Statistiques
Analyse de données, distributions de probabilités et tests d'hypothèses.
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type the correct answer in each box. use numerals instead of words. if …
The probability of rolling a five is \( \frac{1}{6} \) The probability of flipping the coin and it landing on heads is \( \frac{1}{2} \) The probability of rolling a five and land…
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the director of health services is concerned about a possible flu outbr…
$\frac{39}{80}$
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3. kate is a professional musician. she wants to make an essential purc…
a. $679.63$ b. $689.5$ c. $699$
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what is the correct meaning of the word abide? when we visit grandmas h…
C. submit to
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the development of a system of mass production in manufacturing meant t…
machines rapidly produced large amounts of products.
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listed below are amounts (in millions of dollars) collected from parkin…
13.3
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a free negro of the african race, whose ancestors were brought to this …
"not a 'citizen' within the meaning of the Constitution of the United States" "they were not regarded in any of the States as members of the community" "not numbered among its 'pe…
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a professor believes that, for the introductory art history classes at …
We fail to reject the null hypothesis and conclude that there is insufficient evidence at a 0.02 level of significance to support the professor's claim that the mean test score of…
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question 2 of 6, step 2 of 3 a professor believes that for the introduc…
$-1.64$
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question 9 1 pts what type of relationship means that both you and your…
Question 9: D. Reciprocal Question 10: A. Chronos
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a professor believes that for the introductory art history classes at h…
< $H_0:\mu_1=\mu_2$ $H_a:\mu_1 < \mu_2$ >
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which sentence demonstrates the connotative meaning of the word \breath…
Breath implies life and strength.
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question 1 of 6, step 3 of 3 2/20 correct fran is training for her firs…
We fail to reject the null hypothesis and conclude that there is insufficient evidence at a 0.10 level of significance to support Fran's claim that there is a significant differen…
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fran is training for her first marathon, and she wants to know if there…
$-2.02$
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question 1 of 6, step 1 of 3 correct fran is training for her first mar…
$ eq$
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a parenting magazine reports that the average amount of wireless data u…
$-1.957$
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one cable company claims that it has excellent customer service. in fac…
We fail to reject the null hypothesis and conclude that there is insufficient evidence at a 0.01 level of significance that it takes over 45 minutes for the cable technician to ar…
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one cable company claims that it has excellent customer service. in fac…
$1.908$
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one cable company claims that it has excellent customer service. in fac…
$H_a:\mu > 45$
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a pizza delivery chain advertises that it will deliver your pizza in 30…
We fail to reject the null hypothesis and conclude that there is insufficient evidence at a 0.05 level of significance that the mean delivery time is actually more than 30 minutes.
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a pizza delivery chain advertises that it will deliver your pizza in 30…
$1.393$
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the dodge reports are used by many companies in the construction field …
We fail to reject the null hypothesis and conclude that there is insufficient evidence at a 0.01 level of significance to support the claim that the average time required to insta…
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the dodge reports are used by many companies in the construction field …
$-1.996$
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16. choose the best answer. domesticated means ____ tamed and kept for …
A. tamed and kept for use by humans
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a group of local businessmen is thinking about developing land into a s…
>
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it currently takes users a mean of 44 minutes to install the most popul…
We reject the null hypothesis and conclude that there is sufficient evidence at a 0.10 level of significance that the new mean installation time is different from 44 minutes and t…
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it currently takes users a mean of 44 minutes to install the most popul…
$2.660$
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it currently takes users a mean of 44 minutes to install the most popul…
$ eq$
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question 7 of 8, step 1 of 3 17/24 correct in preparation for upcoming …
\( eq\)
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the board of a major credit card company requires that the mean wait ti…
We reject the null hypothesis and conclude that there is sufficient evidence at a 98 % level of confidence to support the claim that the mean wait time is longer than 3.50 minutes.
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the board of a major credit card company requires that the mean wait ti…
$2.45$
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question 6 of 8, step 1 of 3 correct the board of a major credit card c…
$H_0:\mu = 3.50$, $H_a:\mu>3.50$
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hurricane andrew swept through southern florida causing billions of dol…
$2.16$
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describing restrictive and nonrestrictive clauses. sort each characteri…
Restrictive: needed to maintain meaning, not set apart by punctuation, essential to the sentence Non - restrictive: not needed to maintain meaning, set apart by punctuation, not e…
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hurricane andrew swept through southern florida causing billions of dol…
$H_a:\mu > 24500$
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does the frequency distribution appear to have a normal distribution? e…
B. Yes, because the frequencies start low, proceed to one or two high frequencies, then decrease to a low frequency, and the distribution is approximately symmetric.
