What probability falls within one standard deviation of the mean?
Q: New York City is the most expensive city in the US for lodging. The mean hotel room rate is $204 per…
A: given datanormal distributionμ = 204σ = 55P(x>225) = ?
Q: The number of miles a certain brand of tires lasts is normally distributed with a mean of 30,000…
A: The mean of the certain brand of tires lasts is 30,000 miles. The standard deviation of the certain…
Q: Bottled Drinking Water Americans drank an average of 23.2 gallons of bottled water per capita in…
A:
Q: 2. During my office hours (from 12pm to 6pm), an average of about 2 student per hour comes in for…
A: During my office hours (from 12 pm to 6 pm), an average of about 2 students per hour come in for…
Q: Adult male heights have a normal probability distribution with a mean of 70 inches and a standard…
A:
Q: Watch your cholesterol: The National Health and Nutrition Examination Survey (NHANES) reported that…
A: Given information Mean (µ) = 202 Standard Deviation (σ) = 41 Sample size (n) = 110
Q: Explain in detail what a normal probability plot is and how it is used to assess the normality of a…
A: Normal probability plot:The plot for the observed values of a variable versus the normal scores is…
Q: The average sales price of a single-family house in the United States is $235,500. You randomly…
A: Given, Mean μ=235500 Standard deviation σ=50000 x=225000
Q: Given the mean is 120 minutes and the standard deviation is 30 minutes. What is the probability that…
A: The mean is 120 minutes and standard deviation is 30 minutes.
Q: You randomly select 25 teachers. What is the probability that their mean salary is more than $70000,…
A: Given thatRandomly select 25 teachersPopulation mean salary is 56000Standard deviation 15000To…
Q: An insurance salesperson sells an average of 4.90 policies per day. Let x denote the number of…
A:
Q: A research firm conducted a survey to determine the average amount of money consistent smokers spend…
A: We have given that, Let X be a random variable from normal distribution with mean(μ) = 20 and…
Q: Not everyone pays the same price for the same model of car. The mean is $22,000 and the standard…
A: Let us denote X= price of a carGiven that X follows a normal distribution with mean=22000 and…
Q: The mean of a normal probability distribution is 600; the standard deviation is 20. Practically all…
A:
Q: you investigate the earnings of a financial advisor in a wealth management company. they earn on…
A: the PDF of normal distribution is = 1/σ * √2π * e ^ -(x-u)^2/ 2σ^2standard normal distribution is a…
Q: When parking a car in a downtown parking lot, drivers pay according to the number of hours or…
A: Standard deviations=σ=2.8532 k=3.25
Q: The mean GPA of university students is 2.3 with a standard deviation of 1.2. If you were to draw 36…
A:
Q: Cody took his first physics exam and scored an 80. The population mean for this exam is 70, and the…
A: Solution: It is given that, Population mean, 70 Standard deviation, 5 Given that Cody took his first…
Q: Empirical probabilities are deeply rooted in probability. essentially percentages based on a large…
A: Empirical probability or experimental probability is determined how often an event has been observed…
Q: Derive the mean and variance of the t distribution.
A: Given that We have to derive the mean and variance of t distribution:
Q: The population mean annual salary for an electrician is $46,700.A random sample of 42 electricians…
A:
Q: We want to estimate the mean of a population. A random sample of subjects is selected and the sample…
A: From the provided information, Standard error (SE) = 1.8
Q: coming up. Suppose the exam scores are normally distributed with a population mean of 70% and a…
A:
Q: A client has an investment portfolio whose mean value is equal to $1,000,000 with a standard…
A: A client has an investment portfolio whose mean value is equal to $1,000,000 with a standard…
Q: The mean of a normal probability distribution is 600; the standard deviation is 20. About 68% of…
A: given data normal distribution population mean = 600 population sd = 20
Q: The average sales price of a single-family house in the United States is $235,000. You randomly…
A: Given, Mean sales price of family in US is $2,35,000 Standard deviation is $50,000 I.e.,…
Q: Billiard tables have mean degree of balance 0 and standard deviation 1. What is the probability…
A: It is given that the degree of balance is normally distributed with mean 0 and standard deviation is…
Q: find the mean and standard deviation of the number of heads obtain
A: Let q be the probability of obtaining tail and p be the probability of obtaining head. Probability…
Q: A final exam in science 160 has a mean of 73 with a standard deviation of 7.8. If 25 students are…
A: Given information- Population mean, µ = 73 Population standard deviation, σ = 7.8 Sample size, n =…
Q: The length of time students needed in order to complete a statistics test followed a distribution…
A: Given Mean, μ =74 Standard deviation, σ = 8 Let X be the length of time students needed to…
Q: Resting body temperatures are normally distributed with an average of 98.25 degrees Fahrenheit and a…
A: Let X be the random variable for body temperatures. X~Nμ, σ Where, Mean, μ= 98.25Standard deviation,…
Q: A normal population had a mean of 70 and a standard deviation of 12. You select a random sample of…
A: μ = 70σ = 12n = 9P(x¯>73) = ?
