Statistiques
Analyse de données, distributions de probabilités et tests d'hypothèses.
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parent results not recorded, continue practicing or switch user. a comp…
5600
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quarters are currently minted with weights normally distributed and hav…
11.643 (Let's recalculate properly to confirm. The formula for the chi - square test statistic for a test of a single variance is \(\chi^{2}=\frac{(n - 1)s^{2}}{\sigma^{2}}\), whe…
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parent results not recorded. continue practising or switch user. last t…
180
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what is the center point of a data set when all of the values are liste…
B. the median
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quarters are currently minted with weights normally distributed and hav…
16.151
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parent results not recorded. continue practising or switch user. the st…
30000
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what is the average of all data points in a data set? ○ the mean ○ the …
A. the mean
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present results not recorded. continue practising or switch user. ednas…
14
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quarters are currently minted with weights normally distributed and hav…
11.459
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parent results not recorded. continue practising or switch user. dirks …
7
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on thursday, abram asked several students to name their favorite class.…
A. \(\frac{41}{50}\)
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a bakery offers 6 types of cookies. if a customer wants to buy a box of…
15
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quarters are currently minted with weights normally distributed and hav…
A
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parent results not recorded. continue practising or switch user. at har…
50
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at an ice cream shop, customers can choose 3 flavors from 8 available f…
56
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a track team has 10 runners, but only 3 can participate in a relay race…
720
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how many 3-letter \words\ (including nonsense words) can be formed usin…
60
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parent results not recorded. continue practising or switch user. the ci…
24
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parent results not recorded. continue practising or switch user. a biol…
35
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quarters are currently minted with weights normally distributed and hav…
C. \( H_0: \sigma \geq 0.066 \); \( H_a: \sigma < 0.066 \) (Claim)
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quarters are currently minted with weights normally distributed and hav…
C. \( H_0: \sigma \geq 0.066 \); \( H_a: \sigma < 0.066 \) (Claim)
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a bakery offers cupcakes with 3 flavors of cake and 3 types of frosting…
9
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parent results not recorded. continue practising or switch user. tammy …
1
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a school offers 4 history classes, 3 art classes, and 3 gym classes. if…
36
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parent results not recorded. continue practising or switch user. in hop…
36
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use the spinner shown. it is equally probable that the pointer will lan…
$\frac{1}{18}$
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a snack food manufacturer estimates that the variance of the number of …
Fail to reject \( H_0 \). There is not enough evidence to at the 10% level of significance to reject the manufacturer’s claim that the variance of the number of grams of carbohydr…
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when it is alexis turn, she is well prepared to convince the judges tha…
C. The computer needs to be up to date enough to be able to download the software properly
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enter the correct answer. a bag contains 12 marbles: 7 yellow, 5 green.…
$\frac{5}{33}$
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what is the difference between the highest and lowest points in a data …
D. the range
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a basket has 9 fruits: 3 apples, 6 oranges. 1 fruit is randomly drawn a…
$\frac{1}{4}$
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this pie chart shows statistics related to the worlds population. distr…
B. showing how parts make up a whole.
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enter the correct answer. a jar has 8 jellybeans: 5 red, 3 green. if 1 …
$\frac{15}{64}$
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a snack food manufacturer estimates that the variance of the number of …
B. The rejection regions are $\chi^{2} < 13.09$ and $\chi^{2} > 35.17$.
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identifying the stronger association golf $y = -0.67x + 2.30$ basketbal…
Golf because the data points are closer to the trend line.
