统计与概率
数据分析、概率分布、假设检验与统计方法。
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an article in a journal reports that 34% of american fathers take no re…
B. 0.0019
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a random sample of 868 births included 425 boys. use a 0.10 significanc…
C. Fail to reject \(H_0\). There is sufficient evidence to warrant rejection of the claim that \(50.9\%\) of newborn babies are boys. C. The results do not support the belief that…
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a random sample of 868 births included 425 boys. use a 0.10 significanc…
The P - value is $0.263$. B. Fail to reject $H_0$. There is not sufficient evidence to warrant rejection of the claim that $50.9\%$ of newborn babies are boys.
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a random sample of 868 births included 425 boys. use a 0.10 significanc…
A. \(H_0:p = 0.509\), \(H_1:p eq0.509\) The test statistic for this hypothesis test is \(-1.12\)
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use the given information to find the p - value. also, use a 0.05 signi…
C. 0.0901; fail to reject the null hypothesis
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suppose we want to test the claim that the majority of adults are in fa…
A. Right - tailed
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5. a moving average line (e.g., 50 - day sma) on the chart helps studen…
5. B. Smooth out price data to identify trend direction 6. A. The number of shares traded; high volume during a move suggests strong conviction 7. B. Prices are generally rising a…
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suppose 249 subjects are treated with a drug that is used to treat pain…
The P - value is $0.203$. C. Fail to reject $H_{0}$. There is not sufficient evidence to warrant support of the claim that more than $20\%$ of users develop nausea.
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suppose 249 subjects are treated with a drug that is used to treat pain…
- Hypotheses: A. \(H_0:p = 0.20\), \(H_1:p>0.20\) - Test statistic: \(0.83\)
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which statement from \aint i a woman?\ is an example of pathos? well, c…
"I have borne thirteen children, and seen most all sold off to slavery, and when I cried out with my mother's grief, none but Jesus heard me!"
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read the passage from etiquette, by emily post new yorks bad manners ar…
B. justifiably criticized
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a genetic experiment involving peas yielded one sample of offspring con…
For the conclusion about the null hypothesis: B. Fail to reject the null hypothesis because the P - value is greater than the significance level, \(\alpha\). For the final conclus…
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a genetic experiment involving peas yielded one sample of offspring con…
B. Fail to reject the null hypothesis because the P - value is greater than the significance level, \(\alpha\).
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a genetic experiment involving peas yielded one sample of offspring con…
\(P - value = 0.168\)
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a genetic experiment involving peas yielded one sample of offspring con…
\(z\approx - 1.38\)
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a genetic experiment involving peas yielded one sample of offspring con…
D. \(H_0:p = 0.24\), \(H_1:p eq0.24\)
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a random sample of 875 births included 427 boys. use a 0.10 significanc…
C. The results support the belief that 51.3% of newborn babies are boys because there was no evidence to show that the belief is untrue.
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a random sample of 875 births included 427 boys. use a 0.10 significanc…
C. Fail to reject \(H_0\). There is not sufficient evidence to warrant rejection of the claim that \(51.3\%\) of newborn babies are boys.
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a random sample of 875 births included 427 boys. use a 0.10 significanc…
\(0.139\)
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read the passage from theodore roosevelt an autobiography in the yellow…
trials and tribulations
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a random sample of 875 births included 427 boys. use a 0.10 significanc…
The test statistic for this hypothesis test is $-1.48$
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a random sample of 875 births included 427 boys. use a 0.10 significanc…
D. \(H_0: p = 0.513\), \(H_1: p eq0.513\)
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in a study of cell phone usage and brain hemispheric dominance, an inte…
\(0.030\)
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in a study of cell phone usage and brain hemispheric dominance, an inte…
The test statistic \(z\approx - 1.88\)
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read the passage from theodore roosevelt: an autobiography i could not …
B. standard ruling
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in a study of cell phone usage and brain hemispheric dominance, an inte…
D. \(H_0:p = 0.2\), \(H_1:p<0.2\)
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a poll of 1161 americans showed that 46.6% of the respondents prefer to…
$0.010$
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a poll of 1161 americans showed that 46.6% of the respondents prefer to…
$z=-2.31$
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a poll of 1161 americans showed that 46.6% of the respondents prefer to…
\(H_0:p = 0.5\) \(H_1:p<0.5\)
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in a random selection of 100 colored candies, 22% of them are blue. the…
Fail to reject \(H_0\). There is not sufficient evidence to warrant rejection of the claim that the percentage of blue candies is equal to \(23\%\)
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read the excerpt from first joint debate at ottawa, by abraham lincoln.…
Yes, the author uses diction that is academic and formal
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suppose that in a random selection of 100 colored candies, 22% of them …
\(0.810\)
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suppose that in a random selection of 100 colored candies, 22% of them …
\(-0.24\)
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suppose that in a random selection of 100 colored candies, 22% of them …
D. \(H_0: p = 0.23\), \(H_1: p eq0.23\)
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television show conducted an experiment to study what happens when butt…
The intent of the experiment was to test \(H_0:p = 0.5\) and \(H_1:p>0.5\). Based on these results, there is not sufficient evidence to support of the claim that buttered toast wi…
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a television show conducted an experiment to study what happens when bu…
\(P - value = 0.029\)
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a television show conducted an experiment to study what happens when bu…
$z\approx - 2.18$
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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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the following text is from oscar wildes 1893 play lady windermeres fan.…
D. Bring about
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question 1 which of these would be least important to include in a summ…
