For a normally distributed random variable with mean is 44 and standard deviation is 15, Find the Z score for a raw score (x) of 42, which is form this population. Z score =, (Round to 3 decimals as needed) …..

Q: e scores on a test are normally distributed with a mean of 150 and a standard deviation of 30. What…

A: Solution:  Let X be the score on test are normally distributed with mean 150 and standard deviation…

Q: the mean is 146, and standard deviation is 35. A score of 251 is how many z-scores above the mean?

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Q: The mean number of customers arriving at a restaurant during a 15-minute period is 13. Find the…

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Q: lease check if my answers are correct. The given is the first two columns while my answers are in…

A: answers

Q: The annual salary for one particular occupation is normally distributed, with a mean of about…

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Q: The first three moments of a distribution about the value 2 are 1, 16 and-40 show that the mean is…

A:

Q: Find the z-score for the value 69, when the mean is 96 snd the standard deviation is 5. z-score= ?

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Q: For a distribution the mean is 10, variance is 16, y, is +1 and B, = 4. Obtain the first four raw…

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Q: If the normal length of eels is between 32 cm and 60 cm, what percentage of eels fall within this…

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Q: A normal distribution has a mean of u = 100 with o = 20. If one score is randomly selected from this…

A: The random variable X follows normal distribution. The population mean is 100. The population…

Q: (a) If an FEV of less than 2.5 L is regarded as showing some functional impairment (occasional…

A: Given: Non-smoking man: Mean μ=4.1 Standard deviation σ=0.5   Smoking man: Mean μ=3.9 Standard…

Q: e gas mileage of a certain vehicle make has a normal distribution such that N(25,3). Find the gas…

A: N [25,3]The population mean = 25The population standard deviation = 3

Q: The annual salary for one particular occupation is normally distributed, with a mean of about…

A: Given: The sampling distribution of mean is =$126,000 Standard deviation = $18000 sample = 30

Q: This is a normal distribution problem The amount of time that people spend at Grover Hot Springs is…

A: Draw the normal curve and shade the area of 0.25 to the left of z under the normal curve. Use excel…

Q: Mr. Jackson is looking at test scores for his Algebra 2 class. The scores on the Unit 2 Test follow…

A: The percent of learners scored 86 or better is,

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

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Q: IQ test scores are normally distributed with a mean of 99 and a standard deviation of 11. An…

A: IQ test scores are normally distributed with a mean of 99 and a standard deviation of 11. An…

Q: Given independent random variables with means and standard deviations as shown, find the mean and…

A: As per the Bartleby guildlines we have to solve first question and rest can be reposted.... Given…

Q: sample of 100 observations was taken from a large population. The sample mean and the variance was…

A: Solution: Given information: n= 100  Sample size x=80  Sample mean s2=144 Sample variance s=s2s=…

Q: The amount that households pay service providers for access to the Internet varies quite a bit, but…

A: We have given that  We have given that.   X~N( μ , ?^2 )   μ =48 , ? =20 , n=500

Q: (b) Consider, the number of family members in your family, as a population and their weight as a…

A: b. The number of members in my family is 4.  Let X denote the weights of family members. The weights…

Q: A random variable is not normally distributed, but it is mound shaped. It has a mean of 18 and a…

A: GivenMean(μ)=18standard deviation(σ)=2sample size(n)=40

Q: Mrs. Santos administered a Science Achievement Test to a random 45 graduating SHS students. In this…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: data items is normally distributed with a mean of 900and a standard deviation of 30. Find the data…

A: Given that  Z=2.5 , μ = 900 , σ = 30

Q: The distribution of certain test scores is a nonstandard normal distribution with a mean of 50 and a…

A: The Z score is standard normal variable with mean 0 and standard normal 1

Q: To qualify for a police academy, applicants are given a test of physical fitness. The scores are…

A: Let X denote the scores and it follows normal distribution with a mean of μ=63 and a standard…

Q: for the above i got the mean of 1, can you help me w the standard deviation and the variance

A: From the above parts Here we have Since, X ~ Binomial (n = 3 , p = 1/3)  Therefore, n = 3 , p = 1/3…

Q: average marks obta follows Section Average marks No. of students Find combined mean. by the students…

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Q: for a population with a standard deviation of 10 and mean of 100, draw a bell shaped curve, marking…

A: We have to draw bell shaped curved and marking location of the mean and standard deviation..

Q: planet far far away from Earth, IQ of the ruling species is normally distributed with a mean of 100…

A: On a planet far far away from Earth, IQ of the ruling species is normally distributed with a mean of…

Q: eve the claim is incorrect and find andom sample of 5 cars has a mean gas mileage of 24 mpg and a…

A: Assuming that population is normally distributed, let Xi be the random sample drawn from normal…

Q: On a planet far far away from Earth, IQ of the ruling species is normally distributed with a mean of…

A: The provided information are: Population meanμ=112Standard deviationσ=17 Consider X be a random…

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: The average American man consumes 9.5 grams of sodium each day. Suppose that the sodium consumption…

A: Let X = the amount of sodium consumed. Round all numeric answers to 4 decimal places where possible.…

Q: A random variable is not normally distributed, but it is mound shaped. It has a mean of 18 and a…

A: given data population mean ( μ ) = 18population sd ( σ ) = 2sample size (n) = 13find mean of the…

Q: Q1. Find mean, Variance and standard deviation for the distribution X 6 7 8 10 0.2 0.4 0.1 0.1 5…

A: From the provided information,The probability distribution is as follow:X5678910P…

Q: Use the 95 % rule and the fact that the summary statistics come from a distribution that is…

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

A: Here the given table is : Age males…

Q: On average indoor cats live to 14yrs oldvwith a standard deviation of 2.4 yrs.Suppose the…

A: It is given that the mean is 14 and the standard deviation is 2.4.

Q: A normal distribution has mean u = 56 and standard deviation o = 20. Find and interpret the z-score…

A: Given : Let X follows normal distribution with Mean (μ) = 56Standard deviation (σ) = 20i.e X~N(μ =…

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

A: The z-score:The z-score of a normally distributed random variable, X, with mean μ and standard…