12. It is the square of the population standard deviation. Answer:
Q: Find the z-score for the value 62, when the mean is 56 and the standard deviation is 2. O A. z=3.00…
A: the PDF of normal distribution is = 1/σ * √2π * e ^ -(x-u)^2/ 2σ^2standard normal distribution is a…
Q: Naomi scores 39 on a test. The standard deviation is 6.00. Her z score is +1.5. What is the mean of…
A: given data x = 39 σ = 6z = 1.5μ = ?
Q: 20 26 40 39 25 36 34 Solve for the mean deviation and standard deviation
A: Given : 20 26 40 39 25 36 34 Here n=7 i.e Sample size (n)=7
Q: n a set of score, the coefficient of variation (in percentage terms) = 50% and standard deviation =…
A: The coefficient of variation is the ratio of the standard deviation to the mean. It is a measure of…
Q: The mean of a normal disiribution is 50 and standard deviation is 12.5. Calculate the 60th, 65th and…
A: Given,mean(μ)=50standard deviation(σ)=12.5
Q: Assume that weights of men are normally distributed with a mean of 160 pounds and a standard…
A: Given, Weights of men follows normal distribution with mean 160 pounds and standard deviation 25…
Q: Let's look at the relationship between hour Price (in thousands of dollars) and house Size (in…
A: Given Information: Price=-3.117+94.454 size Correlation coefficient r=0.77
Q: Need asap For a medical study, a researcher wishes to select people in the middle 75% of the…
A:
Q: For a group containing 100 observations, the arithmetic mean and the standard deviation 9 a nd-/1O5…
A: In the given situation, there are 100 observations. The arithmetic mean is 8 and the standard…
Q: IQ scores are normally distributed with a mean of 100 and standard deviation 16. Calculate the…
A: The question is about normal dist. Given : Popl. mean of scores ( μ ) = 100 Popl. std. deviation of…
Q: Use the difference scores (values - mean) below to calculate the population standard deviation.…
A: Given : Total number of elements in the population =N=9 Data is given as (values-mean)…
Q: Can you find the standard deviation for sx and sy?
A:
Q: scores are normally distributed with mean 500 and standard deviation 100. Julie scores 650. Her…
A: Consider X be the random variable representing the SAT scores. X follows normal distribution with…
Q: What information can you get from a person’s z-score? a. Whether they are above or below the mean b.…
A: Solution
Q: Heights for group of people normally distributed with mean = 65 inches and standard deviation = 2.8…
A: Let us denote H as the heights follows normal distribution with mean 65 and standard deviation of…
Q: If the average number of textbooks in professors' offices is 14, the standard deviation is 5, and…
A: Given that For textbooks, mean = 14, and SD = 5 For age, mean = 42, and SD = 10
Q: how did you find the standard deviation to be 1.2. explain clearly?
A: Here we have to explain the how we get standard deviation is 1.2
Q: Suppose a variable is normally distributed. What percentage of scores fall between one standard…
A:
Q: A normal population has mean u=56 and Standard deviation o=8. What is the 85th the population?…
A: We have given that Mean, μ = 56 Standard deviation, σ = 8
Q: Find the percent of area under a normal curve between the mean and -1.18 standard deviations from…
A: Here Given For normal curve
Q: the average grade is 84 with a standard deviation of 4. What is each grade for -1 2 0 1.5 -1.25
A: Given Mean μ=84Standard deviation σ=4 The formula for Z score isZ=X-μσX=Z×σ+μ
Q: Consider a value to be significantly low if its z score less than or equal to −2 or consider a value…
A: The mean test score to assess readiness for college = 20.8 Standard deviation = 4.5 Given z…
Q: In an Algebra class, the scores on a test are normally distributed. The middle 68% of the scores…
A: By empirical rule, 68% of data falls within one standard deviation. Thus, based on given info,…
Q: The weights of 6 month-old girls in the United States are Normally distributed with a mean of…
A: From the provided information, Mean (µ) = 16 pounds Standard deviation (σ) = 2 pounds Let X be a…
Q: Write the steps of calculating the population standard deviation.
