Determine the probability of seeing a Z score of 2.699 or one with a larger absolute value.

Q: hat is the Normal Distribution Probability where X is more than 268.66 for a mean of 145, and…

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Q: The number of students, in a class of 35, who improve their score from the first midterm to the…

A: Since we know that discrete variable : A variable which takes particular value , generally integral…

Q: Mean 255, x is 230 and z score is -2 find standard deviation

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Q: The heights of 18-year-old men are approximately normally distributed, with a mean of 68 inches and…

A: Given data,μ=68σ=3If n=9P(67<X<69)=?

Q: The mean is 15.2 and the standard deviation is 0.9. find the probability that X is greater than 17.

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Q: Find the probability that x is greater than 15.2 when the mean is μ = 15.2 and the standard…

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Q: What is the percentage of scores that lie between a z score of -2 and a z score of 1?

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Q: what will be the value of X at the z score =-2.5 given, mean=45 and standard deviation =5?

A: Mean = 45 Standard deviation = 5  Z score =-2.5 We have to find X score  for given data...

Q: What information is provided by the sign (+/–) of a z-score? What information is provided by the…

A: Let, the dataset scores have a mean µ and standard deviation σ. Then the z score of a given score ,…

Q: The chloride concentration in the blood (mmol / liter) averages 104 with a standard deviation of 5.…

A: Given Data: Let X represent the random variable   X~ Normal (104, 52) n=200 Therefore, X¯ ~ Normal…

Q: For a binomial distribution, the mean is 6 and the standard deviation is 2. Write out all the terms…

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Q: The random variable X represents the average number of texts a teenager sends, where the…

A: Given, μ = 450σ = 150To find,P (X > 700) = ?

Q: The mean is µ = 60.0 and the standard deviation is Η = 4.0.Find the probability that X is less than…

A: Given datamean (µ) = 60.0 standard deviation (σ) = 4Assuming X follows normal…

Q: If a z-score is 0, it is on the mean. True or False

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Q: A group of data has a mean of 65 with a standard deviation of 5. What z-score is possible if the…

A: According to the provided information,

Q: Find the proportion of Normally distributed observations with a z-score below 2.56. Give your answer…

A: Given Z=2.56

Q: The mean and variance of a binomial distribution are 9 and 6 respectively. Find the value of n.…

A: Note: Please repost 2nd question as i can answer only 1 question as per my policy.   1) Given data,…

Q: The mean is μ=60.0 and the standard deviation is σ=4.0. Find the probability that X is less than…

A: From the provided information,

Q: Assume that scores on a bone mineral density test are normally distributed with a mean of 0 and a…

A: GivenIt follows normal distribution with mean 0 and standard deviation 1For a randomly selected…

Q: Find the proportion of scores greater than 70 mean is 90 standard deviation is 10

A: The standard normal distribution:A continuous random variable Z is said to follow standard normal…

Q: The average score of this quiz is 24 points with a standard deviation of 1.5 points. What is the…

A: Let us assume that X=score of a quizX follows a normal distribution with mean=24 and standard…

Q: Assume that the readings on thermometers are normally distributed with a mean of 0 degrees Celsius…

A: We have given that Mu= 0 , sigma =1 X~ N ( 0, 1) Zscore=(x-mu)/sigma

Q: The probability that the mean height for the sample is greater than 65 inches is (Round to four…

A: It is given that  Mean, μ = 64.2 Sample size, n = 65 Standard deviation, σ = 2.55

Q: The mean always has a z-score (value) →

A: When the data is converted into z scores, the mean will always end up being zero.

Q: The College Board National Office recently reported that in 2011–2012, the 547,038 high school…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: What is the z-score of x = 11, if it is 2.5 standard deviations to the left of the mean?

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Q: The mean and variance of a binomial distribution are 8 and 4 respectively. Find the value of n.…

A: Binomial distribution allows us to compute the probability of observing a specified number of events…

Q: Assume that women's weights are normally distributed with a mean given by mean=143 lb and a standard…

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Q: What is the z-score of x = 9, if it is 0.133 standard deviations to the left of the mean?

A: Given X=9,

Q: z-score that is greater

A: we can assume it to be standard normal distribution with mean = 0 standard deviation = 1

Q: Find the proportion of Normally distributed observations with a zz-score above -2.84. Give your…

A: Given the proportion of Normally distributed observations with a z-score above -2.84

Q: The mean is μ =137 and the standard deviation is σ = 5.3, Find the probability that X is between…

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Q: The mean score on this test is: The midrange of scores on this test is:

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Q: What position [how many standard deviations] in the distribution corresponds to z-score of z= -1.00?

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Q: Find the probability that a single randomly selected salary that doesn't exceed 181000 dollars.…

A: The random variable X is defined as the salary for graduates which follows normal distribution with…

Q: What is the z-score of the 31st percentile?

A: The z-score for the 31st percentile is the value such that 31% of the area under the standard normal…

Q: Sixteen out of 35 high school seniors ran the mile in less than 6.25 minutes. At a=0.01, is there…

A: Solution: Give Total =60 X+ =35 remaing. X-=25 The test statistic is X = \min\{X^+, X^-\} =…

Q: the statistic X defined as X = 49S 2

A: (a) chi-square distribution with 49 degrees of freedom

Q: For example, let us assume that the mean quantity of cholesterol in eggs is 185 milligrams with a…

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Q: According to the Distribution of Z table, ______________ % of area is below a Z value of -1.16?

A: Z value = -1.16 Percentage of area that is below a Z value of -1.16 is given as,

Q: A mobile phone brand has a mean time of failure that equals to 1000 days. What is the probability…

A: Its exponential distribution

Q: The average speed of cars on 495 is 74 mph with a standard deviation of 6. What is the probability…

A: GivenMean(μ)=74standard deviation(σ)=6

Q: What is the z-score of x=9, if it's 1.5 standard deviations to the left of the mean

A: We have to find z value from given data

Q: After 5 points are added to every score in a distribution, the mean is calculated and found to be u…

A: After 5 points are added to every score in a distribution, the mean is calculated and found to be µ…

Q: A manufacturer of a low-tar cigarette claims that its cigarettes contain an average of 16.3 mg. of…

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Q: It is possible to score higher than 1600 on the SAT, but scores 1600 and above are reported as 1600.…

A: Obtain the Z-score for the random variable X equals 1600. The Z-score for the random variable X…

Q: what information is provided by the (+/-) of a z-score?

A: The z score tells us that the how far the mean is from the data point. The formula for z score is,…

Q: The mean is μ = 15.2 and the standard deviation is σ = 0.9 find the probability that X is greater…

A: Given,Mean (μ) = 15.2Standard deviation (σ) = 0.9

Q: Find the P-value in a test of the claim that the mean IQ score of acupuncturists is equal to 100,…

A: From the provided information, The mean IQ score of acupuncturists = 100 The hypotheses can be…

Q: If you roll one six-sided die and X = the # on the die.   What is the mean value of X?

A:

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.