統計與機率
資料分析、機率分佈、假設檢定與統計方法。
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the following pulse rates were recorded for a group of 15 students. the…
\(7\)
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a random variable is normally distributed. it has a mean of 248 and a s…
- For the shape of the sampling distribution when \(n = 13\): The third option “If the sample size is 13, then you can say the sampling distribution of the sample mean is normally…
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the following pulse rates were recorded for a group of 15 students. the…
\(6\)
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an unanswered constitutional question about the judicial branch involve…
what “good behavior” means, with regard to judicial terms.
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7. the graph below shows the number of households in a town that subscr…
a) \(1996\) b) Approximately \(32000\) c) The number of newspaper delivery subscriptions is decreasing over time.
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the arrows can only be dragged to z scores that are accurate to 1 place…
\(0.1250\)
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protection of habeas corpus means that citizens cannot be punished with…
citizens cannot be held without legal action.
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sat scores in one state is normally distributed with a mean of 1493 and…
a) \(0.4865\) b) \(0.4181\)
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the graph illustrates a normal distribution for the prices paid for a p…
- The probability that a buyer paid between \(\$1705\) and \(\$1895\) is \(0.68\) - The probability that a buyer paid between \(\$1610\) and \(\$1800\) is \(0.48\) - The price a b…
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students in mr. lyles class voted for their favorite spirit - week them…
\(\frac{1}{3}\)
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an airliner carries 300 passengers and has doors with a height of 75 in…
B. The probability from part (b) is more relevant because it shows the proportion of flights where the mean height of the male passengers will be less than the door height.
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an airliner carries 300 passengers and has doors with a height of 75 in…
a. \(0.9838\) b. \(1\) c. B. The probability from part (b) is more relevant because it shows the proportion of flights where the mean height of the male passengers will be less th…
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an airliner carries 300 passengers and has doors with a height of 75 in…
\(1.0000\) (rounded to four decimal places)
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an airliner carries 300 passengers and has doors with a height of 75 in…
A. The probability from part (a) is more relevant because it shows the proportion of flights where the mean height of the male passengers will be less than the door height.
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an airliner carries 300 passengers and has doors with a height of 75 in…
$1.0000$
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an airliner carries 300 passengers and has doors with a height of 75 in…
\(0.9838\)
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before every flight, the pilot must verify that the total weight of the…
B. Yes. Because the probability is high, the pilot should take action by somehow reducing the weight of the aircraft.
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the wingspans of about herons are approximately normally distributed wi…
\(0.0188\)
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before every flight, the pilot must verify that the total weight of the…
\(0.9785\)
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for questions 5 and 6, graph the data on the grids provided below, then…
5. No relationship. 6. Positive relationship.
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before every flight, the pilot must verify that the total weight of the…
\(0.9788\)
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when women were finally allowed to become pilots of fighter jets, engin…
a. \(0.3286\) b. \(0.8706\) c. B. The part (a) probability is more relevant because the seat performance for a single pilot is more important.
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when women were finally allowed to become pilots of fighter jets, engin…
a. \(0.3286\) b. \(0.8706\)
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the wingspans of adult herons are approximately normally distributed wi…
a. \(0.0086\) b. \(143.6\) c. \(105.6\), \(148.4\) d. \(0.7666\)
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when women were finally allowed to become pilots of fighter jets, engin…
\(0.3286\)
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an elevator has a placard stating that the maximum capacity is 3700 lb-…
b. $1$; c. D. No, because there is a good chance that 26 randomly selected adult male passengers will exceed the elevator capacity.
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using the standard normal distribution, find the two z - scores that fo…
Negative \(z\) - score \(=-0.28\) Positive \(z\) - score \(=0.28\)
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an elevator has a placard stating that the maximum capacity is 3700 lb—…
a. The probability that 1 randomly selected adult male has a weight greater than \(142\) lb is approximately \(0.9279\) b. The probability that a sample of \(26\) randomly selecte…
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find the z - score for the given shaded region under the standard norma…
\(0.0753\)
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assume that the amounts of weight that male college students gain durin…
a. The probability that a randomly - selected male college student gains between \(0\) kg and \(3\) kg is \(0.2434\). b. The probability that the mean weight gain of \(9\) randoml…
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assume that the amounts of weight that male college students gain durin…
\(0.6505\)
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assume that the amounts of weight that male college students gain durin…
\(0.2434\)
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the overhead reach distances of adult females are normally distributed …
a. \(0.0427\) b. \(0.8315\) c. B. The normal distribution can be used because the original population has a normal distribution.
