Estadística
Análisis de datos, distribuciones de probabilidad y pruebas de hipótesis.
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a bag of marbles has 5 blue marbles, 3 red marbles, and 6 yellow marble…
14
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use the given probability of each event to find the probability of the …
\(P(\text{green})=\frac{1}{3}\), \(P(\text{not red})=\frac{3}{4}\)
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pre-algebra ic sem 2 fall 2025 understanding probability determining th…
The probability of drawing a red marble is \(\frac{2}{5}\), and the probability of the complement (not drawing a red marble) is \(\frac{3}{5}\)
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identify possible and impossible events determine whether each event is…
Possible: Rolling an even number, Rolling a number less than 7, Rolling a 1 Impossible: Rolling a number greater than 10, Rolling an 8
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marcus has a spinner with 3 red sections, 2 blue sections, and 1 purple…
\(P(\text{lands on red})=\frac{1}{2}\), \(P(\text{lands on blue})=\frac{1}{3}\), \(P(\text{lands on purple})=\frac{1}{6}\)
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pre - algebra ic sem 2 fall 2025 understanding probability determining …
\(\frac{2}{5}\)
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determining probability you have a bag with 4 red marbles, 3 green marb…
Purple.
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a bag contains 4 red marbles, 2 blue marbles, 1 purple marble, and 3 gr…
\(10\)
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answer attempt 1 out of 2 the scatter plot shows negative linear associ…
negative linear association because as the plotted values of \(x\) increase, the values of \(y\) generally decrease.
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for parts (a) and (b) below, choose the correct description. (a) a loca…
(a) It appears to take the same amount of time to serve each customer. (b) Predicted number of points for spending $\$10$: $80$
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defining \subject\ which of the following is the correct definition of …
A. A subject in a sentence is ½ of what makes a sentence complete; it is the main noun in the sentence.
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a researcher studied the relationship between the number of times a cer…
\(70\) degrees Fahrenheit
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a researcher studied the relationship between the number of times a cer…
\(70\) degrees Fahrenheit
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dylan has a part - time job at an ice skating rink selling hot cocoa. h…
92
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an economic theory that stresses government management of the productio…
socialism
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analyze theme remember that the theme of a poem or a story is the most …
The main theme of David Baraza’s poem “A Place Without Shame” is that people who may initially feel like they don’t fit into the larger society can overcome this by embracing and …
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a researcher studied the relationship between the number of times a cer…
\(67\) degrees Fahrenheit
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in terms of production, what best describes the difference between capi…
Capitalism is a system in which goods are made by private businesses, but socialism stresses government control over production.
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read the excerpt from harrison bergeron \i think id make a good handica…
B. It depicts her as a flat character because she represents the stereotype of average intelligence.
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my assignments winchel: i know so that your ymca... does all it can to …
C. Prisoners began to push Nazi symbols and violence.
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5. matt sometimes orders expensive electronics online from small websit…
5. Because a low - probability risk can still be serious and costly 6. PPO
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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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1. maya is deciding whether to bike to school or take the bus. she know…
1. probability of the risk 2. property risk
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find the value of the test statistic z using ( z = \frac{hat{p} - p}{sq…
B. \(3.06\)
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in wicked, green skin becomes a symbol of how others judge elphaba unfa…
Symbolism used to develop character and theme
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in the wizard of oz, dorothys journey ends with her returning home; in …
Wicked’s darker tone makes us question what “happy endings” mean.
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\cunning\ means= clever or sly in achieving ones goals lazy and unmotiv…
clever or sly in achieving one's goals
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a random sample of 859 births included 426 boys. use a 0.01 significanc…
The test statistic for this hypothesis test is $-0.58$. The P - value for this hypothesis test is $0.562$. For the conclusion: Since the P - value ($0.562$) $>0.01$ (significance …
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a random sample of 859 births included 426 boys. use a 0.01 significanc…
D. \(H_0:p = 0.506\), \(H_1:p eq0.506\)
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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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to \hasten\ means- to move or act quickly to wait or delay to rest or p…
To move or act quickly
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suppose 236 subjects are treated with a drug that is used to treat pain…
The test statistic for the hypothesis test is $1.11$. The P - value for the hypothesis test is $0.134$. If we assume a significance level (say $\alpha = 0.05$), since $P - value=0…
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(a) what were the ranges of wait times for the two restaurants? first r…
(a) First restaurant: \(10\) minutes, Second restaurant: \(22\) minutes; (b) First restaurant; (c) Second restaurant
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suppose 235 subjects are treated with a drug that is used to treat pain…
A. \(H_0:p = 0.20\), \(H_1:p>0.20\)
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suppose we want to test the claim that the majority of adults are in fa…
B. Right - tailed
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think for yourself. ignorance is not an excuse for doing wrong. good fo…
1. Ignorance is not an excuse for doing wrong. 2. Think for yourself. 3. Good fortune comes to those who are kind.
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a random sample of 857 births included 427 boys. use a 0.01 significanc…
A. The results do not support the belief that 51.1% of newborn babies are boys; the results merely show that there is not strong evidence against the rate of 51.1%.