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a box has 7 candies: 4 chocolate and 3 mint. if 1 candy is drawn, repla…
$\frac{12}{49}$
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a snack food manufacturer estimates that the variance of the number of …
13.09, 35.17
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which graph could you use to make the most accurate prediction? three s…
The third graph (the one on the right)
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a snack food manufacturer estimates that the variance of the number of …
D. \( H_0: \sigma^2 = 1.14 \) (Claim) \( H_a: \sigma^2 eq 1.14 \)
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in an experiment, a spinner with 5 equal sections (numbered 1 to 5) is …
Independent
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in an experiment, a six - sided die is rolled and then a spinner with 4…
Independent
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parent results not recorded. continue practising or switch user. which …
$\frac{11}{20} \times 80$ (the second option)
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the data in this table was gathered in a survey on students study locat…
34%
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the table provided below shows paired data for the heights of a certain…
The left - most graph (the first graph among the three options)
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parent results not recorded. continue practising or switch user. which …
$\boldsymbol{\frac{1}{5} \times 50}$ (the first option)
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test the claim about the population variance $\\sigma^2$ at the level o…
Fail to reject \( H_0 \); is not; support
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the data in this table was gathered in a survey on students transportat…
40%
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in a class of 45 students, 25 are democrats, 10 are business majors, an…
$\frac{32}{45}$
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at a science fair, 45% of the projects are biology-related. if 80 proje…
36
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which is the most accurate way to estimate 31% of 700? options: 4/5 × 7…
The option with $\frac{3}{10} \times 710$ (identify by its fraction $\frac{3}{10}$ and multiplier 710, e.g., the second option if ordered as A:$\frac{4}{5}×710$, B:$\frac{3}{10}×7…
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a movie theater offers a promotion where 20% of ticket stubs are random…
70
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twenty different statistics students are randomly selected. for each of…
D. No, because while there is no linear correlation, there may be a relationship that is not linear.
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a bowl contains 9 buttons. 2 of them are blue. if one is randomly drawn…
$\frac{2}{9}$
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role playing, self - discussing, and stating striking facts or statisti…
True
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parent results not recorded. continue practising or switch user. which …
$\frac{1}{5} \times 30$ (the fourth option)
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a bowl contains 12 beads. 4 of them are blue. if one is randomly drawn,…
$\frac{1}{3}$
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for a data set of brain volumes (cm³) and iq scores of nine males, the …
Since the correlation coefficient \( r = 0.647 \) is between \( -0.666 \) and \( 0.666 \) (or \( 0.647 < 0.666 \) and \( 0.647 > - 0.666 \)), there is not sufficient evidence to s…
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Question was provided via image upload.
positive
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for a data set of brain volumes (cm³) and iq scores of nine males, the …
-0.666, 0.666
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communication, broadly defined, is multiple choice the use of messages …
the process of using messages to generate meaning (the last option in the multiple - choice list)
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parent results not recorded. continue practising or switch user. which …
$\frac{2}{3} \times 51$ (the second option)
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test the claim about the population variance $\\sigma^2$ at the level o…
$0.470$
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parent results not recorded. continue practising or switch user. which …
$\frac{3}{4}×32$ (the fourth option, $\boldsymbol{\frac{3}{4}×32}$)
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parent results not recorded. continue practising or switch unit: which …
$\boldsymbol{\frac{1}{4} \times 48}$ (the second option, $\frac{1}{4} \times 48$)
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match these values of r with the accompanying scatterplots: -1, 0.996, …
Scatterplot 1, \( r = -0.721 \) Scatterplot 2, \( r = 0.721 \) Scatterplot 3, \( r = 0.996 \) Scatterplot 4, \( r = 1 \) Scatterplot 5, \( r = -1 \) (Note: The exact scatterplot n…
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parent results not recorded. continue practising or switch user. which …
$\frac{1}{4} \times 44$ (the fourth option)
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test the claim about the population variance $\\sigma^2$ at the level o…
# Explanation: ## Step1: Recall P - value formula for chi - square test For a chi - square test of variance, the test statistic is \(\chi^{2}=\frac{(n - 1)s^{2}}{\sigma_{0}^{2}}\)…
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evaluate the expression. \\(\\frac{_7c_2 \\cdot _3c_1}{_9c_3}\\) \\(\\f…
$\frac{3}{4}$
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a researcher investigated the effects of elevation on slugging percenta…
B. There is a significant positive trend in the data.
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9. the model shows the percent of students who voted for a tiger as the…
9. Yes, more than 50% did not vote for tiger (60% did not). 10. No, only 70% are going (less than 75%). 11. 20% 12. Yes, the student is correct.
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practice. 4 choose the graph that models the correct line of best fit.
