Prothrombin time (PT) is a blood test that measures the time (in seconds) it takes for blood plasma to clot. In the general population, the average PT is 13 seconds, with a standard deviation of 0.3 seconds. The PT for 50 patients was tested. C alculate the standard deviation of the mean, rounded to 2 decimal places .

Q: Find the IQ Score.  IQ score  0.3446 Distributed with a mean of 100 and a standard deviation of 15.…

A: Given DataMean = 100Standard deviation = 15Probability of IQ score of adults = 0.3446

Q: A distribution of values is normal with a mean of 123.2 and a standard deviation of 62 Find P35,…

A: Given: A distribution of values is normal with  μ=123.2 , σ=62

Q: Test scores for a history class had a mean of 89 with a standard deviation of 8.9. Suppose a student…

A: According to the given information, we have Mean = 89 Standard deviation = 8.9 Raw score = 67

Q: Find the area of the shaded region. The graph to the right depicts IQ scores of adults in those…

A:

Q: Assume that weights of men are normally distributed with a mean of 160 pounds and a standard…

A: Given, Weights of men follows normal distribution with mean 160 pounds and standard deviation 25…

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A:

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A: From the provided information, Population mean (µ) = 190 pounds Population standard deviation (σ) =…

Q: A basketball player has a scoring average of 0.325 each week of the season, with a standard…

A: Given: μ=0.325σ=0.065

Q: IQ scores are normally distributed with a mean of 100 and standard deviation 16. Calculate the…

A: The question is about normal dist. Given : Popl. mean of scores ( μ ) = 100 Popl. std. deviation of…

Q: IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. Find the IQ…

A: Excel formula: =NORMINV(0.305,0,1)=-0.5100

Q: A consumer survey indicates that the average household spends μ = $185 on groceries each week. The…

A: From the provided information, Mean (µ) = $185 Standard deviation (σ) = $25 Let X be a random…

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A:

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Q: The mean grade on a statistics exam is/M=82, the standard deviation is=12. What actual grade has a…

A: The normal distribution  in the center are generally denser and basically less denser at tails.…

Q: A math class completes an exam and it is found that the class mean is 85 and the standard deviation…

A: The Chebyshev's theorem and Empirical rule is use to calculate the proportion or percentages of…

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A:

Q: The serum cholesterol level in men aged 18 to 74 are normally distributed with a mean of 178.1 and a…

A:

Q: the average grade is 84 with a standard deviation of 4. What is each grade for -1 2 0 1.5 -1.25

A: Given Mean μ=84Standard deviation σ=4 The formula for Z score isZ=X-μσX=Z×σ+μ

Q: Scores for professionals playing golf on an 18-hole golf course are normally distributed with a mean…

A: From the given information, Consider, X is scores for professionals playing golf on an 18-hole golf…

Q: In an Algebra class, the scores on a test are normally distributed. The middle 68% of the scores…

A: By empirical rule, 68% of data falls within one standard deviation. Thus, based on given info,…

Q: A distribution of values is normal with a mean of 163.1 and a standard deviation of 74.5.

A: From the given information, the mean is 163.1 and standard deviation is 74.5. Need to fine P12. That…

Q: In a normal distribution, find the mean when standard deviation is 6 and 3.75% of the area lies to…

A: From the provided information, Standard deviation (σ) = 6 3.75% of the area lies to the left of 85.…

Q: Plastic waste data lists weights of plastic discarded by households.The highest weight is 5.28lb and…

A: Highest= 5.28 Mean= 1.911 Standard deviation= 1.065 How many standard deviation is the difference=?

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A:

Q: The population mean of happiness is 5.382, with a standard deviation of 1.138. Linda has a z score…

A: We have given that,  Let X be a random variable following normal distribution with mean (Mu) = 5.382…

Q: scores on an english test are normally distributed with a mean of 31.5 and a standard deviation of…

A: X follows a Normal distribution with mean = 31.5 and S.D = 6.9 Then z=(x-mean)/SD = (x-31.5)/6.9…

Q: Test scores for the SAT are close to normal with an average of 850 and a standard deviation of 100.…

A: Given information: Mean SAT test scores μ=850 Standard deviation of SAT test scores σ=100 The SAT…

Q: A distribution of values is normal with a mean of 202 and a standard deviation of 91.5. Find P75,…

A: Obtain the score separating the bottom 75% from the top 25%. The score separating the bottom 75%…

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A: Given data normally distributed with mean = 500 and standard deviation = 100.Let ‘X’ be a normal…

Q: The weight of newborn babies is normally distributed, with a mean of 3.5 kilograms and a standard…

A:

Q: Suppose the mean length of songs played on a radio station is 190 seconds with a standard deviation…

A: