The empirical rule relates the standard deviation of a population to the probability of where a data point will fall on a normal curve. O True O False
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Q: Assume that adults have IQ scores that are normally distributed with a mean of μ=105 and a standard…
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A: Given that Mean = 8 Standard deviation = 2 Find P(X = 8 )
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
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Q: Assume that adults have IQ scores that are normally distributed with a mean of μ=105 and a standard…
A: given datanormal distributionμ= 105σ = 15P(x<120) = ?
Q: A normal distribution curve has an egg shape when plotted. O True O False
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A: given data normal distributionμ = 89σ = 24P(53<x<125) =?
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- 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?You play a game of chance that you can either win or lose (there are no other possibilities) until you lose. Your probability of losing is p = 0.61. What is the probability that ita. takes 2 games until you lose. b. takes 5 games until you lose. c. Find the mean c. Find the standard deviation.The Intelligence Quotient (IQ) test scores for adults are normally distributed with a population mean of 100 and a population standard deviation of 20. What is the probability we could select a sample of 80 adults and find the mean of this sample is less than 95? 0.0125 0.9750 0.4875 0.9476
- On average, Upstate Chevrolet sells 20 cars each week, with a standard deviation of 2. How many cars sold represents 2 standard deviations above the mean? Answer How many cars sold represent 1 standard deviation below the mean? Answer Approximately 68% will fall between Answer and Answer . Approximately 99.7% will fall between Answer and Answer . What is the probability that the car lot will sell at least 18 cars? Answer % What is the probability that a car lot will sell at most 26 cars? Answer %A population has a mean of 90 and a standard deviation of 10. A sample of 100 observations will be taken. The probability that the mean from that sample will be less than 92 isAssume that adults have IQ scores that are normally distributed with a mean of μ=105 and a standard deviation σ=15. Find the probability that a randomly selected adult has an IQ between 90 and 120. Click to view page 1 of the table. LOADING... Click to view page 2 of the table. LOADING... Question content area bottom Part 1 The probability that a randomly selected adult has an IQ between 90 and 120 is enter your response here. (Type an integer or decimal rounded to four decimal places as needed.)
- Cody took his first physics exam and scored an 80. The population mean for this exam is 70, and the standard deviation is 5. What is the probability of selecting a person with a score greater than Cody’s?Repair Cost for Microwave Ovens The average repair cost of a microwave oven is $55, with a standard deviation of $8. The costs are normally distributed. Find the probability that the mean of the repair bills will be greater than $70.Money people carry into the store is normally distributed with a mean of $258 dollars and a standard deviation of $35. In a sample of 76 Americans who walked into that store find the probability that a random customer will have more than $260 in his or her wallet. a. 0.8819 b. 0.9938 c. 0.2615 d. 0.3091 e. 0.3467
- For a specific year. Americans spent an average of $52 for ice cream. The amount spent is normally distributed and the standard deviation is $7.50. Find the probability that a randomly American spent more than $47 per year on ice cream. Show work. __________ If 1200 Americans were randomly selected, about how many would you expect to have spent less than $47 per year on ice cream? Show your work. ________Solve the problem.Assume that male Siberian huskies' weights are normally distributed with a mean of 63.6 pounds and a standard deviation of 2.5 pounds. If 90 male Siberian huskies are randomly selected, find the probability that they have a mean weight between 62.9 pounds and 64.0 pounds.Costs for standard veterinary services at a local animal hospital follow a Normal distribution with a mean of $88 and a standard deviation of $24. What is the probability that one bill for veterinary services costs between $42 and $133?