On a normal distribution, four participants obtained the following deviation scores: -5,0,+3,+1.  what person obtained the lowest raw score? How do you know? Which person's raw score had the lowest frequency? How do you know? Which person's raw score had the highest frequency? How do you know? Which person obtained the highest raw score? How do you know?

Q: B.) Select the best answers regarding the figures below. 1.) In the sample distributions in Figure…

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Q: Blood sugars from eight patients in a rural clinic were recorded last summer by the local physician.…

A: Given blood sugar results are120,145,200,250,79,100,894,255sample size(n)=8

Q: In any symmetrical distribution, what percentile would be associated with the mean value? What…

A: For a symmetric distribution, often the mean, median, and mode all occur at the same point.…

Q: With the aid of a table, find the sample Standard Deviation of the following dataset: X = {2.2, 4.7,…

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Q: Given a uniform distribution with endpoints 4 and 22: What is the mean?        What is the…

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Q: How many observations would fall beyond two sample standard deviations below and above the sample…

A: We know that , If observations of data is 2 standard deviation  below the mean then we will have…

Q: A. In a test of a lifelong brand of tires, a survey revealed that the mean life was 35,000 miles and…

A: Normal Distribution: A continuous random variable X is said to follow Normal distribution with…

Q: Heights of 10-year-old, regardless of sex, closely follow a normal distribution with mean 55 inches…

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Q: A pharmaceutical company claims that a drug is effective in treating 90% of people having severe…

A: It is given that the random variable follows a binomial distribution with n=6 and p=0.9.

Q: The We Go Farther Tire Company advertises a tire that lasts for 80,000 miles. The mileage for the…

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Q: In a distribution exactly normal, 7% of the items are under 35 and 89% are under 63. What are the…

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Q: A marketing researcher for a phone company surveys 176 people and finds that the proportion of…

A: From the provided information, Sample size (n) = 176 Proportion (p) = 0.11

Q: In a normal distribution of scores, four participants obtained the following deviation scores:…

A: Given Information:  Deviation scores = -1, +2, +3 , -0.15

Q: After examining a child at his​ 2-year checkup, the​ boy's pediatrician said that the​ z-score for…

A: The z score is given by Z = 1.31

Q: Using the ungrouped find the following | Quartile deviation, Average deviation, Standard deviation.…

A: Descriptive statistics can be used for explanatory data analysis purposes. It give a basic idea…

Q: Find the population standard deviation for the following scores: x = 2,45,2,6,3,2,9,10,11,34,64

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Q: The number of hours worked per week for a sample of ten students is shown below. Student Hours 1 2…

A: Note- As per our policy we can answer the first 3 sub-parts of a question.   Given information- The…

Q: A marketing researcher for a phone company surveys 184 people and finds that the proportion of…

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Q: In an English test, the mean is 60 and the standard deviation is 6. Assuming the scores are normally…

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Q: 3. Given the sample variance of a distribution, explain how to find the standard deviation.

A: Variance is the measure of dispersion that calculates the average of the squared difference from the…

Q: he scores of students on an exam are normally distributed with a mean of 424 and a standard…

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Q: 2. How is the sample size related to the deviation?

A: We have to define how sample size is related standard deviation

Q: A standardized memory test has a mean of μ=100 and a standard deviation of σ = 10. Answer the…

A: (c )   Obtain the scores that separate the middle 28%. The scores that separate the middle 28% is…

Q: In a normal distribution, about what percent of the data lies within one, two, and three standard…

A: We have to determine the percentage between (mean - SD, mean + SD), (mean - 2SD, mean + 2SD) and…

Q: A positively skewed population has a mean of ? = 100 and a standard deviation of ? = 15. a. What is…

A: Mean of , μ = 100 Standard deviation of , σ = 15   What is the mean of the distribution of sample…

Q: The ages of employees in a certain company were bell-shaped with mean 28 and standard deviation 5.…

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Q: According to a study conducted by NASA, the average breadth of an adult man's hand is 3.5 inches.*…

A: Formula for z score is as below :

Q: The scores of students on an exam are normally distributed with a mean of 335 and a standard…

A: We have to find quartiles.

