55. (A) If 120 scores are chosen from a normal distribution with mean 75 and standard deviation 8, how many scores x would be expected to satisfy 67 s x s 83? (B) Use a graphing calculator to generate 120 scores from the normal distribution with mean 75 and standard de- viation 8. Determine the number of scores x such that 67 s xs 83, and compare your results with the answer to part (A).

Q: what will be the value of X at the z score =-3 given, mean=10 and standard deviation =2?

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: Mean of 100 observations is found to be 40. If at the time of computation two items are wrongly…

A:

Q: You have a sample of test scores, the sample mean of the test scores is 70.5, and the standard…

A: Determine the z-score for an individual score of 85. The z-score for an individual score of 85 is…

Q: Suppose that the mean score of a class of 29 students was 78. The 16 male students in the class had…

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Q: The mean salary paid to 1000 employees of a factory was found to be Rs. 2804. Later on it was…

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Q: The scores for female students had a mean of 167 with standard deviation of 27.   you can infer…

A:

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: Ise the normal distribution to the right to answer the questions. Standardized Test Composite Scores…

A: b) The mean is 19.6 and the standard deviation is 5.6.

Q: Suppose X~ N(4,2). What value of x is 1.5 standard deviations to the left of the mean?

A: X~N(μ=4, σ=2)We have to find value of X is 1.5 standard deviation to the left of the mean

Q: Approximately 20% of IU students suffer from triskaidekaphobia. IU Health offers a free screening…

A: We have to find out answer

Q: The Scholastic Aptitude Test (SAT) is designed so test scores are normally distributed. The mean SAT…

A:

Q: Whenever we convert scores from their original units of measurement (e.g., minutes, MPH, ounces)…

A: The z score is defined as Z = (X - mean)/SD

Q: Around 750 students took an IQ test. The IQ scores follow a normal distribution and has a mean of 85…

A: Note: " Since you have posted many sub-parts. we will solve the first three sub-parts for you. To…

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 17 for the population…

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Q: All of the accountants at a small paper company are required to take the same accounting exam to…

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Q: Suppose IQ scores of students at Bradley follow a normal distribution with a mean of 103 and a…

A: Calculate the IQ score for the top 2.5% of all IQ's at this college.

Q: A population of scores forms a normal distribution with a mean of 180 and a standard deviation of…

A:

Q: An original population of scores with a mean = 50 and SD = 6 is standardized to create a new…

A: given data  1 represents original population 2 reperesents new distributionμ1 = 50μ2 = 80σ1 = 6σ2 =…

Q: In an exam for a statistics class, the class average is 68 with a standard deviation 4. If a student…

A: Given mean μ= 68, standard deviation σ= 4 Let X: score of the students = 75

Q: If 3 standard deviations to the left of the mean gives you a value of 30 on the normal curve and 4…

A: 3 standard deviations to the left of the mean=30i.e and 4 standard deviations to the right of the…

Q: The scores on a standardized test are normally distributed with a mean of 90 and standard deviation…

A: The test score is 0.6 standard deviations above the mean is obtained below: From the given…

Q: Suppose that the scores on a statewide standardized test are normally distributed with a mean of 71…

A:

Q: In 1988, on the math SAT, the males taking the exam averaged about 500, while the females averaged…

A: From the provided information,

Q: Suppose that blood chlorine concentration (mmol/L) has a normal distribution with mean=98 and…

A:

Q: For a population with  = 150, a raw score of X = 125 corresponds to z = -2.00.  What is the standard…

A: Consider that the mean and standard deviation of a random variable x are µ and σ, respectively.…

Q: (a) between 56 and 74. % (b) above 68. % (c) below 56. %

A: here as per guideline i have calculated 3 subparts , plz repost for remainning. Suppose that the…

Q: Carry intermediate calculations to three or more decimal places. (If necessary, you can refer to a…

A: Sample size n =18Standard deviation s=12NOTE:- According to bartleby guidelines expert can solve…

Q: Assume that an intelligence test scores are distributed normallt with a mean of 100 and a standard…

A: Standard normal distribution: The standard normal distribution is a special case of normal…

Q: In the same class, Idris scored 82% on a test with a z-score of 1.5 while Malik got 54% with a…

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Q: The mean of the population is 50. The standard deviation is 10. (a) What is the probablity that a…

A:

Q: For a population with  = 15, a raw score of X = 82 corresponds to z = -0.60.  What is the mean for…

A: Consider that the mean and standard deviation of a random variable x are µ and σ, respectively.…

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

A: The normal distribution:A continuous random variable X is said to follow normal distribution if the…

Q: Suppose that IQ scores in 1 region are normally distributed worth a standard deviation of 16.…

A: We have to find population mean.

Q: average score that can be obtained on a standardized test at your school is 114with a standard…

A: Sample size n =18Standard deviation s=12NOTE:- According to bartleby guidelines expert can solve…

Q: There are two samples of children taken from a population. In the first sample, mean of age of 20…

A: Combined mean : To integrate two or more things into a single entity is to link them together.When…

Q: In 1940 the average size of a U.S. farm was 174 acres. Let's say that the standard deviation was 51…

A: Given that, mean =  = 174 standard deviation =  = 51 n = 45  =   = 174  =  /  n = 51 / 45 = 7.60

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.