If the average grade on an exam was 75% and the standard deviation was 4%, what would the three uper limit intervals be for the given normal curve by the empirical rule? O 72, 77, and 90 O 79, 83, and 87 O 83, 87, and 91 O 75, 79, and 83

Q: Assume we know that for a population of N- 10 scores the standard deviation is s = 2. Therefore, the…

A: The formula to obtain the sum of squared deviations for the population is,

Q: a. A student performance in certain exam was 10/100, later he got a 98/100, discuss which is better…

A: Range is better than mean to reflect his performance because the mean of the two scores will not…

Q: Solve the average deviation for a grouped frequency distribution of the following data: (Class…

A: From given data: Class (x) Frequency (f) 10-14 3 15-19 4 20-24 5 25-29 4 The average…

Q: c) The Coefficient of Variation (C.V) for the following data (11, :51, 12, 25, 10, 25, 13) is

A: Co-efficient of variation = σμ*100

Q: In comparing variance and standard deviation which of the following statements is true? O a. Both…

A: A. Both variance and standard deviation amplify data values

Q: The 222 students enrolled in online‐l earning courses offered by a college ranged from 18 to 64…

A: Mean, µ = 28 and standard deviation, σ = 4.

Q: Find the standard deviation and coefficient of variation from the following data: Marks No. of…

A:

Q: Based on the graph of this normal distribution, a. The mean is b. The standard deviation is c. 68%…

A:

Q: There are 10 employees working in a firm. Find the standard deviation for their age that is…

A: We have given date  20 22 34 51 38 19 26 28 31 29 We find standard…

Q: Two companies have the following sales results for a particular month. Company 1 Company 2 S 8000 S…

A: Here is given that, mean is 8000 and standard deviation is 500.

Q: a. Is there a significant difference on the ratings of the respondents on Product Line-X11) when…

A: Given information: The tables obtained using SPSS output are given.

Q: Use the following data for questions 1 to 5 to calculate the desired statistics. Scores given: 52,…

A:

Q: Find mean deviation of the following given below: B D E K M 1 No. of accidents 3 4 5 8 9. 10 11 12…

A:

Q: If an entire population with µ = 60 and σ = 8 is transformed into z-scores, then the distribution of…

A: Solution If X is a normally distributed random variable and X ~ N(μ, σ), then the z-score is:…

Q: . Calculate the standard deviation for

A: Here given grouped data for age and no. Of member

Q: Use the following information to answer questions 13-25: The height of 14 students in a class is…

A: Standard Deviation: It is a statistical measure that measures the dispersion of the dataset from…

Q: For the following calculate mean deviation using median. Height 55 56 57 58 59 60 No of Boys 25 40…

A: Answer is 0.9667

Q: 1. Suppose the mean number of days for a semester is 105 with a standard deviation of 10. How many…

A: From the given information we find the solution

Q: Use the following information to answer questions 13 - 15. The following frequency distribution…

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Q: 2. What is the variance of the first 10 numbers (1 to 10)? 3. What is the average deviation of the…

A: 2)Given dataset is 1,2,3,4,5,6,7,8,9,10sample size(n)=10

Q: A nationwide test taken by high school sophomores and Juniors has three sections, each scored on a…

A: Given : Mean =   = 49.2 Standard deviation =  = 10.6

Q: 4. A population has a standard deviation of o = a. On average, how much difference should exist be-…

A: The standard error of mean is, SE = σ/√n, where σ is the population standard deviation and n is the…

Q: The price to earnings ratio (P/E) is an important tool in financial work. A random sample of 14…

A:

Q: 14 For a data set, if the coefficient of variation (C.V.) is (24.23%) and the mean is (270), then…

A:

Q: The following data are taken from a study conducted by the National Park System on the temperatures…

A:

Q: 2. Below is the mean systolic blood pressure for men and women participating in a study: N Sample…

A: To calculate the estimated difference in mean systolic blood pressure between men and women and the…

Q: If the sampled population has a mean of u = 64 and a population standard deviation of o = 10, then…

A:

Q: .A company produces a light bulb that lasts for 1,200 hours. Periodically, the company gets…

A: Assume that μ is the population average lifetime of light bulb.

Q: Find mean deviation of the distribution given below : 0 12 3 4 15 16 21 10 No. of accidents 7 8 9 10…

A:

Q: Which of the following is (are) TRUE about Cochran’s Q? It is used to compare proportions when the…

A: Cochran's Q test :   The Cochran's Q test is used to see if there are differences between three or…

Q: Suppose that the mean and standard deviation of the scores on a statistics exam are 81.7 and 6.75,…

A: The question is about normal distribution Given : Popl. mean score on stats exam ( μ ) = 81.7 Popl.…

Q: A set of data is collected as follows: 55 34 67 83 21 98 63 72, the sample standard deviation of…

A:

Q: The average production cost for major movies is 58 million dollars and the standard deviation is 21…

A: As per our guidelines we are suppose to answer only three sub parts. Mean(μ)=58 Standard…

Q: Given population parameters for two populations, population 1 has a mean of 500 and a standard…

A: Given Information: Population 1: Mean μ= 500 Standard deviation σ= 50 Population 2: Mean μ= 21,000…

Q: Suppose students' exam scores are normally distributed with mean u = 65 and %3D standard deviation O…

A:

Q: Given the following data set for the amounts of sugar in a sample of 8 cereals (measured in grams):…

A: See the hand writing solution