A sample has a mean M = 55. For the sample, the standard deviation is ? = 12 and the score corresponds to z = 1.25. What is the score?

Q: The quality-control manager at a light bulb factory needs to determine whether the mean life of a…

A: Given,sample size(n)=64sample mean(x¯)=350Population standard deviation(σ)=100

Q: You throw a ball as far as you can 5 times, recording the distance for each throw: 165 feet, 184…

A: since only 5 observation is given we will consider them as sample (n = 5)and population (N = 100)…

Q: A population has mean 49 and standard deviation 5. What is the data value that has a z-score of 2?…

A:

Q: IQ scores have a mean of 100 and a standard deviation of 15. What percentile corresponds to an IQ…

A: Given that Mean =100  Standard deviation =15  We have to the percentile  corresponding to an IQ…

Q: A class of 30 62.171 students took a quiz worth 50 points. The standard deviation of the scores was…

A: Standard deviation of sample is given by

Q: A recent poll found that 59% of adults believe the state of moral values is poor. For 400 randomly…

A: Here, n = 400 and p = 0.59

Q: A researcher measures the amount of food consumed by each dog in her lab. She finds that the mean…

A: It is given that mean amount of food is 12 oz and number of dogs is 16. The sum of squared…

Q: The mean of a set of data is 108.06 and its standard deviation is 115.45 What is the z score for a…

A: Z-score = 3.3045 answer.

Q: Use z scores to compare the given values. The tallest living man at one time had a height of 254 cm.…

A:

Q: Molly earned a score of 920 on a national achievement test. The mean test score was 825 with a…

A: Given that, The proportion of students had a higher score than Molly is,

Q: You have a dataset with a mean of 50 and a standard deviation of 5. What is the coefficient of…

A: From the provided information, Mean (x̄) = 50 Standard deviation (s) = 5

Q: Suppose a variable is normally distributed. What percentage of scores fall between one standard…

A:

Q: Laura learned that the average GPA in her school is 3.6 with a standard deviation of 0.3. If her GPA…

A: From the given information,   Mean = 3.6 Standard deviation = 0.3   The objective is to find the…

Q: John got 83 on a test, with a standard deviation of 10.73 and the class mean was 77.1. Paul got 88…

A: From the provided information, John got (X) 83 on a test with a standard deviation (σ) of 10.73 and…

Q: A test score of 45 has an equivalent standard score (z-score) of 1.6. If the mean test score is 39,…

A: given dataraw score  x = 45standard score   z = 1.6mean μ = 39S.D.  σ = ?

Q: The average and standard deviation for ACT scores are 20 and 3 respectively. average and standard…

A:

Q: Find the standard deviation if the mean = 2, mode = 5, variance = 56 . Round your answer to three…

A: We have given that,  Mean (x̄) = 2 , mode (z) = 5 and variance        (s^2) = 56 Then,  We will find…

Q: What raw score does he need to get the certificate

A: Given that Mean = 83 And SD = 3.2

Q: Use z scores to compare the given values. The tallest living man at one time had a height of 234…

A:

Q: Justin got a score of 85 on an GE MMW examination for which the mean is 75. Justin realized that the…

A: Given:Here use the formula;here,  represents the value of Standard Daviation.

Q: Omar is trying out to be a firefighter.  On the written exam, the mean of everyone who takes the…

A:

Q: Researchers measured the data speeds for a particular smartphone carrier at 50 airports. The highest…

A: GivenHighest speed measured (x)=78.4Mean(x)=18.37standard deviation(s)36.54

Q: he mean on an exam is 80 with a standard deviation of 5 points. If Joe scored a 90 on the exam, what…

A: given data, μ=80σ=5x=90 z score for the given data=?

Q: On a nationwide math test, the mean was 72 and the standard deviation was 7. If Roberto scored 90,…

A: Given that, Mean = 72 Standard deviation = 7

Q: he scores on a psychology exam were normally distributed with a mean of 65 and a standard deviation…

A: Given,μ=65σ=6

Q: Use z scores to compare the given values. The tallest living man at one time had a height of 245 cm.…

A: Determine the Z-score for the tallest man. The Z-score for the tallest man is obtained below as…

Q: H=34, o=4.5, the score is 2.5 standard deviations above the mean

A: Suppose the variable of interest is x.The mean is and the standard deviation is .

Q: If you score 76 on a commercial pilot exam that has a mean score of 70 and a standard deviation of…

A: We have to find given percentile ....

Q: SAT scores have a mean of 1026 and a standard deviation of 209. ACT scores have a mean of 20.8 and a…

A:

Q: A standardized​ exam's scores are normally distributed. In a recent​ year, the mean test score was…

A: GivenMean(μ)=1457standard deviation(σ)=315

Q: The average chef at a restaurant earns $17 an hour with a deviation of $1.75. What are the chances…

A:

Q: Many students did an exam, the mean was 15 and the standard deviation was 32 The highest mark was…

A: Given Mean μ=15, standard deviation σ=32  X=103

Q: standard deviation

A: If the random variable X follows a distribution with mean = μ and standard deviation = σ Then the Z…

Q: Explain what would happen if Person A scored lower than the mean of 70. Give an example exam score…

A: To compare the performance of Person A and Person B on their respective exams with their classmates,…

Q: is 6% is your standard deviation?

A: Given according to question Sample size(N)=? Confidence =95% Margin of error = 5% Now question says…

Q: Test scores for a history class had a mean of 69 with a standard deviation of 4.5. Test scores for a…

A: The objective of this question is to determine on which test the student performed better by…

Q: Pearson publishes textbooks each semester and the mean number of textbook pages published by Pearson…

A: Given data,μ=568σ=150P(X>733)=?