A quantitative data set has mean 19 and standard deviation 4. Approximately what percentage of the observations lie between 11 and 27​

Q: Molly's score was 68 on a test with a mean of 80 and a standard deviation of 9.  What is her…

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Q: The average expenditure on Valentine's Day was expected to be $100.89  (USA Today, February 13,…

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Q: The descriptive measure of dispersion that is based on the concept of a deviation about the mean is…

A: Range : Range is the measure of dispersion. It is the difference between minimum value and maximum…

Q: College freshmen took a psychology exam. If the mean is 80, the standard deviation is 10, and the…

A: Given mean = 80  And , Standard Deviation = 10

Q: The data describing the hourly output of a production line are normally distributed, with a mean of…

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Q: What is the point estimate of the difference between the population mean expenditure for males and…

A: Provided data is, the average expenditure on Valentine's Day was expected to be $100.89. The average…

Q: Diastolic blood pressures are assumed to follow a normal distribution with a mean of 90 and a…

A:

Q: The mean score on an English test was 74 with a standard deviation of 3. The mean score on a history…

A: topic - coefficient of variation

Q: The mean IQ is 100 points with a standard deviation of 15 points. 4) What percent of the population…

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Q: If a set of data has a mean of 50 and a standard deviation of 4.5, what is the z-score for a value…

A: If a set of data has a mean of 50 and the standard deviation of 4.5. We have to find the z-score for…

Q: study of 25 healthy individuals ranges from the mean value of a biomarker to 750 ± 10ng / L. The…

A: From the given information, Sample size (n)  =25 The mean value of biomarker = 750 ± 10ng / L…

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: Given the figure above is a normal curve, with a mean score of 100 and a standard deviation of 15, a…

A: Given that ; Mean (μ) = 100 ? = 15  The given curve follows standard normal distribution by using…

Q: The average IQ in Sarah’s class is 105 with a standard deviation of 15. What is the z score of Sarah…

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Q: Suppose that the distribution of a set of scores has a mean of 47 and a standard deviation of 14. If…

A: Here, mean is 47 and a standard deviation is 14.

Q: What is the mode of the data?  d. What is the standard deviation of the data?

A: Given Frequency table, Class Interval Frequency Relative Frequency 1 to 5 3 3 6 to 10 4 7…

Q: how woud you go about finding the standard deviation for the given data.  196 205 215 185 229 278…

A: For the given data, standard deviation can be obtained as follows.Mean: Arithmetic mean is the…

Q: The distribution of the weights of patients at a local urgent care clinic is Normal, with a mean of…

A: a) The probability that  is equal to the blue area under the curve. Since μ = 150, σ = 10.6…

Q: *. The mean IQ is 100 points with a standard deviation of 15 points. a) What percent of the…

A: From the provided information, Mean (µ) = 100 Standard deviation (σ) = 15 X~N (100, 15) Here X is…

Q: Suppose the mean percentage in Algebra 2B is 70% and the standard deviation is 8%. What percentage…

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Q: The mean grade on a final examination was 72 and the standard deviation was 9. The top 10% of the…

A: Mean(µ) = 72Standard deviations (σ) = 9

Q: On an exam with a mean of µ = 70, a person scores X = 60. Which of the following values for the…

A: Given ,         Mean μ=70and a person score X=60If σ=2 , μ=70 , x=60 then the z-scoreis z-score…

Q: and symmetric with a mean of 160 pounds and a standard deviation of 30 pounds. What percent of the…

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Q: The mean for the entire population of depressed people is 33.13 with a standard deviation of 5. If…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: In one town, the number of pounds of leafy greens consumed per person per year has a mean of 10…

A: (1) Standardized z-score:   The standardized z-score represents the number of standard deviations…

Q: Please answer B and C:

A: Solution: b. Let X1 be the expenditure of the male customers and X2 be the expenditure of the female…

