7.A research done by a group of researchers found the weight (in milligrams) forevery molecule as follows:ClassWeight (mg)33.33-43.326.43.33-53 .32753.33-63.3263.33 - 73.3273.33 83.329.83.33-93.321193.33-103.328103.33113.32Find the range, mean, variance and coefficient of variation (CV). (range-79.99,mean=76.17, variance=498.39 and coefficient of variation (CV)=29.30%)

Class Frequency (f) Mid value (x) f⋅x f⋅x2=(f⋅x)×(x) cf 33.33-43.32 6 38.325 229.95 8812.8338 6…

Answered: 7. A research done by a group of…

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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Identify the range, variance and standard deviation. show complete solutions
eat out or in The overall change in the consumer price index is a weighted average of changes in various categories. on november 19, 2011 the boston globe reported the data displayed in figure 5.7. is it reasonable to say that about 40% of food expenses are for food away from home?
3. A study on the length of a certain type of bacteria was conducted. The table below shows the data obtained from the study. Compute the 3 quartiles. Length (mm) Number of bacteria 31 - 35 26-30 8. 21 - 25 22 16 - 20 16 11 - 15 10 6- 10 4. 1-5 2. elow Compute fo
Suppose you are asked to toss a coin 16 times and calculate the proportion of the tosses that were heads. a. What shape would you expect this histogram to be and why? b. Where you do expect the histogram to be centered? c. How much variability would you expect among these proportions? d. Explain why a Normal model should not be used here.
A team of ten (10) construction workers who are working on a project are classified according to the skill levels, Classes A to D. The table below shows the number of workers in each of the four (4) classes and their respective hourly pay-rate. Pay-rate (Rands/hour) Number of workers Class A 80 Class B 60 Class C 55 Class D 50 4. Calculate the mean hourly pay-rate for the 10 workers. A. R24.50/hour B. R57/hour C. R57.50/hour D. R61.75/hour
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A statistical program is recommended. A paper gave the following data on n = 11 female black bears. Age(years) Weight(kg) Home-RangeSize (km2) 10.5 54 43.0 6.5 40 46.6 28.5 62 57.4 6.5 55 35.7 7.5 56 62.0 6.5 62 33.8 5.5 42 39.7 7.5 40 32.3 11.5 59 57.2 9.5 51 24.3 5.5 50 68.6 (a) Fit a multiple regression model to describe the relationship between y = home-range size and the predictors x1 = age and x2 = weight. (Round your numerical values to four decimal places.) = (b) If appropriate, carry out a model utility test with a significance level of 0.05 to determine if at least one of the predictors age and weight is useful for predicting home range size. State the null and alternative hypotheses. H0: ?1 = ?2 = 1Ha: at least one of ?1 or ?2 is not 1.H0: At least one of ?1 or ?2 is not 1.Ha: ?1 = ?2 = 1 H0: ?1 = ?2 = 0Ha: at least one of ?1 or ?2 is not 0.H0: At least one of ?1 or ?2 is not 0.Ha: ?1 = ?2 = 0 Calculate the test…
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1.11 A quick survey gives the price—an estimated average for a 170-gram can—for 14 different brands of water-packed light tuna, based on prices paid nationally in supermarkets. 1.01 1.92 1.22 0.84 0.65 0.52 1.41 1.14 0.65 0.66 0.71 0.60 0.61 0.67 Find the average price and average median price for the 14 different brands of tuna. (Round your answers to two decimal places and show answers.) Based on your findings, do you think that the distribution of prices is skewed? Explain. a) Since the median is higher than the mean, the distribution is slightly skewed to the left. b) More information is needed to determine skewness. c) Since the mean is higher than the median, the distribution is slightly skewed to the right. d) Since the mean and median are equal, the distribution is not skewed.
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HEIGHT OF GRADE 11 STUDENTS 150.8 cm 151 сm 160 cm 153.5 cm 165.3 cm 170.2 cm 167.5 cm 158.5 cm 174.6 cm 154.5 cm 140.8 cm 164.3 cm 170.4 cm 155 cm 160 cm 141 cm 150ст 163.5 cm 163 cm 161 cm Find: a. Mean b. Median c. Mode (identify the type of mode) d. Range e. Standard Deviation f. Variance g. Average Deviation h. Skewness (identify the skewness)
Group 1. Mean= 24.08 Group 2. Mean= 26.5 STD Dev= 4.42 STD Dev= 5.2 Sample Size=16 Sample Size=16 What is tcomputed =

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