Statistiques
Analyse de données, distributions de probabilités et tests d'hypothèses.
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assume that a simple random sample has been selected from a normally di…
B. \(H_0:\mu = 1000\) hic, \(H_1:\mu < 1000\) hic
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question 5 mezzo (m) means ______ in english. medium loud very
medium
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which best describes the strength of a model with an r - value of 0.29?…
a weak positive correlation
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a data set includes data from student evaluations of courses. the summa…
Reject \(H_0\). There is sufficient evidence to conclude that the mean of the population of student course evaluations is not equal to \(3.75\) (the original claim that \(\mu = 3.…
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during a sale all items are discounted by 50%. you arrive at the store …
a. No b. \(33.6\)
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a data set includes data from student evaluations of courses. the summa…
The test statistic is approximately \(-2.35\)
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a data set includes data from student evaluations of courses. the summa…
C. \(H_0:\mu = 3.75\), \(H_1:\mu eq3.75\)
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a random sample of 30 college students is selected. each student is ask…
| Hours Studied | Freq. | |----|----| | \(15\) | \(0\) | | \(16\) | \(3\) | | \(17\) | \(5\) | | \(18\) | \(3\) | | \(19\) | \(5\) | | \(20\) | \(4\) | | \(21\) | \(2\) | | \(22\)…
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which r - value represents the weakest correlation? - 0.75 - 0.27 0.11 …
\(0.11\) (the option with \(r = 0.11\))
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multiple - choice question take notes on this: ***as we analyze the non…
The Supply Curve would shift LEFT as the supply of strawberries goes DOWN in winter.
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which r - value represents the most moderate correlation? -0.92 -0.18 0…
\(0.56\)
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1 trouvez des paires list pairs of words that are related in meaning. d…
1. - 1. l'enfance, la vieillesse - 2. un gâteau, un biscuit - 3. un hôte, des invités - 4. l'adolescence, l'âge adulte - 5. marié(e), célibataire - 6. la mort, la vie 2. - 1. Logi…
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the table shows the shipping costs for items of different values. which…
a weak positive correlation
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which r - value represents the strongest correlation? -0.83 -0.67 0.48 …
\(-0.83\)
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the number of grams of zero - calorie sodium in a restaurant meal is co…
It is a strong positive correlation, and it is not likely causal.
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what is the correlation coefficient for the data shown in the table? 1 …
-1
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read the excerpt from the charter of 1732 and answer the question. why …
A. it allowed Oglethorpe and other trustees to establish the colony of Georgia
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what is the correlation coefficient for the data shown in the table? 0 …
1
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a student wondered if more than 10% of students enrolled in an introduc…
A. He claims that more than 10% of students in the introductory Chemistry class dropped before the midterm when, in fact, 10% (or less) actually dropped.
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read the excerpt from the charter of 1732 and answer the question. how …
A. they could "gain a comfortable subsistence for themselves and families"
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consider a sample of 53 football games, where 28 of them were won by th…
D. Fail to reject \(H_0\). There is not sufficient evidence to support the claim that the probability of the home team winning is greater than one - half.
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read the excerpt from the charter of 1732 and answer the question. from…
A. King George on behalf of Great Britain
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consider a sample of 53 football games, where 28 of them were won by th…
The P - value for this hypothesis test is $0.341$.
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consider a sample of 53 football games, where 28 of them were won by th…
The test statistic for this hypothesis test is $0.41$
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find the expected value (μ) of the random variable with the given proba…
$2.9$
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consider a sample of 53 football games, where 28 of them were won by th…
A. \(H_0:p = 0.5\), \(H_1:p>0.5\)
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the table below gives the probability density of trees in a particular …
\( 0.45 \)
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the table below gives the probability density of grades for a particula…
\(0.42\)
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trials in an experiment with a polygraph include 96 results that includ…
Fail to reject \(H_{0}\). There is not sufficient evidence to support the claim that the polygraph results are correct less than 80% of the time.
