### Graphs and Analysis#### Graphs C and D:These scatter plots illustrate the relationship between two variables: the speed of execution rating (x-axis) and the overall satisfaction rating for electronic trades (y-axis).- **Graph C** shows a distribution of points with varying satisfaction levels for different execution speeds.- **Graph D** appears to have a different distribution pattern, possibly indicating a stronger relationship between speed of execution and satisfaction.### Questions and Instructions**b. Analysis of Scatter Diagrams:**- What does the scatter diagram developed in part (a) indicate about the relationship between the two variables?- The scatter diagram indicates a [dropdown menu] linear relationship between \( x = \) speed of execution rating and \( y = \) overall satisfaction rating for electronic trades.**c. Regression Equation:**- Develop the least squares estimated regression equation. Enter negative values as negative numbers. **Satisfaction =** \[ \text{____} \] + \[ \text{____} \] \(\times\) Speed (to 4 decimals)**d. Interpretation of Slope:**- Provide an interpretation for the slope of the estimated regression equation.- The slope of the estimated regression line is approximately \[ \text{____} \] (to 4 decimals). So, a one-unit [dropdown menu] in the speed of execution rating will increase the overall satisfaction rating by approximately [dropdown menu] points (to 1 decimal).**e. Prediction:**- Suppose Scottrade, Inc. developed new software to increase their speed of execution rating. If the new software is able to increase their speed of execution rating from the current value of 2.4 to the average speed of execution rating for the other 10 brokerage firms that were surveyed, what value would you predict for the overall satisfaction rating? **Prediction:** \[ \text{____} \] (to 3 decimals) These activities are intended to help understand the statistical relationships and the interpretation of regression analysis in practical scenarios. ### On-Line Discount Broker Survey ResultsThe American Association of Individual Investors (AAII) conducts an On-Line Discount Broker Survey to collect members' experiences with discount brokers. Participants rated the quality of the speed of execution and overall satisfaction for electronic trades. Ratings were given on a scale from 1 (unsatisfied) to 4 (very satisfied), with an average summary score calculated for each broker.#### Survey Data:| Brokerage | Speed | Satisfaction ||----------------------------------|-------|--------------|| Scottrade, Inc. | 2.4 | 2.4 || Charles Schwab | 2.8 | 3.3 || Fidelity Brokerage Services | 3.9 | 3.9 || TD Ameritrade | 3.3 | 3.0 || E*Trade Financial | 4.0 | 3.7 || Vanguard Brokerage Services | 2.5 | 2.4 || USAA Brokerage Services | 2.9 | 2.9 || Thinkorswim | 3.8 | 3.9 || Wells Fargo Investments | 3.8 | 3.3 || Interactive Brokers | 2.6 | 2.2 || Zecco.com | 4.0 | 3.8 |### Scatter Diagram Selection#### Explanation:Two scatter diagrams (A and B) are provided for visual comparison of "Speed of Execution" vs. "Satisfaction" ratings for the brokers, with "Speed of Execution" as the independent variable (x-axis).- **Scatter Diagram A:** Displays various data points where x-axis represents speed (ranging from 2.0 to 4.5) and y-axis represents satisfaction (ranging from 2.0 to 4.5). The points are scattered with no apparent trend line.- **Scatter Diagram B:** Similar layout with the x-axis for speed and y-axis for satisfaction. Shows more structured dispersion with potential indication of relationship between higher speed ratings and higher satisfaction ratings.Choosing the appropriate scatter diagram involves determining which best represents the data correlation based on the axes alignment and point dispersion.

