What is the probability that the mean for a sample of 36 teachers' salaries is lesser than ₱20,000?
Q: What is the probability that a first grade classroom of 20 students who are chosen randomly from the…
A: Given Information: Mean μ=100 Standard deviation σ=15 Sample size n=20
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A: Let X be length of time marks the longest 2.16 % of all pregnancies from normal distribution with…
Q: A 4 year college will accept any student ranked in the top 60% of a national exam. If the test…
A: From the given information,Mean (µ) =600Standard deviation (σ) = 100Let the test score be a x which…
Q: You are to write down on a piece of paper the number of credits you are taking this semester. Your…
A: Give the general format for solving this problem as below. Summarize the recorded date of number of…
Q: What is the standard deviation on the graph ?
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Q: The mean clotting time of blood is 7.45 seconds with a standard deviation of 3.6 seconds. What is…
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Q: The length of human pregnancies from conception to birth approximates a normal distribution with a…
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Q: The mean and standard deviation for last year's final exam were 69 and 10, respectively. This year,…
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Q: he number of bank robberies that occur in a large North American city is Poisson distributed with a…
A: Given : Let X : No. of bank robberies that occur in a large North American city is Poisson…
Q: The U.S. Center for Disease Control reports that in year 1900, the mean life expectancy is 47.6…
A: 1.) Preliminary Condition Check: a.) One condition that must be satisfied for the independent t-test…
Q: The weights of college football players are normally distributed with a mean of 200 pounds and a…
A: Answer:From the given data,Let X: The weights of college football playersX is normally distributed…
Q: The average monthly income of public school teachers is Php25,000 with standard deviation of Php800.…
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Q: The Coffee Bean and Tea Leaf morning customer load follows a normal distribution with mean 46 and…
A: Solution
Q: Find the probability of adult male residents in the U.S. whose heights are between 63 and 72 inches.…
A: Let , X→N(μ=69.0 , σ=2.8) Our aim is to find the following : Find the probability of adult male…
Q: The average time a person spends shopping in a grocery store is 43 minutes. If the time is normally…
A: Given: The average time a person spends shopping in a grocery store is 43 minutes. The time is…
Q: If the scores follow normal distribution with the mean of 84 and a standard deviation of 7, find…
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Q: In a recent awards ceremony the age of the winner for the best actor award was 34 and the age of the…
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Q: Nationally the average score on the college entrance exams (Verbal test) is 453 with a standard…
A: Consider that μ is the population mean score. Null hypothesis: H0: μ = 453. Alternative hypothesis:…
Q: The time spent in days waiting for a heart transplant can be approximated by a normal distribution…
A: Given information- Population mean, μ = 127 days Population standard deviation, σ = 23.5 days Since…
Q: yo station has a probability of 0.02 of connecting, that is, of not obtaining a busy signal. Assume…
A: Given See the handwritten solution
Q: The average national SAT score is 1019. If we assume a bell shaped distribution and a standard…
A: Introduction: Researchers convert normal distributions into the sampling distribution to figure out…
Q: normal distribution has a mean of 80 and a standard deviation of 14. Determine the value above which…
A: Given that X~N(μ= 80 , σ= 14 ) μ= 80 , σ= 14 Formula for Z-score Z=(X-μ)/σ
Q: A professional basketball team avg 110 points per game with a standard deviation of 15 points.…
A: The basketball team's points in each game are normally distributed.Population mean, Population…
Q: The length of human pregnancies from conception to birth approximates a normal distribution with a…
A: From the provided information, Mean (µ) = 268 Standard deviation (σ) = 17
Q: The mean gas mileage for cars driven by the students at Chillville High Schoo is 28.0 miles per…
A: Normal distribution is continuous distribution which has many real life applications. Standard…
Q: tatistics Canada reports that of people who usually work full-time, the average number of hours…
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Q: The waist girth of 2,500 employees in a large company follows the normal distribution with mean of…
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Q: whites surveyed, the mean life span was 49 years with a standard deviation of 12.1 nonwhites, the…
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Q: If the normal operating life of a car is considered to be 150,000 miles, with a standard deviation…
A: The probability that a car will last 200,000 miles is calculated as follows:
Q: The scores of a standarlized test form a normal distribution with a mean of 300 and standard…
A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…
Q: 2) The height of women in the United States fits a normal distribution with a mean height of 64.5…
A: using:- The table below shows Z values for commonly used percentiles. Percentile Z 1st…
Q: Define the term standard deviation?
