Let X follow a normal distribution with mean 5.3 and unknown standard deviation. If P(X < 11.6) = 0.9, what is the standard deviation?

Q: (a) Find the z-score for an IQ of 86, rounded to three decimal places.   (b) Find the probability…

A: mean = 100 s = 15

Q: On average, indoor cats live to 16 years old with a standard deviation of 2.7 years. Suppose that…

A: The indoor cats follow a normal distribution with mean , and standard deviation, . Hence, we can…

Q: Assume that z-scores are normally distributed with a mean of 0 and a standard deviation of 1. P(-b <…

A: Given information- We have given the z-scores are normally distributed with a mean of 0 and a…

Q: body temperatures of a group of healthy adults have a bell-shaped distribution with a mean of…

A: As per guideline expert have to answer first question only dear student please upload other…

Q: IQ s normally distributed with a mean of 100 and a standard deviation of 15. Suppose one individual…

A: GivenMean(μ)=100standard deviation(σ)=15

Q: H0:μ=58.455 H1:μ>58.455 Your sample consists of 46 subjects, with a mean of 58.8 and standard…

A: The random variable X is normally distributed. The sign of alternative hypothesis is greater than,…

Q: Many people believe that the average number of Facebook friends is 130. The population standard…

A: GivenMean(x)=140standard deviation(σ)=32sample size(n)=50α=0.01

Q: Suppose X is a non-standard normal variable, with a mean of 120, and std deviation of 9 (i.e.…

A:

Q: To estimate the mean score u of those who took the Medical College Admission Test on your campus,…

A: Given information: From the prior information, the scores are approximately Normal with a standard…

Q: ez-score for x = 61 is . So 61 is standard deviations (Choose one) ▼ the mean μ = 56. X

A: It is given thatMean, μ = 56Standard deviation, σ = 20Z-Score, Z = ( X - μ )/σwhere, Z be the…

Q: A sample of 3000 observations has a mean of 88 and a standard deviation of 13. The distribution is…

A: Solution :  Given:   n   = 3000 samples              x¯   = 88               s   = 13 For bell…

Q: The average number of moves a person makes in his or her lifetime is 12 and the standard deviation…

A: GivenMean(μ)=12standard deviation(σ)=3.5

Q: Corey scores X = 70 on his first exam, for which the entire class scored a mean of µ = 78 and…

A: From the given information, let X be the Corey’s score on his first exam. X = 70. Mean score of the…

Q: A test score of 48.4 on a test having a mean of 66 and a standard deviation of 11. Find the ​z-score…

A:

Q: Weights of bags of sugar, X in kilograms (kg), from a manufacturer, are normally distributed with a…

A: Answer:- Given, Weights of bags of sugar, X in kilograms (kg), from a manufacturer, are normally…

Q: Suppose driving speed (X) on CA 60 measured by the police follows a Normal distribution with mean 65…

A: The objective of the question is to find the probability that the driving speed (X) is greater than…

Q: The variable xx denotes the time taken in seconds for a computer link to be made between the…

A:

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 267 days…

A: Solution-: Given: μ=267,σ=15 We find. P(X&gt;312 days)=?

Q: Suppose X is a non-standard normal variable, with a mean of 110, and std deviation of 13 (i.e.…

A: The mean is 110 and the standard deviation is 13.

Q: A production process has a cycle time, time to produce a part, that is normally distributed with a…

A: We have given that.   X~N( μ , ?^2 )   μ =12.6 , ? =2.4   Z-score =( x - μ )/?

Q: Suppose the distribution of maximum monthly January temperatures in Canberra is normal with mean, μ…

A:

Q: For a recent English exam, use the Normal model N(73, 9.2) to find the proportion of scores under…

A: From the provided information. Mean (x) = 73 And standard deviation (s) = 9.2 Let Y be a random…

Q: Scores on an exam are normally distributed with a mean of 65 and a standard deviation of 9. Find the…

A: Given X is normal Distributed with mean µ = 65.0 and standard deviation σ = 9.0 now will using…

Q: 1. The mean is u = and the standard deviation, o = 2. Find the z-score for x = 10. z = (Round to the…

A: Given that  The data is normally distributed. Mean (μ) = 11 Standard deviation (σ) = 1.5   We know…

Q: The equation for a general normal curve with mean ? and standard deviation ? is images Calculate…

A:

Q: If X is normally distributed and P(X26)=0.0228, find the mean and standard deviation of X. (Make it…

A:

Q: Let X follow a normal distribution with mean 4.7 and unknown standard deviation. If P(X < 9.6) =…

A: Given that

Q: Noise Levels in Hospitals In a hospital study, it was found that the standard deviation of the sound…

A: From the given information we conduct F test for equality of two standard deviation.

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…

Q: Suppose X is a non-standard normal variable, with a mean of 139, and std deviation of 15 (i.e.…

A: The mean and the standard deviations are 139 and 15, respectively.

Q: ) Find the z-score for an IQ of 119, rounded to three decimal places. ) Find the probability that…

A: Note : According to our guidelines we are solving only first three sub-parts of a question and the…

Q: A distribution of values is normal with a mean of 120 and a standard deviation of 6. Find the…

A:

Q: A normal distribution has a mean of 117 and a standard deviation of 4. Find the z-score for a data…

A:

Q: Suppose that the recovery time from the infection with a certain virus is normally distributed with…

A: Note: Hi! Thank you for the question, As per the honor code, we are allowed to answer three…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.