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fill in the blank. in a ______ distribution, the frequency of a class i…
relative frequency
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construct one table that includes relative frequencies based on the fre…
A. Yes, because the relative frequency of the higher tar classes is greater for nonfiltered cigarettes.
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a manufacturer must test that his bolts are 4.00 cm long when they come…
We fail to reject the null hypothesis and conclude that there is insufficient evidence at a 0.02 level of significance that the mean length of the bolts is different from 4.00 cm …
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a manufacturer must test that his bolts are 4.00 cm long when they come…
$2.02$
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a manufacturer must test that his bolts are 4.00 cm long when they come…
$ eq$
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a national online business magazine reports that the average cost of a …
We fail to reject the null hypothesis and conclude that there is insufficient evidence at a 0.02 level of significance to support the claim that the average cost of a speeding tic…
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construct one table that includes relative frequencies based on the fre…
| Tar (mg) | Relative Frequency (Nonfiltered) | Relative Frequency (Filtered) | | ---- | ---- | ---- | | $3 - 8$ | $8\%$ | $4\%$ | | $9 - 14$ | $4\%$ | $8\%$ | | $15 - 20$ | $52\%…
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a national online business magazine reports that the average cost of a …
$0.71$
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question 10 points 1 which leader advocated for african americans to pu…
C. Booker T. Washington
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construct one table that includes relative frequencies based on the fre…
We cannot complete the relative - frequency table without the actual frequency values. However, for the multiple - choice question about the effectiveness of filters: A. Yes, beca…
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choose the correct histogram below. does the histogram appear to depict…
C. The histogram appears to depict a normal distribution. The frequencies generally increase to a maximum and then decrease, and the histogram is roughly symmetric.
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government regulations restrict the amount of pollutants that can be re…
We reject the null hypothesis and conclude that there is sufficient evidence at a 0.05 level of significance to support the claim that the average pollutants produced by REM Indus…
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read the passage from marriage is a private affair by chinua achebe. in…
A. A historical perspective would focus on arranged marriage being part of the culture at the time the story is set. A feminist perspective would focus on how arranged marriages t…
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government regulations restrict the amount of pollutants that can be re…
$-2.45$
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read the passage from marriage in a private affair by chinua achebe. \f…
Men make decisions, and women accept those decisions.
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read the passage from marriage is a private affair by chinua achebe. on…
Fathers and sons are beginning to have different ideas about what marriage is.
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the iq scores of 50 students are given below. 112 97 106 98 102 90 107 …
| Class | Frequency | | ---- | ---- | | 85 - 89 | 5 | | 90 - 94 | 8 | | 95 - 99 | 9 | | 100 - 104 | 12 | | 105 - 109 | 10 | | 110 - 114 | 7 | | 115 - 119 | 4 |
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the table below shows the frequency distribution of the weights (in gra…
C. The histogram appears to depict a normal distribution. The frequencies generally increase to a maximum and then decrease, and the histogram is roughly symmetric.
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the mayor of a town believes that 67% of the residents favor annexation…
There is sufficient evidence at the 0.10 level of significance to say that the percentage of residents who support the annexation is not 67 %.
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an automobile manufacturer claims that their van has a 46.9 miles/gallo…
$H_0:\mu = 46.9$ $H_a:\mu>46.9$
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question 7 0/2 pts 3 5 details during one shift, the express lane clerk…
4
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an engineer has designed a valve that will regulate water pressure on a…
$H_0:\mu = 7.3$ $H_a:\mu<7.3$
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a sample of 1300 computer chips revealed that 39% of the chips fail in …
$H_0:p\geq0.42$ $H_a:p < 0.42$
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an automobile manufacturer claims that their jeep has a 40.4 miles/gall…
$H_0:\mu = 40.4$ $H_a:\mu<40.4$
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a manufacturer of potato chips would like to know whether its bag filli…
There is sufficient evidence at the 0.02 level of significance that the machine is overfilling the bags.
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the mayor of a town believes that more than 46% of the residents favor …
$H_0:p\leq0.46$ $H_a:p > 0.46$
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the mayor of a town believes that under 28% of the residents favor cons…
There is sufficient evidence at the 0.10 level of significance that the percentage of residents who support the construction is under 28 %.