A: Standard deviation: The standard deviation indicates by how much each observation differs from a…
Q: Suppose that blood chlorine concentration (mmol/L) has a normal distribution with mean=98 and…
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Q: t is known that the average time required to complete a test exam is 80 minutes and the standard…
A: Given Information: Mean μ=80 min Standard deviation σ=10 min. To find how many minutes should the…
Q: A division-wide aptitude test was conducted on 10 000 pupils. the mean of the test is 58 and…
A: Given, A division-wide aptitude test was conducted on N=10 000 pupils. The test, The scores also…
Q: Assume that people playing World of Warcraft in a week has a normal distribution with a mean of 54…
A: The probability that a randomly selected person played more than 89 hours is obtained below, From…
Q: In 2021, the CDC estimated the mean height of U.S. women aged 20 years old and over was 63.5 inches…
A: Given that:The population mean height of U.S. women: inches and The population standard deviation:…
Q: Assume the average amount of caffeine consumed daily by adults is normally distributed with a mean…
A: The detailed solution is as follows below:
Q: The average wage for bank managers in a certain city is $91,900 per hour with a standard deviation…
A: Given that X~N( μ = 91900 , ? = 24300) μ = 91900 , ? = 24300 Z-score =( x - μ )/?
Q: In a job fair, 3000 applicants applied for a job. Their mean age was formed to be 28 with a standard…
A: The standard normal curve is plotted where mean is in the center and there are two lines on each…
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- A distribution is known to be bell-shaped, with a mean of 82 and a standard deviation of 6. What percentage of the data should fall below 76?According to the World Health Organization (WHO) Child Growth Standards, the head circumference for girls who are two-years old has a normal probability distribution with a mean of 47.2cm and a standard deviation of 1.4cm. What is the head circumference of a two-year old girl who marks the start of the 90th percentile? Enter a number without units.The admission committee of AUCA enrolls 39% of those who took the exam. If the scoresfollow a normal distribution with a mean of 630 and a standard deviation of 25, what isthe passing score?
- A random sample of 47 cars in the drive-thru of a popular fast food restaurant revealed an average bill of $17.51 per car. The population standard deviation is $6.05. Estimate the mean bill for all cars from the drive thru with 91% confidence.The standard deviation of the lengths of a hospital stay on the intervention ward is 8.7 days. What is the probability that the sampling error made in estimating the population mean length of stay by the mean length of stay of a sample of 73 patients will be at most 2 daysThe mean clotting time of blood is 7.45 seconds with a standard deviation of 3.6 seconds. What is the probability that an individual's clotting time will be less than 2 seconds or greater than 13 seconds? Assume a normal distribution. The probability is?
- The mean clotting time of blood is 7.45 seconds with a standard deviation of 3.6 seconds. What is the probability that an individual's clotting time will be less than 7 seconds or greater than 9 seconds? Assume a normal distribution.a normal distribution has a mean of 25 and standard deviation of 5. what score separates the lowest 30% of the distribution from the rest of the scores?A recent survey reported that 47% of 18- to 29-year-olds in a certain country own tablets. Use binomial distribution. What are the mean and standard deviation of the number of 18 to 29 year old who will own a tablet in a survey of six?
- Suppose that the mean IQ score for University Students is 105, with a standard deviation of 7. Assuming a normal distribution, what are the cutoffs that will capture those people who are within one standard deviation of the mean?The average score of all golfers for a particular course has a mean of 78 and a standard deviation of 5. Suppose 100 golfers played the course today. Find the probability that the average score of the 100 golfers exceeded 79, rounding to four decimal places.