a.Suppose that the mean retail price per litre of unleaded petrol in the greater region ofSydney is $1.96 with a standard deviation of $0.15. Assume that the retail price per litreis normally distributed. Use the empirical rule to answer the following questions:i.What percentage of unleaded petrol prices in the Sydney greater region fallsbetween $1.66 and $2.26 per litre?ii.Between what two values does the middle 99.7% of unleaded petrol prices inthe Sydney greater region fall?

Answered: Image /qna-images/answer/b2cea650-0574-46f4-832e-6646dfbb7dc8.jpg

Answered: a. Suppose that the mean retail price…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A study finds that the carapace length of an adult spider is normally distributed with a mean of 17.55 mm and a standard deviation of 1.42 mm. Let x denote carapace length for the adult spider. a. Sketch the distribution of the variable x. Choose the correct graph below. O A. B. C. -51 -34 1.42 37 54 13 15 17.55 20 22 b. Obtain the standardized version, z, of x. Choose the correct standardized version below. O A. (x- 17.55) Z= ов. (z- 17.55) 1.42 1.42 OC. (z - 1.42) D. (x - 1.42) 17.55 17.55 c. Identify and sketch the distribution of z. Choose the correct graph below. O A. ов. OC. 13 15 17.55 20 22 -2 -1 -2 d. Find the z-scores that correspond to the percentage of adult spiders that have carapace lengths between 16 mm and 17 mm. The percentage of adult spiders that have carapace lengths between 16 mm and 17 mm is equal to the area under the standard normal curve between (Round to two decimal places as needed.) and e. Find the z-score and direction that corresponds to the percentage of…
Calculate Range and Standard Deviation only
1. Commute the range for baseball coaches yearly salaries. 2. Compute the mean yearly salary. 4. Compute the variance and the standard deviation for the yearly salary. Show you calculation. 4. Compute the coefficient of the variation.
4. A study was conducted to investigate the relationship between the size of a house (in square feet) and the selling price of a house (in dollars). The response variable is price in dollars, and we want to study if the covariate of the square footage helps explain the response. A random sample of 522 houses was used, and the linear regression output from R is below. price sqft, data = house) 1m (formula = Coefficients: Estimate Std. Error t value Pr(>|t|) (Intercept) -81432.946 11551.846 -7.049 5.74e-12 *** sqft 158.950 4.875 32.605 < 2e-16 *** Residual standard error: 79120 on 520 degrees of freedom Multiple R-squared: 0.6715, Adjusted R-squared: 0.6709
A variable is normally distributed with a mean of 15 and a standard deviation of 4. a. Find the percentage of all possible values of the variable that lie between 10 and 23. b. Find the percentage of all possible values of the variable that are at least 7. c. Find the percentage of all possible values of the variable that are at most 8.
bing 13. Given the following data, calculate the standard deviation of the distribution: Cost 5 and under 10 and under 15 and under 20 and under 25 and under 10 15 20 25 30 10 6 1 Frequency 1 5
What is the level of measurement of the variable “age”? A. IQR B. Range C. Median D. Ordinal E. Mode F. Nominal G. Mean H. Interval/Ratio I. IQV J. Standard deviation
Which is the largest with regard to the following data set: the range or the standard deviation? 11 11 12 12 12 12 13 15 17 22 22 22 Standard Deviation Range
A quick survey of peanut butter prices had standard deviation and mean of $0.26 and $3.68, respectively. Compute the area for a peanut butter jar costing less than $3.50. Submit Question
Calculate the Mean and Std Deviation for: Statement 1 % 2 % 3 % 4 % 5 % N M SD I will consider visiting the same destination for my next tour 2.3 40.9 21.8 30.4 4.7 257 I will consider visiting the same travel agency for my next tour 1.2 7.4 37.7 47.5 6.2 257 I will consider switching to another airline for price and experience 0.4 3.5 10.1 74.7 11.3 257 I will consider switching to another travel agency that offers a cheaper package 0.4 12.5 18.7 59.1 9.3 257 I will consider switching to another hotel which is smaller and cheaper than the one I am used to 0.8 16.7 21.8 55.6 5.1 257

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