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identify the lower class limits, upper class limits, class width, class…
Class width: $1$ Class mid - points: $20.5,22.5,24.5,26.5,28.5,30.5,32.5$ Class boundaries: $19.5,21.5,23.5,25.5,27.5,29.5,31.5,33.5$ Number of individuals: $88$
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an engineer has designed a valve that will regulate water pressure on a…
$H_0:\mu = 5.6$ $H_a:\mu>5.6$
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an automobile manufacturer claims that their van has a 51.8 miles/gallo…
$H_0:\mu = 51.8$ $H_a:\mu eq51.8$
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a manufacturer of chocolate chips would like to know whether its bag fi…
$H_0:\mu = 405$ $H_a:\mu<405$
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the mayor of a town believes that under 56% of the residents favor anne…
$H_0:p\geq0.56$ $H_a:p < 0.56$
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the mayor of a town believes that under 36% of the residents favor cons…
There is not sufficient evidence at the 0.05 level of significance that the percentage of residents who support the construction is under 36 %.
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a sample of 1300 computer chips revealed that 51% of the chips do not f…
$H_0:p = 0.54$ $H_a:p eq0.54$
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6. which context clue helps you understand the meaning of batter in the…
C. baked into a cake
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four - handed piano which line from the story best supports a theme tha…
"Her clean, simple performance of “Für Elise” had let me hear a well - worn selection as if it were a new piece of music."
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a hospital director believes that 74% of the lab reports contain errors…
$H_0:p = 0.74$ $H_a:p eq0.74$
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a sample of 1500 computer chips revealed that 41% of the chips fall in …
$H_0:p\geq0.44$ $H_a:p < 0.44$
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the mayor of a town believes that over 27% of the residents favor const…
There is sufficient evidence at the 0.02 level of significance that the percentage of residents who support the construction is over 27 %.
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analyzing a passage from a feminist perspective \i cant - we must - i m…
Men hold power over women. Women are not treated as equal. Women's roles are defined by men.
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a manufacturer of chocolate chips would like to know whether its bag fi…
$H_0:\mu = 412$ $H_a:\mu>412$
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inspectors for a hospital chain with multiple locations randomly select…
C. Cluster random sample
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a researcher polls people as they walk by on the street. what type of s…
E. None of the above
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a tv show host asks his viewers to visit his website and respond to an …
E. None of the above
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a large bakery mass produces cakes on an assembly line. each shift, a q…
D. Systematic random sample
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the mayor of a town believes that less than 57% of the residents favor …
$H_0:p\geq0.57$ $H_a:p < 0.57$
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each law firm in one state registers its phone number with the state co…
A. Simple random sample
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using traditional methods it takes 98 hours to receive an advanced driv…
There is not sufficient evidence at the 0.02 level of significance that the new technique reduces training time.
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a school chooses 3 randomly selected athletes from each of its sports t…
B. Stratified random sample
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in passage 2, how does the underlined paragraph on pages 2 - 3 contribu…
It establishes a contrast between travelling on land and travelling on the sea.
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construct one table that includes relative frequencies based on the fre…
A. Yes, because the relative frequency of the higher tar classes is greater for nonfiltered cigarettes.
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a principal orders t - shirts and wants to check some of them to make s…
C. Cluster random sample
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fill in the blank. class width is found by ______. choose the correct a…
B. subtracting a lower class limit from the next consecutive lower class limit
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an automobile manufacturer claims that their van has a 36.5 miles/gallo…
$H_0:\mu = 36.5$ $H_a:\mu>36.5$
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question 6 of 20, step 1 of 1 4/29 correct a manufacturer of chocolate …
There is not sufficient evidence at the 0.05 level of significance that the machine is underfilling the bags.
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a manufacturer of chocolate chips would like to know whether its bag fi…
There is sufficient evidence at the 0.05 level of significance that the machine is overfilling the bags.
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a manufacturer of banana chips would like to know whether its bag filli…
$H_0:\mu = 438$ $H_a:\mu<438$
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the mayor of a town believes that above 72% of the residents favor anne…
$H_0: p\leq0.72$ $H_a: p > 0.72$
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question 2 of 20, step 1 of 1. the mayor of a town believes that over 3…
There is not sufficient evidence at the 0.10 level of significance that the percentage of residents who support the annexation is over 37 %.
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read the selection and choose the best answer to each question. zoo by …
To hold in one's arms
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an automobile manufacturer claims that their van has a 52.5 miles/gallo…
$H_0:\mu = 52.5$ $H_a:\mu eq52.5$
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mr. thompson runs his own printing and bookbinding business. he suspect…
D. 23, 24, 39, 58, 32
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willy runs a small company with 10 employees. he decides to pick a simp…
D. 6, 7, 1
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the given data represents a frequency distribution of the f - scale int…
Construct a frequency polygon: To construct the frequency polygon, we plot the points \((0,24)\), \((1,16)\), \((2,2)\), \((3,3)\), \((4,1)\) and connect them with straight lines.…