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the stem - and - leaf plot below gives the number of minutes that custo…
# Explanation: ## Step1: Find the range for each restaurant For the first restaurant: The minimum value is \(7\) (from the stem - and - leaf plot: the first row of the first resta…
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a random sample of 857 births included 427 boys. use a 0.01 significanc…
D. Fail to reject $H_0$. There is not sufficient evidence to warrant rejection of the claim that $51.1\%$ of newborn babies are boys.
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a random sample of 857 births included 427 boys. use a 0.01 significanc…
The P - value for this hypothesis test is \(0.447\)
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read the excerpt from daniels comparative essay. (1) despite the many f…
It focuses on one main character and one main plot event.
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a random sample of 857 births included 427 boys. use a 0.01 significanc…
The test statistic for this hypothesis test is $-0.76$.
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read the excerpt from daniels comparative essay. (1) despite the many f…
# Brief Explanations: La oración original "It's[SSE Completed, Client Connection Error][SSE Completed, Client Connection Error][LLM SSE On Failure]
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a random sample of 857 births included 427 boys. use a 0.01 significanc…
D. \(H_0:p = 0.511\), \(H_1:p eq0.511\)
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drag the right word to the word that means the opposite softness formul…
Drag hardness to softness.
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what is indifference? etymologically, the word means o difference.\ a s…
Mr. Wiesel says indifference is tempting and seductive because it is easier to look away from victims, avoid interruptions to one's work, dreams, and hopes, and avoid being involv…
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a random sample of 857 births included 427 boys. use a 0.01 significanc…
D. \(H_0:p = 0.511\), \(H_1:p eq0.511\)
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trials in an experiment with a polygraph include 96 results that includ…
E. \(H_0:p = 0.80\), \(H_1:p<0.80\) (for the hypothesis part). Test statistic \(z\approx - 0.716\), \(P - value\approx0.236\). Fail to reject \(H_0\). There is not sufficient evid…
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trials in an experiment with a polygraph include 96 results that includ…
The null hypothesis \(H_0:p = 0.80\) and the alternative hypothesis \(H_1:p < 0.80\) (corresponds to option E). The test statistic \(z\approx - 0.716\), the P - value\(\approx0.23…
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a genetic experiment involving peas yielded one sample of offspring con…
A. \(H_0:p = 0.25\), \(H_1:p eq0.25\)
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in a study of cell phone usage and brain hemispheric dominance, an inte…
The P - value is \(0.032\)
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in a study of cell phone usage and brain hemispheric dominance, an inte…
The test statistic $z\approx - 1.94$
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a certain drug is used to treat asthma. in a clinical trial of the drug…
- For identifying the null hypothesis: D. \(H_0:p = 0.12\) - For the decision: Reject the null hypothesis \(H_0:p = 0.12\) because the \(p - value(0.001045950)\) is less than the …
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which point on the coordinate plane represents the price of 10 pizzas?
C
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a certain drug is used to treat asthma. in a clinical trial of the drug…
a. Left - tailed test b. \(z=-3.09\) c. \(P - value = 0.0010\)
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in a study of cell phone usage and brain hemispheric dominance, an inte…
The null hypothesis \(H_0:p = 0.2\) and the alternative hypothesis \(H_1:p<0.2\) (corresponding to option D). The test statistic \(z\approx3.90\)
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which of the following is not a true statement about error in hypothesi…
B. A type I error is making the mistake of rejecting the null hypothesis when it is actually false.
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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 distribution of military and economic power that prevents any one nat…
balance of power
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bella is making apple - celery juice from 15 celery sticks. if bella us…
10 apples
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carl is making apple - celery juice from 8 celery sticks. if carl uses …
6
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a poll of 1019 americans showed that 47.4% of the respondents prefer to…
Fail to reject the null hypothesis. There is not sufficient evidence to support the claim that fewer than half of Americans prefer to watch the news rather than read or listen to …
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6. the following data shows the world record times for the 200 meter ra…
The predicted record time in 1988 is approximately \(7.2\) seconds.
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suppose 241 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.
