Distribution of College Algebra Course Grades What is the mean of this normal distribution? What is the standard deviation of this normal distribution?

Q: Try Again Your answer is incorrect. Photon is a training device that is designed to improve a user's…

A: We have given that  Sample size n=120 , favorable cases x=13 Population proportion p=16%=0.16 Sample…

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Q: Which proportion of a normal distribution is located between the mean and z = +1.40? 0.9192 0.0808…

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Q: Determine the area under the (a) Z = -0.72, (b) Z = - 1.69, (c) Z= 0.45, and (d) Z = 0.25. Tables of…

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Q: Question Help v Find the indicated z score. The graph depicts the standard normal distribution with…

A: We have given that  X~N(mu,sigma) mu=0 ,sigma=1 and X=0.9783

Q: Sample standard deviations target the value of the population standard deviation.  true or false?

A: The statement is "Sample standard deviations target the value of the population standard deviation."

Q: True or False: the normal quantile plot shown provides evidence that the data are NOT from a normal…

A: Concept: Q-Q plot are used to identify where the data given is normal or not

Q: Scores on exam-1 for statistics course are normally distributed with mean 65 and standard deviation…

A: Let X denote the Scores on exam-1 for statistics course are normally distributed with mean 65 and…

Q: Assume that adults have IQ scores that are normally distributed with a mean of μ = 105 and a…

A: Given,mean(μ)=105standard deviation(σ)=20

Q: -3.50 and lower -3.3 -32 -31 -3.0 -2.9 -2.8 -2.7 -26 Standard Normal Table (Page 1) NEGATIVE Z…

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Q: Standard deviation tells us How spread out the data are How data varies around the mean or average…

A:

Q: The test scores for the analytical writing section of a particular standardized test can be…

A: The distribution of test scores can be approximated by normal distribution.  Now, from the figure we…

Q: A study found that the mean amount of time cars spent in drive-throughs of a certain fast-food…

A: given data, normal dsitributionμ=142.2σ=24we have to find out the given probabilities.

Q: Tables of areas under the normal curve Find the Z-score such that the area under the standard normal…

A: Let Z be the standard normally distributed random variable with mean 0 and standard deviation 1.

Q: 2. Let x be a normal distribution with mean u and standard deviation a.What is the z score that…

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Q: Find the indicated area under the curve of the standard normal distribution; th- percentage and fill…

A: Empirical Rule: The percentage of values lies between one standard deviation from the mean is…

Q: A histogram of total US monthly retail sales,

A: Histogram: A histogram is the most commonly used graph to show the frequency distribution. the…

Q: the average IQ of an adult is 100 A research phychologist devised a course to improve IQ's  a group…

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Q: Annual Incomes Annual incomes are known to have a distribution that is skewed to the right instead…

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Q: Calculate the 95th percentile of the standard normal distribution. (Round to the hundredths).

A: A standard normal distribution has mean, and standard deviation, .

Q: High school students across the nation compete in a financial capability challenge each year by…

A: It is given that, the random variable X defines the sores of the students.

Continuous Probability Distributions

Probability distributions are of two types, which are continuous probability distributions and discrete probability distributions. A continuous probability distribution contains an infinite number of values. For example, if time is infinite: you could count from 0 to a trillion seconds, billion seconds, so on indefinitely. A discrete probability distribution consists of only a countable set of possible values.

Normal Distribution

Suppose we had to design a bathroom weighing scale, how would we decide what should be the range of the weighing machine? Would we take the highest recorded human weight in history and use that as the upper limit for our weighing scale? This may not be a great idea as the sensitivity of the scale would get reduced if the range is too large. At the same time, if we keep the upper limit too low, it may not be usable for a large percentage of the population!