The independent variable is Speed. The dependent variable is Satisfaction. We have to do regression…

Answered: The American Association of Individual…

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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An insurance company offers four different deductible levels—none, low, medium, and high—for its homeowner's policyholders and three different levels—low, medium, and high—for its automobile policyholders. The accompanying table gives proportions for the various categories of policyholders who have both types of insurance. For example, the proportion of individuals with both low homeowner's deductible and low auto deductible is 0.07 (7% of all such individuals). Homeowner's Auto N L M H L 0.04 0.07 0.05 0.01 M 0.07 0.11 0.20 0.10 H 0.02 0.03 0.15 0.15 Suppose an individual having both types of policies is randomly selected. (a) What is the probability that the individual has a medium auto deductible and a high homeowner's deductible?(b) What is the probability that the individual has a low auto deductible? A low homeowner's deductible? auto deductible homeowner's deductible (c) What is the probability that the individual is in the same…
Hi, please answer both. Thanks!
Socially conscious investors screen out stocks of alcohol and tobacco makers, firms with poor environmental records, and companies with poor labor practices. Some examples of "good," socially conscious companies are Johnson and Johnson, Dell Computers, Bank of America, and Home Depot. The question is, are such stocks overpriced? One measure of value is the P/E, or price-to-earnings ratio. High P/E ratios may indicate a stock is overpriced. For the S&P Stock Index of all major stocks, the mean P/E ratio is ? = 19.4. A random sample of 36 "socially conscious" stocks gave a P/E ratio sample mean of x = 17.7, with sample standard deviation s = 5.2. Does this indicate that the mean P/E ratio of all socially conscious stocks is different (either way) from the mean P/E ratio of the S&P Stock Index? Use ? = 0.05. (a) What is the level of significance?State the null and alternate hypotheses. H0: ? = 19.4; H1: ? < 19.4H0: ? ≠ 19.4; H1: ? = 19.4 H0: ? = 19.4; H1: ? ≠ 19.4H0: ?…
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Westminster Financial has released a summary of investment package information from the past fiscal year. During this time, Westminster provided a choice among twelve pre-designed investment packages. Westminster classified the packages into three categories according to riskiness. We're interested in the possible relationship between the age of an investor and the riskiness of the investment package she chose. So, there are two variables under consideration: age of Westminster investor ("under 35", "35-49", or "50+") and riskiness of investment choice ("risky", "moderate/mixed", or "conservative"). The contingency table below gives a summary of the information released by Westminster regarding age and riskiness of investment package for a random sample of 150 investors. Each cell of the table contains three numbers: the first number is the observed cell frequency (fO); the second number is the expected cell frequency (fE) under the assumption that there is no relationship between the…
An insurance company offers four different deductible levels-none, low, medium, and high-for its homeowner's policyholders and three different levels-low, medium, and high-for its automobile policyholders. The accompanying table gives proportions for the various categories of policyholders who have both types of insurance. For example, the proportion of individuals with both low homeowner's deductible and low auto deductible is 0.05 (5% of all such individuals). Auto L M H Homeowner's N L M H 0.04 0.05 0.05 0.02 0.07 0.12 0.20 0.10 0.02 0.03 0.15 0.15 Suppose an individual having both types of policies is randomly selected. (a) What is the probability that the individual has a medium auto deductible and a high homeowner's deductible? (b) What is the probability that the individual has a low auto deductible? A low homeowner's deductible? auto deductible homeowner's deductible (c) What is the probability that the individual is in the same category for both auto and homeowner's…
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Socially conscious investors screen out stocks of alcohol and tobacco makers, firms with poor environmental records, and companies with poor labor practices. Some examples of "good," socially conscious companies are Johnson and Johnson, Dell Computers, Bank of America, and Home Depot. The question is, are such stocks overpriced? One measure of value is the P/E, or price-to-earnings ratio. High P/E ratios may indicate a stock is overpriced. For the S&P Stock Index of all major stocks, the mean P/E ratio is ? = 19.4. A random sample of 36 "socially conscious" stocks gave a P/E ratio sample mean of x = 17.8, with sample standard deviation s = 5.8. Does this indicate that the mean P/E ratio of all socially conscious stocks is different (either way) from the mean P/E ratio of the S&P Stock Index? Use ? = 0.05. I need help with sketching (d) and (e)
Razor LLC has a data warehouse that is used by several analytics groups. The data warehouse consists of a number of distinct components, including a cloud server (99.999% availability), a database management system server (99.4%), an analytics logic server (94.7%), and, of course, the network infrastructure to the cloud server, which has an availability of 99.9%. What is the overall availability of the system, expressed as a percentage with three digits of precision? For example, enter 91.223, but do not enter a percent symbol, i.e., do not enter 91.223%

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