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use the frequency table to compute the following. probability of living…
\(P(A)=\frac{30}{91}\), \(P(B)=\frac{4}{13}\), \(P(A\cap B) = 0\)
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the table shows the number of calories in four meals and the cost of ea…
a weak positive correlation
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trials in an experiment with a polygraph include 96 results that includ…
The P - value is $0.111$
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the table shows the number of flowers in four bouquets and the total co…
\(0.28\)
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trials in an experiment with a polygraph include 96 results that includ…
The test statistic \(z\approx - 1.22\)
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trials in an experiment with a polygraph include 96 results that includ…
A. \(H_0:p = 0.80\), \(H_1:p<0.80\)
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rows represent the ratings students gave to the food. columns represent…
\( P(B)=\frac{5}{12}\), \( P(A\cap B)=0\), \( P(A\cup B)=\frac{37}{60}\)
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a random sample of 836 births included 430 boys. use a 0.05 significanc…
For the hypothesis test conclusion: C. Fail to reject $H_0$. There is not sufficient evidence to warrant rejection of the claim that 50.5% of newborn babies are boys. For whether …
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for a brand, the life of light bulbs (b) are normally distributed with …
\( 81.5\% \)
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a random sample of 836 births included 430 boys. use a 0.05 significanc…
C. Fail to reject \(H_0\). There is not sufficient evidence to warrant rejection of the claim that \(50.5\%\) of newborn babies are boys.
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a random sample of 836 births included 430 boys. use a 0.05 significanc…
The P - value for this hypothesis test is \(0.603\)
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a random sample of 836 births included 430 boys. use a 0.05 significanc…
The test statistic for this hypothesis test is $0.52$
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a random sample of 830 births included 430 boys. use a 0.01 significanc…
The correct null and alternative hypotheses are \(H_0:p = 0.505\) and \(H_1:p eq0.505\) (Option A). The test statistic for this hypothesis test is approximately \(z = 0.75\)
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7) the height and weight of several adults were recorded: it was discov…
### a) The slope of the line represents the increase in weight (in pounds) for each 1 - foot increase in height. ### b) The \(y\) - intercept represents the predicted weight (in p…
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find the probability of exactly 6 successes in 7 trials of a binomial e…
\(36.7\%\)
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a random sample of 836 births included 430 boys. use a 0.05 significanc…
A. $H_{0}:p = 0.505$, $H_{1}:p eq0.505$; The test statistic for this hypothesis test is $-0.53$
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a random sample of 836 births included 430 boys. use a 0.05 significanc…
A. \(H_0:p = 0.505\), \(H_1:p eq0.505\)
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2. a survey of 866 voters in one state reveals that 47.1% of them favor…
\((0.471\pm0.033)\)
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suppose 220 subjects are treated with a drug that is used to treat pain…
D. Reject \(H_0\). There is sufficient evidence to warrant support of the claim that more than 20% of users develop nausea.
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question 25 of 25 a set of data points has a line of best fit of ( y=-0…
D. \(0.3\)
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7) the height and weight of several adults were recorded: it was discov…
a) For every 1 - foot increase in height, the weight increases by 46.6 pounds. b) Mathematically, it is the weight when height is 0 (not physically meaningful for adult height in …
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suppose 220 subjects are treated with a drug that is used to treat pain…
The \(P\) - value for this hypothesis test is \(0.046\)
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suppose 220 subjects are treated with a drug that is used to treat pain…
The test statistic for this hypothesis test is $1.69$
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question 17 of 25 which of these r - values represents the weakest corr…
D. - 0.15
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suppose 220 subjects are treated with a drug that is used to treat pain…
C. \(H_0: p = 0.20\), \(H_1: p>0.20\)
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question 16 of 20 suppose the linear regression line ( y = 2.1x + 130 )…
C. $323$
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frequency tables, probability, and independent events the two - way fre…
\( P(\text{maple})=\frac{1}{3} \) \( P(1\times2)=\frac{1}{5} \) \( P(\text{maple and }1\times2)=\frac{1}{15} \)
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if age is an explanatory variable and height is the corresponding respo…
D. Height
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suppose that you have seen the results of a poll stating that 54% of ch…
\(382\)
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a certain drug is used to treat asthma. in a clinical trial of the drug…
- For the null hypothesis: C. \(H_0:p = 0.12\) - For the decision about the null hypothesis: B. Reject the null hypothesis because the P - value is less than or equal to the signi…
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estimate the line of best fit using two points on the line. a. ( y = - …
D. \(y = 8x+20\)
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question 9 of 25 which of the following is not a possible r - value? a.…
B. -1.3
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which of the following is a requirement for testing a claim about a pop…
C. The conditions \(np\geq5\) and \(nq\geq5\) are both satisfied.
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suppose there is a strong positive correlation between a and b. which o…