B (the graph labeled B)
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bob makes his first $700 deposit into an ira earning 6.7% compounded an…
\(85974.27\)
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test the claim about the population variance $\\sigma^2$ at the level o…
\(97.22\)
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test the claim about the population variance $\\sigma^2$ at the level o…
\( H_0: \sigma^2 = 34.9 \) \( H_a: \sigma^2 eq 34.9 \)
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a researcher investigated the effects of elevation on slugging percenta…
C. (The scatterplot with a positive trend, x - axis from 0 to 5400, y - axis from 0.45 to 0.65, and points showing an upward trend as elevation increases)
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educators are constantly evaluating the efficacy of public schools in t…
A
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15 business bell ringer prompt define the term: break - even point. res…
The break-even point is the level of sales where total revenue equals total costs, meaning no profit or loss is incurred.
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h_a: σ≤41 h_a: σ>41 c. h_0: σ<41 h_a: σ≥41 d. h_0: σ≥41 h_a: σ<41 ident…
C. Fail to reject \(H_0\). There is not enough evidence at the \(1\%\) level of significance to support the claim.
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use a \\(\\chi^2\\)-test to test the claim \\(\\sigma < 41\\) at the \\…
The critical value is \(7.015\)
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of the 40 plays attributed to a playwright, 12 are comedies, 13 are tra…
13:27
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use a \\(chi^2\\)-test to test the claim \\(sigma < 41\\) at the \\(alp…
The standardized test statistic is approximately \(\boldsymbol{18.710}\) (rounded to three decimal places). For the null and alternative hypotheses, the correct option is: D. \(H_…
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the ages and genders of people who attended a play are recorded below. …
D. \(\frac{32}{95}\)
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suppose there is a list of three jokes about books. in how many ways ca…
6
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use a $chi^2$-test to test the claim $sigma < 41$ at the $alpha = 0.01$…
The standardized test statistic is approximately \(18.710\) (rounded to three decimal places).
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use a \\(chi^2\\)-test to test the claim \\(sigma < 41\\) at the \\(alp…
D. $H_0: \sigma \geq 41$, $H_a: \sigma < 41$
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identifying outliers complete the sentence and answer the question. thi…
This graph has no linear association.
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use a \\(\\chi^2\\)-test to test the claim \\(\\sigma \\geq 39\\) at th…
B. Fail to reject $H_0$. There is not enough evidence at the 10% level of significance to reject the claim.
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identifying outliers complete the sentence and answer the question. thi…
none
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a single die is rolled twice. find the probability of rolling a 6 the f…
$\frac{1}{36}$
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determine whether each statement is true or false. if the statement is …
B. This statement is false. To make this statement true, change "M + N + P" to "M • N • P".
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parent results not recorded. continue practisin what is 70% of $60? $
$42$
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click the icon to view the chi-square critical values table. identify t…
A. \(H_0:\sigma\geq39\), \(H_a:\sigma < 39\)
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parent results not recorded. continue practising or switch user. comple…
9
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use a $chi^2$-test to test the claim $sigma geq 39$ at the $alpha = 0.1…
The standardized test statistic is approximately $\boldsymbol{10.775}$.
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practice: y battery life percentage 0 2 4 6 8 10 hours after 7 am 2. in…
- Slope Interpretation: The battery life percentage decreases by 6 percentage points per hour after 7 AM. - y - Intercept Interpretation: At 7 AM (0 hours after 7 AM), the battery…
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parent results not recorded. continue practising or switch user. which …
$\frac{9}{10}\times320$
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use a $chi^2$-test to test the claim $sigma geq 39$ at the $alpha = 0.1…
The standardized test statistic is approximately $\boldsymbol{10.775}$
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parent results not recorded. continue practising or switch user. which …
\(\frac{2}{3}\times510\)
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denotation v.s. connotation instructions: write the denotation (literal…
| Word | Denotation | Connotation | Why? what associations do you make with this word? | |-----------|----------------------------------------------------------------------------|…
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the movement of the progress bar may be uneven because questions can be…
A. The book can be shaped to fit into a small space.