There is an average of 4 accidents in a week on a major highway in the city. What is the standard deviation of the distribution? O a. 42 Оь. 2 О с. 4 i O d. 8

Q: In your school with 400 Grade 11 students, the final examination in General Mathematics has a mean…

A:

Q: A quiz consists of 20 true or false questions. If the student guesses on each question what is the…

A: Solution: Let X be the number of correct answers and n be the number of questions. Since the…

Q: a department store has daily mean sales of $28,372.72. The standard deviation of sales is $2000. On,…

A: The mean and standard deviation of daily sales is : x=$28372.72s=$2000 For Tuesday, the sales were…

Q: A biologist found the wingspan of a group of monarch butterflies to be normally distributed, with a…

A: A biologist found the wingspan of a group of monarch butterflies to be normally distributed, with a…

Q: Suppose the scores of students on an exam are normally distributed with a mean of 276 and a standard…

A: X~N(μ= 276 , σ= 59 ) μ= 276 , σ= 59 Formula for Z-score Z=(X-μ)/σ

Q: Suppose you found that the average sea- faring bird can fly 8,000 km without stopping. The wandering…

A:

Q: The heights of adult men in America are normally distributed, with a mean of 69.5 inches and a…

A: 69.5 2.62 64.4 2.53 American woman:

Q: If there is a small amount of variation, then the standard deviation is what

A: Standard deviation: It is defined as the positive square root of the variance. It fulfils requisites…

Q: If on an average 8 ships out of 10 arrive safely at a port, find the mean and standard deviation of…

A:

Q: In a random sample of 48 people, the mean body mass index (BMI) was 28.3 and the standard deviation…

A: Given that Random sample size(n) =48 Mean body mass index (x¯)=28.3 Sample standard deviation (s)…

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given, final exam score follows normal distribution mean 73 and standard deviation 8. Grades are…

Q: The average price of an instrument at a small music store is $345. The standard deviation of the…

A:

Q: According to the National Association of Colleges and Employers, the 2015 mean starting salary for…

A: (d) Determine the new college graduate in business have to earn in dollars in order to have a…

Q: The salaries of 300 employees of a certain factory in Baguio City have a mean of P6,500 and a…

A:

Q: The height of adult men in the United States is normally distributed with a mean of 70 inches and a…

A: Z = -0.67 Mu = 70 S = 3

Q: The heights of adult men in America are normally distributed, with a mean of 69.1 inches and a…

A:

Q: 95% of 80 night students scored between 70% and 80% on a quiz. If this data is normally distributed,…

A: Given: Total number of students n=80.             let X  denote the marks of students then,  X ~N(µ,…

Q: e heights of adult men in the United States are normally distributed with a mean of 70 inches and a…

A: Given: μ=70, σ=2.5 The corresponding z-value needed to be computed: The probability that men in US…

Q: Adult Golden Retrievers have a mean weight of 64 pounds with a standard deviation of 8 pounds. If…

A: In this scenario, it is known that the  mean weight is 64 pounds with a corresponding standard…

Q: For a recent "Smartest State in America" article, a journalist wants to know how many people with a…

A: The mean is 5,000,000 and the standard deviation is 450,000.

Q: For a certain species of snake, the mean length of an adult is 63.4 cm with a standard deviation of…

A:

Q: If the average salary of a computer programmer is $71, 800 with a standard deviation of 13, 000,…

A: I am attaching image so that you understand each and every step.

Q: A department store has daily mean sales of $ 28,372.72. The standard deviation of sales is $2000. On…

A: Given information- Mean sales, μ = $ 28,372.72 Population standard deviation, σ = $2000 Tuesday’s…

Q: Assume that the test scores from a college admissions test are normally distributed, with amean of…

A:

Q: The weights of oranges in a harvest are normally distributed, with a mean weight of 150 grams and…

A: From the provided information, Mean (µ) = 150 Standard deviation (σ) = 10 Let X be a random variable…

Q: The average number of moves a person make in his/her lifetime is 12 and the standard deviation is…

A: Given,sample size(n)=25mean(μ)=12standard deviation(σ)=3.5

Q: Professor Ivy’s students have a Mean grade of 69.5 and a Standard Deviation of 6.5.  If Johnny has…

A: From the provided information, Mean (µ) = 69.5 Standard deviation (σ) = 6.5 Let X be a random…

Q: Suppose that the mean retail price per gallon of regular grade gasoline in the United States is…

A: Given,mean(μ)=$3.41Standard deviation(σ)=$0.10

Q: If a population has a standard deviation σ , then the standard deviation of the mean of 100 randomly…

A:

Q: Statewide, the population as a whole watches 6.2 hours of TV per day. A random sample of 1017 senior…

A: Given data is appropriate for testing of hypothesis to test z-test for single mean because it is a…

Q: brazil spends 6.24% of its GDP on education, calculate the z-score for brazil. miu = 4.8% and the…

A: It is given that Mean = 4.8 SD = 1.66 And value X = 6.24

Q: According to a Human Resources report, a worker in the industrial countries spends on average 419…

A: Solution

Q: A particular fruits weights are normally distributed, with a mean of 797 grams and a standard…

A: Let us assume X= weight of a particular fruit Given that X follows a normal distribution with mean=…

Q: In order to determine the average weight of carry-on luggage by passengers in airplanes, a sample of…

A: 1.   From the given information, the sample size is 250.  The population standard deviation is 2.5.…

Q: A history class has 75 members.  If there is a 12% absentee rate per class meeting , find the…

A: Given data  P(absent) = p = 0.12  So q= 1-p = 0.88 Sample size (n)= 75 X = no.  of student absent We…

Q: 1. There are 95% of students at school weigh between 62 kg and 90 kg at Westchester Community…

A: 95% of the data lies between X¯-1.96×σ and X¯+1.96×σ hence we get, X¯-1.96×σ = 62 X¯+1.96×σ = 90…

Q: The heights of adult men in America are normally distributed, with a mean of 69.3 inches and a…

A: Let "x" be the height of a man.

Q: The heights of adult men in America are normally distributed, with a mean of 69.3 inches and a…

A:

Q: If the average height of all women is 63.5 inches and the standard deviation is 2.5 inches,…

A:

Q: In an all boys school, the heights of the student body are normally distributed with a mean of 71…

A:

Q: Suppose that water usages in American showers are normally distributed, with an average shower using…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: Which would you expect to be the larger standard deviation: the standard deviation of the weights of…

A: Consider,  the standard deviation of the weights of 25 students in a first-grade class, or the…

Q: average GPA of 2.78 with a standard deviation of 0.45.

A: Given that  GPA is normally distributed . A sample of university students has an average GPA of 2.78…

Q: The average weight of dogs that come to a certain vet's office is 55.6 pounds, with a standard…

A: Solution-: Given: μ=55.6,σ=2.2 We find, P[dog weight more than 60 pounds]=?

Q: In a certain​ city, the average​ 20- to​ 29-year old man is 72.5 inches​ tall, with a standard…

A:

Q: If the foot length of women follows a normal distribution and 95% of women have a foot length…

A: Given data: If the foot length of women follows a normal distribution 95% of women have a foot…

Q: The average register transaction at a local coffee house is 6.17 with a standard deviation of 3.25.…

A: Standard normal distribution:The standard normal distribution is a special case of normal…

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given, Mean = 71 SD = 8

Q: If the standard deviation of a sample is 4.3 for 28 data values, what would the standard deviation…

A: