Scores on a Literature test have an average of 80 with a standard deviation of 6. What is the Z-score of a student who got 74 on the test?

Q: A set of 10 scores has a standard deviation of 8. What is the sum of squares?

A: Given,Number of scores = 10Standard deviation = 8Using formulas,For population, For sample,

Q: an exam score has a mean of 506 and a standard deviation of 100. What exam score corresponds to a…

A: μ  = 506 , σ = 100  Z~ N(0,1)

Q: A distribution of values is normal with a mean of 123.2 and a standard deviation of 62 Find P35,…

A: Given: A distribution of values is normal with  μ=123.2 , σ=62

Q: On a recent quiz, the class mean of 74 with the standard deviation of 3.9.  calculate the z-score…

A: Given data  μ = 74σ = 3.9x1 = 95x2 = 70

Q: What is the corresponding Z- score, mean is 110, standard deviation is 8 and x is 90

A: In question, We'll find the Z - score for mean 110, standard deviation 8 and x = 90. The solution is…

Q: The distribution for the time a patient of a medical center spends waiting for an appointment is…

A: Solution: Let X be the time a patient of a medical center spends waiting for an appointment. From…

Q: Scores on a test have a mean of 86 and a standard deviation of 13. Jerrica has a score of 94.…

A:

Q: The scores on a standardized test are normally distributed with a mean of 95 and standard deviation…

A: Given that, The scores on a standardized test are normally distributed with, Mean = 95 Standard…

Q: A teacher says that the top 9​% of the class received an A on the last test. The scores were…

A: Given that the mean is 67 and the standard deviation is 18. That is, μ=67, σ=18 A teacher says that…

Q: Scores on a Literature test have an average of 80 with a standard deviation of 6. What is the…

A: The mean is given to be μ=80 and standard deviation of σ=6. The value of x=74 The formula for…

Q: A psychologist finds that the intelligence quotients of a group of patients are normally…

A: According to the provided information,

Q: IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What…

A:

Q: Scores on a test are normally distributed with a mean of 123 and a standard deviation of 20. What…

A:

Q: The mean grade on a statistics exam is/M=82, the standard deviation is=12. What actual grade has a…

A: The normal distribution  in the center are generally denser and basically less denser at tails.…

Q: What is the corresponding Z score ? Mean is 70, standard deviation is 10 and X= 89

A: We have to find z score.

Q: In a standardized exam the mean score is 400 with a standard deviation of 50. Assume the scores…

A: Solution

Q: Scores on a history test have a get age of 55 with standard deviation of 10. What is the z-score for…

A: GivenMean(μ)=55standard deviation(σ)=10student earned score on test(x)=95

Q: IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What…

A: Obtain the z-score for the random variable X equals 85. The z-score for the random variable X equals…

Q: A standardized test of intelligence is scaled so that the mean IQ is 100, and the standard deviation…

A: Given that information  Mean = mu= 100  Standard deviation = s =15  Zscore = (x - mu)/s

Q: on first math exam , the class average was 90 with a standard deviation of 10. you scored an 100.…

A: The class average was 90 with a standard deviation of 10. That is, μ=90,σ=10. He scored an 100. That…

Q: The mean score in a test is normally distributed with mean 30 and standard deviation 10. What is…

A: Given :  Mean, μ = 30 standard deviation, σ = 10 x = 55

Q: an exam score has a mean of 506 and a standard deviation of 100. What exam score corresponds to a…

A:

Q: Aliyah scored at the 45th percentile on the Stanford Achievement Test (mean= 500, standard deviation…

A:

Q: standardized test has a pop. mean of 152 and a standard deviation of 16. Jenny has a z score of…

A: Given that n=500, z=-0.56

Q: The scores on a standardized test are normally distributed with a mean of 85 and standard deviation…

A: Since z-score is a measure of how far the standard deviation is away from the mean (Above/below).…

Q: The Psych 230 students finished the course with a total population mean of 130 points and the…

A:

Q: A student will spend 15 hours average each week in class. If the standard deviation is 2 hours, what…

A: Given that mean=15 and standard deviation = 2 Let, X= number of hours spent by a student in the…

Q: he scores of adults on an IQ test are approximately Normal with mean 100 and standard deviation 15.…

A:

Q: the average height on the soccer team is 66 inches with a standard deviation of 3. a z score of -1.6…

A: Introduction: Consider X as a normally distributed random variable, with mean μ and standard…

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: Test scores for the SAT are close to normal with an average of 850 and a standard deviation of 100.…

A: Given information: Mean SAT test scores μ=850 Standard deviation of SAT test scores σ=100 The SAT…

Q: At a college, the mean height of women is 63 inches with the standard deviation of 3 inches. What is…

A: Given,mean(μ)=63standard deviation(σ)=3

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.