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for a standard normal distribution, use technology to compute the follo…
a) \(0.7281\) b) \(0.3227\) c) \(0.3918\) d) \(0.0174\)
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the overhead reach distances of adult females are normally distributed …
a. \(0.0427\) b. \(0.8315\) c. Because the population is normally distributed, the sampling distribution of the sample mean is also normally distributed for any sample size \(n\) …
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assume that females have pulse rates that are normally distributed with…
a. The probability that a randomly - selected adult female has a pulse rate less than \(80\) is \(0.6844\). b. The probability that \(4\) randomly - selected adult females have a …
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assume that females have pulse rates that are normally distributed with…
\(0.8315\)
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the mean temperature in new york city over last month was 84 degrees fa…
a) About 68%: \(76\) and \(92\); About 95%: \(68\) and \(100\); Almost all: \(60\) and \(108\) b) No, 80 would not be considered unusual because it falls within one standard devia…
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assume that females have pulse rates that are normally distributed with…
\(0.6844\)
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2. nick tells his sister penny that he gets up when his alarm clock rin…
a. Yes. If Nick's claim (\(p = 0.85\)) were true, using the binomial distribution \(P(X = 4)\approx0.0616\) (a relatively low probability for the observed sample result), so there…
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according to a recent publication, the mean price of new mobile homes i…
a. Mean of \(\bar{x}\): \(\$64500\), Standard deviation of \(\bar{x}\): \(\$1320\). Interpretation: The average value of the sample means of samples of size \(25\) is the populati…
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according to a recent publication, the mean price of new mobile homes i…
a. The mean of all possible sample mean prices is $\$64500$ and the standard deviation is $\$1320$. b. The mean of all possible sample mean prices is $\$64500$ and the standard de…
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1. about 50% of the time marissa packs a sandwich for her lunch. about …
Use \(26\) cards for sandwich (50% of \(52\)), \(13\) cards for leftovers (25% of \(52\)) and \(13\) cards for take - out (25% of \(52\)). Shuffle and draw a card to simulate the …
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1. about 50% of the time marissa packs a sandwich for her lunch. about …
The single dot above the 5 represents one trial (rolling three dice) where the sum of the values on the three dice was 5. ### Question 3b # Step - by - Step Format: ## Step1: Coun…
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according to a recent publication, the mean price of new mobile homes i…
a. The mean of all possible sample - mean prices is \(\$64500\) and the standard deviation is \(\$1320\) b. For \(n = 50\), the mean of the sample means \(\mu_{\bar{x}} = 64500\) …
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it mattered a little less the cardinals had beaten them by brawn and br…
muscularity
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question 15 given degree of freedom df = 13, find the probability by us…
\(0.033\)
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according to a recent publication, the mean price of new mobile homes i…
a. The mean of all possible sample mean prices is \(\$65300\) and the standard deviation is \(\$1600\) b. The mean of all possible sample mean prices is \(\$65300\) and the standa…
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then real fear came as her illness recurred at shorter intervals. sourc…
repeated
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according to a recent publication, the mean price of new mobile homes i…
a. The mean of all possible sample - mean prices is \(\$65300\) and the standard deviation is \(\$1600\) b. The mean of all possible sample - mean prices is \(\$65300\) and the st…
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according to a recent publication, the mean price of new mobile homes i…
a. The mean of all possible sample mean prices is $\$65300$ and the standard deviation is $\$1600$. b. When \(n = 50\), the mean of the sample mean ($\bar{x}$) is $\mu_{\bar{x}} =…
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o child is born a delinquent,\ mom said. source: the glass ca in this s…
a young offender
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according to a recent publication, the mean price of new mobile homes i…
a. The mean of all possible sample - mean prices is $\$65300$ and the standard deviation is $\$1600$. b. The mean of all possible sample - mean prices is $\$65300$ (since $\mu_{\b…
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the governor of a state wanted to assess the public education system of…
b. \(\mu_{\bar{x}} = 77\), \(\sigma_{\bar{x}}\approx1.2\) c. \(\mu_{\bar{x}} = 77\), \(\sigma_{\bar{x}}\approx0.9\)
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the governor of a state wanted to assess the public education system of…
b. \(\mu_{\bar{x}} = 77\), \(\sigma_{\bar{x}}\approx1.2\) c. \(\mu_{\bar{x}} = 77\), \(\sigma_{\bar{x}}= 0.85\)
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the governor of a state wanted to assess the public education system of…
\(\mu_{\bar{x}} = 77\), \(\sigma_{\bar{x}} = 0.85\)
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the governor of a state wanted to assess the public education system of…
\(\mu_{\bar{x}} = 77\), \(\sigma_{\bar{x}}\approx1.2\)
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the governor of a state wanted to assess the public education system of…
\(77\)
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grammar - in - context for most people, a job means they get up at 7:00…
1. B. have 2. B. to 3. A. their 4. A. is 5. D. don't 6. B. fly 7. A. in 8. C. invites 9. C. Is 10. C. isn't 11. B. an exciting 12. D. can say
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this was clearly not just another rumble between rival fans. source: th…
