3. In a set of scores that are normally deviationsbelow the mean is 11.4 and the score three standard deviations above the mean is 73.2. Solve for the mean and standard deviation of the set of scores. d 74 hours sleeping at night, witha standard

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A: Let X be the random variable which follows normal distribution with mean 7 and standard deviation 2.…

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A: “Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: Using the standard normal distribution find the following. а. Р(z $2.39) e. P(-2.35< z<1.87) b.…

A: Hey, since there are multiple subparts posted, we will answer first three question. If you want any…

Q: The SAT Verbal Test in recent years followed approximately a normal distribution with a mean of 460…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: Using a calculator, solve for the mean and the standard deviation of the given set of data. d. 54,…

A: d) Step-by-step procedure to find the mean and standard deviation using TI-84 calculator:  Enter…

Q: Find the percentage of area under a normal curve between the mean and the given number of standard…

A: We will use Excel to find the required area under the standard normal curve.

Q: Solve using R calculator. Show all work.

A: The probability shows how likely an event occurs.

Q: The average score of one of your Math exams was 75 with a standard deviation of 20. Assuming the…

A: From the provided information, Mean (µ) = 75 Standard deviation (σ) = 20 X~N (75, 20)

Q: What does the z-score of a data point tell us? O How many standard deviation a number is from the…

A: Here we have to identify the correct statement

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Q: Suppose X - N (-9,4). Between what a values does 95.48% of the data lie? The range of a values is…

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Q: Please help. Part A

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Q: Today, the waves are crashing onto the beach every 4.6 seconds. The times from when a person arrives…

A: The mean of this distribution is  a midpoint between the ends.  Mean = (4.6 + 0)/2 = 2.3 seconds

Q: Provide an appropriate response. Find the z-score for the value 68, when the mean is 69 and the…

A: Given that  Mean=69 Standard deviation=2 To find the Z score for the value 68.

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A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: Consider a value to be significantly low if its z score less than or equal to - 2 or consider a…

A: Given information Mean µ = 19.1 Standard deviation σ = 4.7 Test score are significantly low if Value…

Q: P(x) 0.15 0.35 0.40 10 0.10 x368

A: Solution-: We have given the following table: X P(X) 3 0.15 6 0.35 8 0.4 10 0.1 We…

Q: A distribution has a mean of 30 and a standard deviation of 5. Approximately 68% of the distribution…

A: according to the Empirical rule .

Q: In an Algebra class, the scores on a test are normally distributed. The middle 68% of the scores…

A: Given that,The middle 68% of the scores fall between 77 and 93.

Q: Find the mean of the data set. Graph/chart x= (Round to the nearest tenth as needed.) Complete the…

A: Mean: For a set of n observations, x1, x2, ... , xn with frequencies f1, f2, … , fn, mean is given…

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A: The mean test score  to assess readiness for college = 20.8 Standard deviation = 4.5   Given z…

Q: Give typed explanation Calculate the mean, median, standard deviation, and coefficient of…

A: To find the mean median and standard deviation and coefficient of variation.

Q: 3. A website captures information about each customer's order. The total dollar amounts of the last…

A: Obtain the value of the mean absolute deviation.   Use EXCEL Procedure for finding the value of mean…

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A: 19, 27, 27, 14, 23, 17, 32, 11, 27, 31, 22, 33, 28, 26, 31, 25, 23, 31, 26, 36, 24, 28, 12, 28, 25,…

Q: multiple appropriate equations or symbols. The first table consists of altermative ways of referring…

A: Solution: N Population size n= sample size SS  = Sum of square deviation σ2=SSN Population variance…

Q: 1. A class had a quiz in Statistics. The scores of the students has a mean of 87 and standard…

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Q: The average score of one of your Math exams was 75 with a standard deviation of 20. Assuming the…

A: Given that information  Normally distributed with Average (x bar)= 75 Standard deviation (s) = 20 Z…

Q: standard deviation is s = 30. Determine the test statistic for this test.

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Q: 47 50 53 56 59 Select the correct choice below and, if necessary, fill in the answer boxes to…

A: We have given that a statement about the graph, whether the graph shown could represent a variable…

Q: Which set of scores has the smallest standard deviation?​ Group of answer choices a. ​5, 11, 42, 22…

A: a)Given data set is 5,11,42,22

Q: Find the value of x. 4, 5, 9, ?, 2, 8; mean = 6

A:

Q: Using the short cut formula we learned in class, find the standard deviation of the following list…

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Q: Use the table to answer ITEMS 6 - 12. f 2 3 4 7 2 9 5 10 1

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Q: OC. The graph could not represent a variable with a normal distribution because the curve has two…

A: Solution: A graph is given in the problem.