A: Standard deviation: The standard deviation is based on how much each observation deviates from a…
Q: Can be interpreted tandard deviation Bayes factor as the size of the differ units.
A: The statement is the size of the difference between means in standard deviation unit Effect size is…
Q: 18. Calculate the ±3 standard deviation range for the mean of 15.7 and S
A: Mean=15.7 Standard deviation=4.2
Q: Alice has been in a walking/jogging exercise program for 10 days, and each day she has recorded th…
A: The data set for distance covered for 10 days is1.8,2.1,1.7,1.9,2.3,2.3,2.5,2.4,2.6,2.7sample…
Q: Calculus I scores at College A have mean 70.21 and standard deviation 15.32; Calculus I scores at…
A: Calculus I scores at College A have mean 70.21 and standard deviation 15.32;Calculus I scores at…
Q: that the distribution is normal. What is the chance that three indoor cats die between 15 and 18…
A: here mean= 14 year standard deviation = 2.5 year
Q: Let's look at the relationship between hour Price (in thousands of dollars) and house Size (In…
A: Note: Hi! Thank you for the question. As you have posted multiple sub-parts, according to our…
Q: Which average is affected most by extreme values Oa. Median O b. Arithmetic Mean OC. Mode Od.…
A: Median is the middle-most value of the sorted data. Removing extreme values does not affect much the…
Q: The mean deviation of the following data: 82, 79,61,94,73, 64, 51 11.72 The 11.42 The 11.46 The
A:
Q: Exam scores have a normal distribution, with Mean of 70 and Standard deviation of 10. Bob’s score…
A: Exam scores have a normal distribution, with Mean of 70 and Standard deviation of 10. Bob’s score…
Q: On average, Americans have lived in 2 places by the time they are 18 years old. Is this average less…
A: Given Mean=2 x-bar=1.99 Standard deviations=0.3 n=62
Q: None
A: First, we need to find the probability between 73 and 86 and then use this to find the number of…
Step by step
Solved in 2 steps with 1 images
- uppose you know that the amount of time it takes your friend Susan to get from her residence to class averages 50 minutes, with a standard deviation of 5 minutes. What proportion of Susan's trips to class would take more than 50 minutes? proportion more than 50 minutes:Find the percentage of area under a normal curve between the mean and the given number of standard deviations from the mean. This problem can be solved using technology or the table for the standard normal curve from your text. −0.4 The percentage of area under the normal curve between the mean and −0.4 standard deviations from the mean isCholesterol levels of 200 or higher are considered high for teenagers. What percent of teen boys have high cholesterol? Explain.
- Thanks!What is the relationship between the variance and the standard deviation for a sample data set? A. The standard deviation is equal to half the variance. B. The standard deviation is equal to two times the variance. C. The standard deviation is the square root of the variance. D. The standard deviation is the square of the variance.SAT tests have a mean of 500 and a standard deviation of 100. They are normally distributed. Amy got a 640. What percentile is she in?
- Square of the standard deviation is called Select one: O a. Coefficient of determination b. Variance c. Square Deviation d. Mean DeviationThe lifespans of lizards in particular zoo are normally distributed. The average lizard lives 3.1 yearsthe standard deviation is 0.6 years. Find the probability that the lizards live longer than 3.1 years or less than 2.5 yearsHint: Draw and label a normal curve and use the percentages of the standard deviations. Write your answer using only numbers and do not include units. For example 95.3% would be entered as 95.3What is the mean?What is the standard deviation?What percentage of values should fall between 37 and 41?Which value has a z-score of -2?
- Find the area of the shaded region. The graph depicts IQ scores of adults, and those scores are normally distributed with a mean 100 and a 11. standard deviation 15. The area of the shaded region is 105Interpret the Z score for a student who scored an 91 on an exam that had a mean of 86 and a standard deviation of 5. One mean above the standard deviation One standard deviation above the mean One standard deviation below the mean One mean below the standard deviationIQ scores are normally distributed with a mean of 100 and standard deviation 16. Calculate the z-score for an IQ of 76. Include one decimal place in your answer. Add your answer