A. fight
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evaluate ( z=\frac{overline{x}-mu}{\frac{sigma}{sqrt{n}}} ) if ( overli…
\(-57.83\)
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most people think that the ormal\ adult body temperature is 98.6°f. in …
a) \(97.4^{\circ}F\) and \(99.0^{\circ}F\) b) \(15.87\%\) c) \(97.9^{\circ}F\)
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a bag with 12 marbles has 5 red marbles, 3 yellow marbles, and 4 blue m…
\(\frac{5}{12}\)
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rivalry means : the act of breaking up the formal act of proclaiming; g…
the act of competing as for profit or a prize
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a spinner with 10 equally sized slices has 3 blue slices, 2 yellow slic…
\(\frac{1}{2}\)
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try again your answer is incorrect. you can simplify the fraction. a ba…
\(\frac{1}{2}\)
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most people think that the ormal\ adult body temperature is 98.6°f. in …
a) Most people's body temperatures are between \(97.4^{\circ}F\) and \(99^{\circ}F\) (because of the 68 - 95 - 99.7 Rule where for 95% of the data in a normal distribution, the in…
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incidentally has the same or almost the same meaning as: accidentally c…
A. accidentally
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a bag with 8 marbles has 4 yellow marbles and 4 blue marbles. a marble …
\(\frac{1}{2}\)
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a bag with 12 marbles has 5 red marbles, 3 blue marbles, and 4 yellow m…
\(\frac{5}{12}\)
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the term \freshman 15\ refers to the claim that college students typica…
B. No, because the percentage is low. Most freshmen males do not gain 15 pounds or more.
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the term \freshman 15\ refers to the claim that college students typica…
\(12.1\%\)
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correct the text by inserting a comma or commas. (note: in this skill, …
Hanoi, Vietnam has had many names throughout the centuries, including Thang Long, which means Soaring Dragon.
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engineers want to design seats in commercial aircraft so that they are …
\(16.1\)
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world duty free won a five - year contract to sell perfume and cosmetic…
B. franchise
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a game uses a cube that has a different weather symbol on each face. ro…
3
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find the indicated iq score. the graph to the right depicts iq scores o…
\(94\)
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find the indicated iq score. the graph to the right depicts iq scores o…
\(x = 98\)
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in the comics club, \\( \\frac { 1 } { 3 } \\) of the members draw thei…
\(8\)
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if a company received some negative publicity (rat found in drink), dem…
fall
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correct the text by inserting one comma. (note: in this skill, serial c…
While the new regulations were simply meant to prevent the spread of food - borne illness, many chefs found them burdensome.
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find the indicated iq score. the graph to the right depicts iq scores o…
\(94\)
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find the indicated iq score. the graph to the right depicts iq scores o…
\(x = 94\)
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a variable is normally distributed with mean 7 and standard deviation 2…
a. \(81.85\%\) b. \(93.32\%\) c. \(2.28\%\)
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assume that adults have iq scores that are normally distributed with a …
\(0.0256\)
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assume that adults have iq scores that are normally distributed with a …
\(0.8413\)
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find the area of the shaded region. the graph to the right depicts iq s…
\(0.3518\)
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find the area of the shaded region. the graph to the right depicts iq s…
\(0.6568\)
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find the area of the shaded region. the graph to the right depicts iq s…
\(0.5793\)
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find the area of the shaded region. the graph to the right depicts iq s…
\(0.0475\)
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find the area of the shaded region. the graph to the right depicts iq s…
\(0.9525\)
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incidentally means : by the way (used to introduce a new topic) with ob…
by the way (used to introduce a new topic)
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sophisticated means : relating to times long past causing or marked by …
intellectually appealing
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assume that a randomly selected subject is given a bone density test. t…
\(-1.88,1.88\)
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swimmers at city pool use the regression equation for the number of swi…
The number of swimmers when the temperature is \(100^{\circ}F\) is predicted to be \(62\). If there are \(26\) swimmers at the pool, the outside temperature is likely to be \(75.9…
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corey used the regression equation ( y = 1.505x - 88.21 ), where ( x ) …
He substituted 80 for \(x\) instead of \(y\).
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assume that a randomly selected subject is given a bone density test. b…
\(-1.23\)
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he looked up and down the deck at the folded and stricken bodies; and h…
afflicted
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nonchalantly has the same or almost the same meaning as: historically o…
indifferently
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find the indicated z score. the graph depicts the standard normal distr…
\(-1.08\)