Q: USA Today reports that the average expenditure on Valentine's Day was expected to be $100.89. Do…

A: Given: n1=46x¯1=130.6σ1=33n2=31x¯2=66.39σ2=20 CI = 99%=0.99

Q: The mean GPA for 50 students was 3.02 and the standard deviation was 0.3. Part A : Assume that the…

A: Given : for 50 students  Mean GPA (μ) =3.02 Standard deviation (S.D)(σ) = 0.3

Q: USA Today reports that the average expenditure on Valentine's Day was expected to be 100.89. Do male…

A: From the provided information,

Q: The number of assists per match for the setters on your school’s volleyball team has a mean of 51…

A: The mean is 51 and the standard deviation is 10.

Q: A quantitative data set has mean 25 and standard deviation 2. At least what percentage of the…

A: The Chebyshev’s rule states that, for any quantitative data set and any real number greater than…

Q: In a Science test, the mean is 46 and the standard deviation is 4. Assuming the scores are normally…

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Q: The heights of adult men on an island in the Pacific are approximately normal with an average height…

A: Let x be the heights of adult men on an island in the Pacific which is approximately normal with…

Q: Explain why we need to square the deviations from the mean in our calculation of the standard…

A: 3) The deviation formula is, Deviation=Xi-Mean In the formula Xi is individual scores.

Q: A distribution is given as X~U (2,10). What is the 75th percentile? What is the 40th percentile?…

A: It is given that the X follows Uniform distribution with a as 2 and b as 10. X ~ U (2, 10).

Q: percentile rank on each exam? Percentile rank of ACT  Percentile rank of SAT  On which exam did…

A: The mean and standard deviation for the ACT are 18 and 7. Carla scored 31 on her ACT. The value of…

Q: The scores on a psychology exam were normally distributed with a mean of 67 and a standard deviation…

A: The scores on a psychology exam were normally distributed with a mean of 67 and a standard deviation…

Q: A medical staff who knows statistics is concerned with the weights of babies. What's the minimum…

A: Given that: Standard deviation = = 7 margin of error = E = 2.1 At 97% confidence level the z is ,…

Q: Q scores are approximately normally distributed with a mean of 100 and standard deviation of 15, the…

A: Given: μ=100, σ=15 The corresponding z-value needed to be computed is: The probability that people…

Q: What is the observed value for the 98th percentile of a population with a mean of 2.5 and a standard…

A:

Q: The mean SAT score for 13 male highschool students is 500 and the standard deviation is 100. the…

A: Let us denote the group of males as 1st sample and group of females as 2nd sample. Hypotheses for…

Q: Suppose the weight of dogs is normally distributed with a mean of 35 pounds and a standard deviation…

A: We have to find z score for given data..

Q: Women’s heights have a mean of 63.6 inches and a standard deviation of 2.5 inches. Men’s heights…

A: It is given that the women’s heights have a mean of 63.6 inches and a standard deviation of 2.5…

Q: The mean composite score for seniors who took the SAT in 2018 was 1068. If the standard deviation…

A: It is given that Mean = 1068, SD = 100 Standardized score z = -0.75

Q: the standard deviation of a sample of 50 observations equals 10. the variance of the sample equals?…

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Q: A survey collected the data below. x 26 4 16 12 20 The mean is 15.6. Calculate the deviation of…

A: Given data,  X : 26, 4, 16, 12, 20 Given mean is 15.6 To find the deviation of x = 16

Q: According to Chebyshev's theorem, which of the following is the percentage of measurements in a data…

A: please see the next step for solution

Q: The annual salaries of employees in a large company are normally distributed with a mean of $55,000…

A: Given  For x = 55000 for x = 70000

Q: what is the z score for a person who received an SAT mathematics score of 685?

A: Here Given, The mean mathematics score for seniors who took the SAT in 2018 was 531. If the standard…

Q: The mean for a data set is 61. The standard deviation is 4 and the z score is 0.45 find the raw…

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