Q: ou go to see eight movies every year and win whenever nobody talks. The long-term probability of…
A: Given data, n=8 p=0.3
Q: A sniper hits a target 80% of the time. He fires five shots at the target. Find A. Probability…
A: Given problem is binomial distribution Let X: No. of hits n=No. of shots at the target=5 p=prob. of…
Q: 1. A survey found that the American family generates an average of 17.2 pounds of glass garbage each…
A: Given Population mean μ=17.2, population standard deviations σ=2.5, n=55 Note: This probability…
Q: 2. Fill in the blanks: A standardized variable always has a mean of O and a standard deviation of…
A: 2. A standardized variable is always has mean 0 and standard deviation of 1.
Q: normal population had a mean of 70 and a standard deviation of 12. You select a random sample of 9.…
A: given data normal distributionμ = 70σ = 12n = 9 P(x¯<66) = ?
Q: The mean of a normal probability distribution is 500; the standard deviation is 10. About 68% of…
A:
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- Costs for standard veterinary services at a local animal hospital follow a Normal distribution with a mean of $89 and a standard deviation of $24. What is the probability that one bill for veterinary services costs between $53 and $125?The probabilities that a person is receiving a chat message 0, 1, 2, 3, 4, or 5 per day are the following: 0.08, 0.19, 0.36, 0.25, 0.07, and 0.05. Find the mean, variance, and standard deviation and interpret the results.Solve the problem.Assume that mountain lions' weights are normally distributed with a mean of 62.6 kilograms and a standard deviation of 2.6 kilograms. If 70 mountain lions are randomly selected, find the probability that they have a mean weight between 61.9 kilograms and 62.8 pounds.
- Billiard tables have mean degree of balance 0 and standard deviation 1. What is the probability that the degree is 0.01.Costs for standard veterinary services at a local animal hospital follow a Normal distribution with a mean of $74 and a standard deviation of $22. What is the probability that one bill for veterinary services costs between $41 and $107?The number of hours it takes for symptoms of a viral disease to show from the time of infection follows a normal distribution with mean 175 hours and standard deviation of 25 hours. Find the probability that randomly selected person who has just been infected will not display any symptoms until after 188 hours. A. 0.0047 B. 0.3015 C. 0.6985 D. 0.9953
- According to Sallie Mae surveys and Credit Bureau data, college students carried an average of $3173 credit card debt in 2008. Suppose the probability distribution of the current credit card debts of all college students in the United States is unknown but its mean is $3173 and the standard deviation is $750. Let x be the mean credit card debt of a random sample of 400 U.S. college students. (a) What is the probability that the mean of the current credit card debts for this sample is within $70 of the population mean?A professor knows that her statistics students' final exam scores have a mean of 79 and a standard deviation of 12.4. In his class, an "A" is any exam score of 90 or higher. This quarter she has 25 students in her class. What is the probability that 7 students or more will score an "A" on the final exam?What is probability and how is it related to the normal distribution?
- Paragraph Styles 5. Jimmy has an unfair coin that he flips and it lands on heads 75% of the time. If he flips this coin four times, what is the probability that he will get only 1 heads? What is the mean for number of heads? Variance? Standard Deviation? acerPlease explain. Thanks.A professor of statistics noticed that the marks in his course are normally distributed. He also noticed that his morning classes average 73% with a standard deviation of 12% on their final exams. His afternoon classes average 79% with a standard deviation of 11%. A. What is the probability that a randomly selected student in the morning class has a higher final exam mark than a randomly selected student from an afternoon class? Probability = B. What is the probability that the mean mark of four randomly selected students from a morning class is greater than the average mark of four randomly selected students from an afternoon class? Probability =