D. When a increases, b tends to increase.
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73. why is a homeowners insurance policy considered a package policy? ○…
- 73. A. It combines two or more separate coverages in a single policy. - 74. C. the insurance company
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6.4.3 test (cst): data and mathematical modeling what is the equation o…
D. \(y = 1.560x-4.105\)
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identify the type i error and the type ii error that correspond to the …
- **Type I error**: D. Reject the null hypothesis that the percentage of adults who retire at age 65 is equal to 62% when that percentage is actually equal to 62%. - **Type II err…
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4.3 test (cs): data and mathematical modeling he resale value of a cert…
C. \(\$5500\)
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fill in the blank. a______error is the mistake of rejecting the null hy…
A. Type I
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fill in the blank. a type i error is the mistake of ______ when it is a…
A. rejecting the null hypothesis
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to find the theme of \the pursuit of happiness,\ the reader should stud…
locate the message that the poem conveys to the reader.
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the test statistic of ( z = 2.20 ) is obtained when testing the claim t…
a. This is a two - tailed test. b. The P - value is \(0.0278\). c. We should fail to reject \(H_0\).
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the test statistic of ( z = 1.40 ) is obtained when testing the claim t…
a. This is a right - tailed test. b. The P - value is \(0.0808\). c. We fail to reject \(H_0\).
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what is the term meaning payment in lieu of performing military service…
commutation
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use the given information to find the p - value. also, use a 0.05 signi…
D. \(0.3015\), fail to reject the null hypothesis
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by visual inspection, determine the best - fitting regression model for…
B. Exponential
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assume a significance level of \\( \\alpha = 0.1 \\) and use the given …
a. D. Fail to reject \(H_0\) because the P - value is greater than \(\alpha\) b. A. There is not sufficient evidence to support the claim that the standard deviation of pulse rate…
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question 2 of 25 which of the following r - values represents the stron…
D. \(0.75\)
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watch the video and answer the question listed below. what on earth was…
B. If the P - value (the nut) is less than alpha (the apple), reject the null hypothesis.
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a certain polling agency asked 259 adult men the question: \if there wa…
\(5.3\)
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which of the following is not true about p - values in hypothesis testi…
D. The P - value separates the critical region from the values that do not lead to rejection of the null hypothesis
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fill in the blank the ______ is the probability of getting a test stati…
B. p - value
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find the value of the test statistic z using ( z=\frac{hat{p}-p}{sqrt{\…
C. 3.05
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express the null hypothesis and the alternative hypothesis in symbolic …
A. \(H_0:\mu = 48^{\circ}F\), \(H_1:\mu eq48^{\circ}F\)
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using this model, the predicted rainfall for month 11 is about -32.4 ce…
C. No, because you can't have a negative amount of rainfall.
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a formal hypothesis test is to be conducted using the claim that the me…
B. \(H_0:\mu = 98.6^{\circ}F\)
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by visual inspection, determine the best fitting regression model for t…
C. Quadratic
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express the null hypothesis and the alternative hypothesis in symbolic …
A. \(H_0:p = 0.0016\), \(H_1:p<0.0016\)
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fill in the blank. typically, the idea of the ______ hypothesis is that…
null
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fill in the blank. the hypothesis is a statement that the value of a po…
null hypothesis
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6.3.3 quiz: nonlinear models what is the quadratic regression equation …
A. \(y = 2.38x^{2}+0.90x + 9.90\)
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a survey was conducted to find if modern young people want to have many…
\(4.6\)
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one day, a poll appeared on a certain website. it asked \do you believe…
\(4.1\)
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what is the quadratic regression equation that fits these data? a. ( y …
A. \(y = 1.62x^{2}+2.30x+9.20\)
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6.3.3 quiz: nonlinear models the quadratic regression equation that mod…
B. \(17.14\) million
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one day, a poll appeared on a certain website. it asked do you believe …
\(4.3\)
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the two - way frequency table shows the number of students from each gr…
The value for Sophomores attending is approximately \( 0.161 \), for Juniors attending is approximately \( 0.144 \), for Seniors not - attending is approximately \( 0.034 \), the …
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6.3.3 quiz: nonlinear models what is the exponential regression equatio…
A. \(y = 4.89\cdot1.47^{x}\)
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a frequency table shows the number of students from who plan to attend …
Freshmen represent approximately \(27\%\) of the students attending the home - coming game. \(69\%\) of the juniors are attending the home - coming game.
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question 9 of 10 a data set consists of the following data points: (3,5…
C. 4.5
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read the excerpt from hapsody on a windy night.\the lamp hummed: egard …
B. Each night is new; previous events do not matter.