A. La La Land Kind Cafe serves beverages to its communities in bright yellow cups.
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a data set about speed dating includes \like\ ratings of male dates mad…
Reject \(H_0\). There is sufficient evidence to conclude that the mean of the population of ratings is less than \(7.00\).
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a data set about speed dating includes \like\ ratings of male dates mad…
The P - value is approximately \(0.000\) (rounded to three decimal places).
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darren collects data on the u.s. population from 1920 to 2020. he graph…
\(371.65\)
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a data set about speed dating includes \like\ ratings of male dates mad…
The test statistic is approximately \(-3.45\)
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practice and problem solve: darren collects data on the u.s. population…
The projected U.S. population in 2040 is \(371.65\) million people.
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a data set about speed dating includes \like\ ratings of male dates mad…
B. \(H_0:\mu = 7.00\), \(H_1:\mu<7.00\) Test statistic \(t\approx - 3.45\) P - value \(\approx0.0003\) Final conclusion: Reject \(H_0\). There is sufficient evidence to support th…
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in a newspapers survey of 489 people, 52.1% said that we should replace…
The null hypothesis is \(H_0:p = 0.5\). We fail to reject the null hypothesis.
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listed below are the lead concentrations (in μg/g) measured in differen…
$-1.46$
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in a newspapers survey of 489 people, 52.1% said that we should replace…
\(0.342\)
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in a newspapers survey of 489 people, 52.1% said that we should replace…
a. two - tailed b. \(z = 0.95\)
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listed below are the lead concentrations (in μg/g) measured in differen…
\(H_0:\mu = 14.0\) \(H_1:\mu<14.0\)
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practice and problem solve: darren collects data on the u.s. population…
The projected U.S. population for 2040 is \(371.65\) million people.
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newspapers survey of 489 people, 52.1% said that we should replace pass…
Two - tailed
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assume that a simple random sample has been selected from a normally di…
\(t\approx - 3.647\)
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a scatterplot has a negative, linear correlation. which statement is tr…
As the \(x\)-values increase, the \(y\)-values tend to decrease.
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a certain drug is used to treat asthma. in a clinical trial of the drug…
D. There is not sufficient evidence to support the claim that less than 8% of treated subjects experienced headaches.
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a certain drug is used to treat asthma. in a clinical trial of the drug…
A. Fail to reject the null hypothesis because the \(P -\)value is greater than the significance level, \(\alpha\).
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a certain drug is used to treat asthma. in a clinical trial of the drug…
C. \(H_0: p = 0.08\)
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joseph claims that a scatterplot in which the y - values increase as th…
Amy is correct because a nonlinear association could increase along the whole data set, while being steeper in some parts than others. The scatterplot could be linear or nonlinear.
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assume that a simple random sample has been selected from a normally di…
\(t\approx - 2.965\)
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a certain drug is used to treat asthma. in a clinical trial of the drug…
\(P - value=0.672\)
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question 17 2 pts read the analogy. wheel: bike :: catalytic converter:…
Question 17: It is part of the car. Question 18: Its meaning is the opposite of ignorance.
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a certain drug is used to treat asthma. in a clinical trial of the drug…
\(z = 0.45\)
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assume that a simple random sample has been selected from a normally di…
D. \(H_0:\mu = 1000\) hic, \(H_1:\mu < 1000\) hic
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which statement is true regarding the traits of scatterplots? the stren…
The first option: "The strength of a correlation is independent of whether the correlation of a scatterplot is positive or negative. A scatterplot with positive correlation can ha…
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which statement it true regarding their claims? adele is correct becaus…
Monte is correct because in both scatterplots, the \(y\) values decrease as the \(x\) values increase so both have a negative correlation.
