5. A statistical report states that the 95% confidence interval for the mean salary of new job on a company is between 25500 OR and 25000 OR obtained from a sample of 15. Calculate the population standard division assuming that the population variance is unknown. A. 563.75 B. 451.40 C. 518.67 D. 534.18

Q: If the population mean and variance are 154 and 36 respectively, then the sample size that makes a…

A: Population mean = 154Variance = 36Standard error of the sample mean = 0.50

Q: Show hypothetical or imagined data on the scores of 10 students in a 50 – item test where the…

A: Given that a data on the scores of 10 students in a 50 – item test where the highest score is 48 and…

Q: 2. Define the moving average w, is the standard normal white noise, 500 EWitili?, t = 1,..., 1, 000.…

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A: A sample is a part of the population, which is selected from the population and if the sample is…

Q: 9. A simple random sample of 100 observations was taken from a large population. The sample mean and…

A: Given datan=100μ=80σ=12

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Q: 9. If the students who get the fastest 5% completion times will be exempted from the additional gym…

A: Let us assume X=the time it takes for grade 11 students in a certain school to complete a physical…

Q: 13.) In the following dataset: 2, 3, 3, 1, 4. What are the Mean and Standard Deviation (estimate of…

A: q-13 x x2 2 4 3 9 3 9 1 1 4 16 ∑x  = 13 ∑x2 = 39   sample size (n) = 5

Q: For the following questions,  = 10.00 and  = 5.00. Assume that the population data are normally…

A: Given Information: μ=10.00 σ=5.00 (a) Calculate the z-score for a raw score of 5.00. What proportion…

Q: Consider a sample data set with the summary statistics s= 78, Q₁ = 30, and Qu= 180. a. Calculate…

A: S=78,QL=30, Qu=180

Q: If C.V.=6.8 and variance is 4.36141 then mean = %3D O a. 30.7117 O b. 64.138 O c. 307.117 O d.…

A: C.V. is the coefficient of variation which is the ratio of standard deviation to the mean. The…

Q: Suppose that the true mean speed of cars in the school zone is actually 15 mph and the speeds we…

A: as the speed of cars in being measured in terms of the average, the parameter of interest is given…

Q: If C.V.=11. 23 and variance is 6.7832 then mean = a. 0.231919 b. 0.60402 c. 60.4024 d. 23.1919

A: Given information- Coefficient of variation, C.V. = 11.23 Variance, σ2= 6.7832 Therefore, the…

Q: 7. What type of statistical test should be used when the population is approximately normally…

A: When Population is normally distributed and population standard deviation is known we use the Z…

Q: sample of 100 observations was taken from a large population. The sample mean and the variance was…

A: Solution: Given information: n= 100  Sample size x=80  Sample mean s2=144 Sample variance s=s2s=…

Q: 12. Find the mean, median, and mode of the data. Heights of Students in Class. 4 60 62 64 66 68 70…

A: The dot plot for the heights of students in class is given.

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Q: 3. Given the following GPA for 4 students: 2, 3, 3, 4. Age of students are: 10, 11, 12, 15. There…

A:

Q: a. Find the mean, ss,variance, and standard deviation for these sample data 2,4,5,7,3,8,5,6 b.…

A:

Q: Compute the population variance of the data: 16,18,23,21,17,16,24,23,9,17,11,16,22,10,15,14. A.…

A: σ2= ∑(xi-x¯)2n

Q: If C.V.=6.8 and variance is 4.36141 then mean = a. 30.7117 b. 64.138 c. 641.38 d. 307.117

A: Given,C.V=6.8variance (σ2)=4.36141

Q: A population has a mean of u deviation of o = 10. a. If 3 points were added to every score in the…

A: (a) The population has mean 50 and population standard deviation 10. Calculation: If n points added…

Q: 8. Heights of 9-Year-Olds At age 9 the average weight (21.3 kg) and the average height (124.5 cm)…

A: Given, n1=60, x¯1=123.5, σ2=98n2=50, x¯2=126.2, σ2=120

Q: ith a mean of 110 and standard dev. of 15, find the 3 unique deviations to the left and right of the…

A: Deviations to the left   i) One standard deviation away from mean x = u - s x = 110 - 15 = 95   ii)…

Q: p) A small-town mechanic says that 8% his customers come in for an oil change. When 1000 samples…

A: Target population :-The target population is the population we are interested to do some research or…

Q: 1.For a symmetric data set with a mean of 11 and a variance of 25, approximately 68% of the values…

A: Solution: Given information: μ= 11  Population mean σ2= 25  Population variance σ= σ2σ=25σ= 5…

Q: a) b) c) Approximately how many scores are equal to or greater than 74? What score corresponds to…

A: As per guidelines i have calculated 3 subparts of first main question , kindly repost for Remaining…

Q: 4) Which of these samples would have the smallest standard deviation? a. 101, 92, 84, 131 b. -25,…

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Q: ch 11 end. 6: In a bumper test, three types of autos were deliberately crashed into a barrier at 5…

A: Given table :

Q: Question 9 A sample of 5 000 Johannesburg households is selected and sev statement that is correct.…

A: Continuous Quantitative data: The data which can be measured is known as continuous quantitative…

Q: "The weights of 1,000 children, in average, is 45kg with standard deviation of 18kg. Suppose the…

A: Given : No. of children (N) = 1000 The weights of children are  normally distributed with mean 45kg…

Q: 9.13 Given a sample size of 36, how large does the population standard deviation have to be in order…

A: It is given that Sample size, n = 36Note: According to Bartleby expert guidelines, we can answer…

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Q: 14. A researcher used to develop a problem-solving test to randomly selected 100 Grade 11 students.…

A: Given  n=11, x̄=90, s=sample standard deviations=4, population mean=μ=88  Note: According to…

Q: Q.1 Suppose samples are taken from a population of heifers with known mean and variance of weight…

A: