a sample of 22 pr…
The value of the test statistic \(t\approx - 0.79\)
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read the excerpt from cristina garcias dreaming in cuban. i dont really…
It manipulates the chronological order of events to reveal the close relationship between Pilar and her father.