Q: if the sample mean is 10, the population standard deviation is 20, and the sample size is 25, then…

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Q: For a perfectly symmetrical distribution with a median of 30, what is the value of the mean?

A: It is given that the distribution is perfectly symmetric and the median is 30.

Q: In a normal distribution, 31% of the items are under 45 and 8% are over 64. Find the mean and the…

A: Given Data: Let X represent the variable P(x<45)=0.31 P(x>64)=0.08   X~ Normal μ, σ2   To…

Q: On a normal distribution, at what percentage must a. The mean fall? b. The median fall? c. The…

A: Normal distribution, also known as the Gaussian distribution, is a probability distribution that is…

Q: Given a sample data set with a Coefficient of Variation of 40.2 and a Mean of 5.0, what is the…

A: Given information: For a sample data set, The value of the coefficient of variation is, CV = 40.2%…

Q: Consider the following data: 10,6,1,2,8,9 Calculate the value of the sample standard deviation.…

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Q: In a statistics class, 10 scores were randomly selected, and the following results were obtained:…

A: Mean: It is the sum of the total observations divided by the total number of observations. Range: It…

Q: If the number of degrees of freedom for a chi-square distribution is 32, what is the population mean…

A: We have given that,  Number of degrees of freedom from chi- square distribution (df) = 32  Then, We…

Q: A sample of data is given as below:3, 5, 7. What is the standard deviation

A: The formula for sample standard deviation is,

Q: Based on a normal distribution, which score is better? A score 76 on a test for which the mean was…

A: Given data,For A:Score is x=76Mean μ=80sd     σ=5For B:Score is x=81Mean μ=86sd     σ=6

Q: The sample standard deviation is a measure of what?

A: The sample standard deviation is a measure of spread of scores within a sample data.

Q: In a recent study on world​ happiness, participants were asked to evaluate their current lives on a…

A: X follows a Normal distribution with mean = 5.5 and S.D = 2.3 Then z=(x-mean)/SD = (x-5.5)/2.3…

Q: Which data set would you expect to have the highest standard deviation? Why? Heights (lengths) of…

A: 7. Answer: The b) Heights of all elementary school children have the highest standard deviation.

Q: A guidance counselor wishes to determine the mean number of changes in academic major by college…

A: Given that, Standard deviation = 0.45 90% confidence level

Q: If the mean height of a full-grown Wookie is 83 inches with a standard deviation of 4 inches, what…

A: Mean=83 Standard deviation =4 Z score =? For x=88

Q: Determine the point estimate, p and the sample standard deviation, S5.

A: here n = 439 x= 162 here x= no of students working full time while going to school

Q: The college board reports that in a recent year, the mean mathematics SAT score was 514, and the…

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Q: You are asked to compare the means of two data sets, A and B, with standard deviations that are not…

A: Solution: Let nA be the number of measurements in data set A and nB be the number of measurements in…

Q: In a recent study on world​ happiness, participants were asked to evaluate their current lives on a…

A: Solution To find percentile we will use percentile in excel.

Q: What is the standard deviation for the data given: 12, 18, 16, 22 Select one: а. 17.33 b. 13 c. VT3

A: Solution : Given data is :12,18,16,22 x¯=∑xin=12+18+16+224=17

Q: A standardized memory test has a mean of μ=100 and a standard deviation of σ = 10. Answer the…

A: the PDF of normal distribution is = 1/σ * √2π * e ^ -(x-u)^2/ 2σ^2standard normal distribution is a…

Q: What proportion of a normal distribution corresponds to z scores greater than -0.82?   Question 10…

A: According to the given information, we have Z score = -0.82 (Right tailed)

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.