The average teacher’s salary in Connecticut (ranked first among states) is $58,698. Suppose that the distribution...
The average teacher’s salary in Connecticut (ranked first among states) is $58,698. Suppose that the distribution of salaries is normal with a standard deviation of $7,500
a. What is the probability that a randomly selected teacher makes less than $52,000 per year?
b. If we sample 100 teachers’ salaries, what is the probability that the sample mean is less than $56,000?
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The average teacher’s salary in Connecticut (ranked first among
states) is $58,698. Suppose that the distribution...
3. Normal Distribution for the sample means. The average teacher's salary in New Jersey (ranked first...
3. Normal Distribution for the sample means. The average teacher's salary in New Jersey (ranked first among states ) is $52174. Suppose that the distribution is normal with a standard deviation equation to $7500. If we sample 100 teachers' salaries , what is the probability that the sample mean is less than $50000?
In Minnesota, K-12 substitute teachers who work whenever asked earn an average yearly salary of...
In Minnesota, K-12 substitute teachers who work whenever asked earn an average yearly salary of $6,000 for teaching. If the distribution of salaries is approximately normal with a standard deviation of $1,000, what is the probability that a randomly selected K-12 substitute teachers makes the following: More than $9,000 a year. b) Between $3,000 and $5,000 a year.
assume the salaries of elementary school teachers in the United States normally distributed with a mean...
assume the salaries of elementary school teachers in the United States normally distributed with a mean of 32,000 and a standard deviation of 3,000. If 100 teachers are randomly selected, find the probability that their mean salary is less than 32,000
26. The population mean annual salary for flight attendants is $56,275. Assume annual salaries for flight...
26. The population mean annual salary for flight attendants is $56,275. Assume annual salaries for flight attendants are normally distributed, with a standard deviation of $1,720. We are flying from Las Vegas to Los Angeles, and we randomly select one flight attendant on our flight and ask him about his annual salary. What is the probability that this randomly selected flight attendant makes an annual salary less than $57,500? We randomly sample 30 flight attendants. What is the probability that...
Assume that the salaries of elementary school teachers in the United States are normally distributed with...
Assume that the salaries of elementary school teachers in the United States are normally distributed with a mean of $32,000 and a standard deviation of $3000. If 100 teachers are randomly selected, find the probability that their mean salary is greater than $32,500.
assume that the salaries of elementary school teachers in the United States are normally distributed with...
assume that the salaries of elementary school teachers in the United States are normally distributed with a mean of $32,000 and a standard deviation of $3,000. If 100 teachers are randomly selected, find the probability that their mean salary is greater than $32,500
2. Suppose vitamin D levels among adults 20 and older in the U.S has a Normal...
2. Suppose vitamin D levels among adults 20 and older in the U.S has a Normal distribution with population mean 60 µmol/L and a population standard deviation of 25 µmol/L. What is the probability that a sample mean of 25 randomly selected people is less than 30 µmol/L (assume population standard deviation is 30 µmol/L).
SExercises 6-2 1. Automobile Workers A worker in the automobile industry works an average of 43.7...
SExercises 6-2 1. Automobile Workers A worker in the automobile industry works an average of 43.7 hours per week. If the distribution is approximately normal with a standard deviation of 1.6 hours, what is the probability that a randomly selected automobile worker works less than 40 hours per week? 2. Teachers' Salaries The average annual salary for all U.S. teachers is $47,750. Assume that the distribution is normal and the standard deviation is $5680. Find the probability that a randomly...
Problem 2 Salaries for new assistant professors at State College are normally distributed with a mean...
Problem 2 Salaries for new assistant professors at State College are normally distributed with a mean of $80000 and a standard deviation of $7000 We randomly survey 20 teachers from that district, let X be the salary of a randomly selected teacher at State, and let X be the average salary of 20 randomly selected teachers bxpan a.(3%)X~ b, (3%)8~ (3%) Normal Norma, D Find the probability that an individual teacher earns more than $65,000. P(X> 65000) d. (3%) Find...
Suppose that the data concerning the first-year salaries of recent graduates is normally distributed with the...
Suppose that the data concerning the first-year salaries of recent graduates is normally distributed with the population mean μ= $60000 and the population standard deviation σ = $15000. a. Find the probability of a randomly selected recent graduate earning less than $45000 annually. b. Find the probability of randomly selecting a recent graduate that makes more than $80000 a year, given the same normal distribution. c. Find the range of annual salaries of the top 15% earners, given the same...
3. Normal Distribution for the sample means. The average teacher's salary in New Jersey (ranked first among states ) is $52174. Suppose that the distribution is normal with a standard deviation equation to $7500. If we sample 100 teachers' salaries , what is the probability that the sample mean is less than $50000?
SExercises 6-2 1. Automobile Workers A worker in the automobile industry works an average of 43.7 hours per week. If the distribution is approximately normal with a standard deviation of 1.6 hours, what is the probability that a randomly selected automobile worker works less than 40 hours per week? 2. Teachers' Salaries The average annual salary for all U.S. teachers is $47,750. Assume that the distribution is normal and the standard deviation is $5680. Find the probability that a randomly...
Problem 2 Salaries for new assistant professors at State College are normally distributed with a mean of $80000 and a standard deviation of $7000 We randomly survey 20 teachers from that district, let X be the salary of a randomly selected teacher at State, and let X be the average salary of 20 randomly selected teachers bxpan a.(3%)X~ b, (3%)8~ (3%) Normal Norma, D Find the probability that an individual teacher earns more than $65,000. P(X> 65000) d. (3%) Find...
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