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question 15 which statement best identifies the relationship between th…
Question 15: They are antonyms; their meanings are the exact opposite of each other. Question 16: It is a kind of rock.
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which of the following is not a requirement for testing a claim about a…
B. The sample mean, \(\bar{x}\) is greater than 30.
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question 13 2 pts which statement best identifies the relationship betw…
Question 13: They are synonyms; their meanings are nearly the same. Question 14: They are antonyms; their meanings are the exact opposite of each other.
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there is a positive correlation in the data set. there is a negative co…
There is a negative correlation in the data set.
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use the results from a survey of a simple random sample of 1024 adults.…
\(p = 0.7\)
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thirty - four different video games showing drug use were observed. the…
A. The number of degrees of freedom The value of \(df\) is \(33\)
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read this excerpt from \cali ne.\the engine screeched, it sent a few la…
B. carrying its passengers along
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there is a positive correlation in the data set. there is a negative co…
There is a negative correlation in the data set.
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use the results from a survey of a simple random sample of 1024 adults.…
$\hat{p} = 0.79$
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6 5 4 3 2 1 0 0 1 2 3 4 5 6 x there is a positive correlation in the da…
There is no correlation in the data set.
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use the results from a survey of a simple random sample of 1024 adults.…
\(809\)
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thirty - four different video games showing drug use were observed. the…
A. The number of degrees of freedom
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twelve different video games showing alcohol use were observed. the dur…
C. No. The sample size is not greater than 30, the sample does not appear to be from a normally distributed population, and there is not enough information given to determine whet…
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twelve different video games showing alcohol use were observed. the dur…
A. The sample observations must be a simple random sample; D. Either the population is normally distributed, or \(n>30\), or both.
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which of the following is not a characteristic of the t test? choose th…
B. The Student t distribution has a mean of \(t = 0\) and a standard deviation of \(s = 1\)
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read this excerpt from chapter 41 of moby - dick using comprehension st…
Though Ahab is physically weakened, his will for revenge has strengthened him.
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which of the following is not a requirement for testing a claim about a…
A. The population mean, \(\mu\), is equal to 1.
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use the wording of final conclusion flow chart interactive to answer th…
B. There is sufficient evidence to support the claim that the mean weight of African elephants is greater than 2000 kg.
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carlo stopped to rest for a minute and tried to catch his breath. hed b…
Meiya and Carlo are good friends and can tease each other.
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use the hypothesis testing: identify null and alternative hypotheses fl…
B. \(\mu> 0.002\)
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read the passage from \the tell-tale heart\:...i could see nothing else…
The eye, which the speaker hates, becomes separate and distinct from the man himself, whom the speaker says he loves.
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read this excerpt from chapter 2 of the scarlet letter using comprehens…
wickedness, sin
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the test statistic of ( z = 1.33 ) is obtained when testing the claim t…
a. Two - tailed b. \(0.1836\) c. Fail to reject \(H_0\)
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claim: the standard deviation of pulse rates of adult males is less tha…
a. \(\sigma < 10\) bpm b. \(H_0:\sigma = 10\) bpm, \(H_1:\sigma<10\) bpm
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claim: the standard deviation of pulse rates of adult males is less tha…
\(\sigma < 10\)
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claim: more than 3.6% of homes have only a landline telephone and no wi…
\( p>0.036 \)
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the test statistic of ( z = 1.26 ) is obtained when testing the claim t…
a. This is a two - tailed test. b. The \(P - value\) is \(0.2076\). c. We should fail to reject \(H_0\).
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the test statistic of ( z = 0.90 ) is obtained when testing the claim t…
a. This is a right - tailed test. b. The P - value is \(0.1841\). c. We fail to reject \(H_0\).
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an article in a journal reports that 34% of american fathers take no re…
C. 0.0019
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use the given information to find the p - value. also, use a 0.05 signi…
A. 0.0901; fail to reject the null hypothesis
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suppose we want to test the claim that the majority of adults are in fa…
A. Right - tailed
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which of the following is a requirement for testing a claim about a pop…
A. The conditions \(np\geq5\) and \(nq\geq5\) are both satisfied.
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fill in the blank. the ______ is the probability of getting a test stat…
D. p - value
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suppose 209 subjects are treated with a drug that is used to treat pain…
A. Fail to reject $H_0$. There is not sufficient evidence to warrant support of the claim that more than 20% of users develop nausea.