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a poll of 1010 americans showed that 47.4% of the respondents prefer to…
\(0.049\)
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5. the table below gives the height (in inches) and shoe sizes of six r…
\(72\) inches
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a data set about speed dating includes \like\ ratings of male dates mad…
- Hypotheses: \(H_0:\mu = 7.00\), \(H_1:\mu<7.00\) (Option A) - Test statistic: \(-3.68\) - P - value: \(0.000\) - Conclusion: Reject \(H_0\). There is sufficient evidence to conc…
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a poll of 1019 americans showed that 47.4% of the respondents prefer to…
$z\approx - 1.66$
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suppose 241 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: \(0.93\) - P - value: \(0.18\) (rounded to two decimal places)
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4. the table below shows the lengths (in inches) and corresponding weig…
\(171.25\) pounds
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a poll of 1019 americans showed that 47.4% of the respondents prefer to…
\(H_0:p = 0.5\) \(H_1:p<0.5\)
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3. the table below gives the number of hours spent studying for a scien…
100
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2. a student who waits on tables at a restaurant recorded the cost of m…
The waiter should expect to receive approximately $\$1.29$
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suppose that in a random selection of 100 colored candies, 30% of them …
D. 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 \(24\%\)
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suppose that in a random selection of 100 colored candies, 30% of them …
C. Reject $H_0$. There is sufficient evidence to warrant rejection of the claim that the percentage of blue candies is equal to 24%
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suppose 232 subjects are treated with a drug that is used to treat pain…
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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thirty - six different video games showing alcohol use were observed. t…
D. The number of degrees of freedom The value of \(df\) is \(35\)
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suppose that in a random selection of 100 colored candles, 30% of them …
\(0.159\)
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a study was done using a treatment group and a placebo group. the resul…
D. Fail to reject the null hypothesis. There is not sufficient evidence to warrant rejection of the claim that the two samples are from populations with the same mean.
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read the excerpt from enriques journey. moreover, the mara salvatrucha …
- C. It indicates that the gangsters are looking for vulnerable people. - E. It supports the idea that the gangsters are involved in criminal activities.
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suppose that in a random selection of 100 colored candies, 30% of them …
$1.41$
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suppose that in a random selection of 100 colored candies, 30% of them …
D. \(H_0:p = 0.24\), \(H_1:p eq0.24\)
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suppose 232 subjects are treated with a drug that is used to treat pain…
The null hypothesis \(H_0: p = 0.20\) and the alternative hypothesis \(H_1: p>0.20\) (corresponding to option B). The test - statistic \(z\approx0.76\)
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a television show conducted an experiment to study what happens when bu…
Fail to reject the null hypothesis. There is not sufficient evidence to reject the claim that buttered toast will land with the buttered side down 50% of the time. There is not su…
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fill in the blank. the p - value is the probability of getting a test s…
D. the null hypothesis is true
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use the results from a survey of a simple random sample of 1064 adults.…
a. \(894\) b. \(\hat{p}=0.84\) c. \(p = 0.80\)
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a television show conducted an experiment to study what happens when bu…
$z\approx - 0.44$
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determine whether the samples are independent or dependent. a data set …
D. The samples are dependent because there is a natural pairing between the two samples.
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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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fill in the blank. the p - value is the probability of getting a test s…
C. the null hypothesis is true
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5. a movie theater offers a reward program that charges a yearly member…
The rate of change is \(5\) (meaning each movie ticket costs \(5\) dollars more in total cost when considering the membership) and the initial value is \(15\) (the cost of the yea…
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in a newspapers survey of 491 people, 53.2% 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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use the results from a survey of a simple random sample of 1166 adults.…
a. \(956\) b. \(\hat{p}=0.82\) c. \(p = 0.85\)
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in a newspapers survey of 491 people, 53.2% said that we should replace…
\(0.162\) (rounded to three decimal places as \(0.1618\approx0.162\))
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in a newspapers survey of 491 people, 53.2% said that we should replace…
\(z = 1.40\) (rounded to two decimal places from the given \(z = 1.3990\))
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in a newspapers survey of 491 people, 53.2% said that we should replace…
two - tailed
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claim: fewer than 8.2% of homes have only a landline telephone and no w…
a. \(p < 0.082\) b. \(H_0:p = 0.082\), \(H_1:p < 0.082\)
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4. a roller skating rink charges a skate rental fee and an hourly rate …
The rate of change (slope) is \(3\) (meaning it costs \( \$3\) per hour to skate after paying the rental fee) and the initial value (y - intercept) is \(3.50\) (the skate rental f…
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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. For the second part: If we assume that a norma…
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claim: fewer than 10.2% of homes have only a landline telephone and no …
a. \(p<0.102\) b. \(H_0:p = 0.102\), \(H_1:p < 0.102\)