The mean weight of 500 male students in a certain college is 151 Ibs. and the standard deviation is 15 Ibs. Assuming the weights are normally distributed find how many students weigh: (a) between 120 and 155 Ibs, and (b) more than 185 lbs.

Q: In a survey, the mean weight of 1026 rats was calculated to be 132 gr. The standard deviation of the…

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Q: Male and female populations of tortoises under 80 years old are represented by age in the table…

A: Here the given table is : Age males females…

Q: The mean life of pairs of shoes is 40 months with a standard deviation of 8 months If the life of…

A: The random variable X is the life of shoes It is normally distributed. The mean life of the pair of…

Q: When the coefficient of variation is equal to 20% and the standard deviation is equal to 5, then the…

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Q: A variable is normally distributed with mean 10 and standard deviation 3. Find the percentage of all…

A: Given  μ =10,σ=3 X~N(μ =10,σ2 =32)  We want to find the probability  P(73<X<80)= ?  Note: This…

Q: Assume that the number of pieces per bag has a mean of 264 with a standard deviation of 3. use the…

A: Given :  the number of pieces per bag has a mean of , μ=264  a standard deviation of , σ =3   We…

Q: Scores on a test have a mean of 86 and a standard deviation of 13. Jerrica has a score of 94.…

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Q: what is the approximate number of students taking the exam?

A: given: Grades follow Normal with u= 75 and σ= 8 12 students got more than 90.…

Q: Assume that the readings at freezing on a bundle of thermometers are normally distributed with a…

A: We have given that  The readings at freezing on a bundle of thermometers are normally distributed…

Q: Blood pressure is distributed Normally, with a mean of 85 mm and a standard deviation of 20 mm.…

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Q: an =125 and standard deviation a= 14. d the 80th percentile of the distribution of systolic blood…

A: Let x denote the systolic blood pressure of males . Here x is approximately normally distributed…

Q: he scores on a psychology examination are normally distributed with a mean of 70 and a standard…

A: Solution:  Let X be the scores on psychology examination are normally distributed with mean of μ= 70…

Q: According to a survey, the average base salary for women in sales is higher than the average base…

A: It is given that the average base salary for women is $5800 per month. Thus, the average salary for…

Q: particular fruit's weights are normally distributed, with a mean of 395 grams and a standard…

A: We have given that Mean=395

Q: have a mean GPA of 2.57 with a standard deviation of 0.71. how many of the 850 new students have a…

A: Given that.   X~N( μ , ?)   μ=2.57   , ?=0.71    Z-score =( x - μ )/?

Q: Refer to the accompanying table, which describes results from groups of 8 births from 8 different…

A: Solution-: Given probability distribution: Let, X=The number of girls among 8 children X P(X)…

Q: In a population of exam scores, a score of X = 88 corresponds to z = 2 and a score of X = 79…

A: From the provided information, A score of X = 88 corresponds to z = 2 A score of X = 79 corresponds…

Q: weighs 170 lbs with a standard deviation of 8 lbs and the average female tennis player weighs 125…

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Q: The average temperature in a town in January is 22.1 oF and the standard deviation is 7.5 pF. What…

A: we have to find average temperature  in Celsius  from given data. given data : mean = 22.1.of…

Q: In a factory, packs of sweets are supposed to contain 1kg each. In reality, the weights are normally…

A: Let X be the weight following normal distribution .

Q: Suppose that weights of 5th grade elementary girls are normally distributed with mean µ = 64 lbs and…

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Q: Consider again the birth weights of newborn babies, where the mean weight is 3290 grams and the…

A: From the provided information,Mean (µ) = 3290Standard deviation (σ) = 520X~N (3290, 520)

Q: Blood pressure is distributed Normally, with a mean of 85 mm and a standard deviation of 20 mm.…

A: The objective of this question is to find the fraction of the population that has a blood pressure…

Q: How does the median birth weight compare to the average birth weight?

A: Given that birth weights of children born in the United States are normally distributed with mean =…

Q: In a survey, the mean weight of 1005 rats was calculated to be 132 gr. The standard deviation of the…

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Q: A professor gives a test to her calculus students. The scores are approximately normally distributed…

A: The normal distribution is the most useful theoretical distribution for continuous variables.…

Q: If the standard deviation of all dogs is 54 lbs, what is the standard deviation of the average…

A: Given,σ=54n=110σx=?

Q: To assess the air quality in a surgical suite, the presence of colony-forming spores per cubic meter…

A: {12,24,30}

Q: Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean…

A:

Q: In a survey, the mean weight of 1032 rats was calculated to be 132 gr. The standard deviation of the…

A: Given data,n=1032μ=132s=3P(X<124.5<X<139.5)=?