Problem Description:

Worldwide sales of mobile phones are a multi-billion dollar business. There is severe competition among the major manufacturers to attract higher sales and greater market shares. To achieve this, companies compete with each other on prices. However, for many customers, price may not be as important as the perceived quality of the phone, especially as many phones are offered at "zero price" under various plans and contracts from service providers.

Decision makers and markets at mobile-phone manufacturers would like to know what features of a mobile phone are important to consumers. This would be especially important in helping to design effective marketing and advertising campaigns. A review site reviewed 17 recent models of mobile phones and gave a score out of 100 points. Several characteristics of the phone including screen size, pixel density, battery life, weight of the phone and whether the phone had a microSD slot were included in the table.

You will use descriptive statistics, inferential statisticsand your knowledge of multiple linear regression to complete this task.

Score(Dependent Variable)and several characteristics (Independent Variables) are given in the Excel file: Thursday.xlsx.

Here is a table describing the variables in the data set:

Variable Definition

Score Review of phone in points between 0 and 100

Screen Size Screen size in inches

Pixel Density (ppi) Number of pixels per square inch in the screen

Battery Life The number of minutes that the phone lasts based on several real-world scenarios including video-use, video games and web browsing

MicroSD A dummy variable indicating that the phone has external storage capability

Weight (g) Weight of the phone in grams

Required:

A. Calculate the descriptive statistics fromthe data and display in a table. Be sure to comment on the central tendency,variabilityand shape for each variable.

B. Draw a graph that displays the distribution of review scores of the phones.

C. Create a box-and-whisker plot for the distribution of the battery life of the phones and describe the shape. Is there evidence of outliers in the data?

D. Visual clarity is cited as important factor for phones, especially after Apple released the iPhone with a retina display. What is the likelihood that a phone received at least an 80 mark if the phone had at least 500 pixels per inch?Is pixel density independent of the review score? Use a Contingency Table.

E. Estimate the 95% confidence interval for the population mean pixel density of the phones.

F. Your supervisor recently stated that battery life is no longer a major issue for phones as those in production today average at least 300 minutes. Test his claim at the 5% level of significance.

G. Run a multiple linear regression using the data and show the output from Excel.

H. Is the coefficient estimate for screen size different than zero at the 10% level of significance? Set-up the correct hypothesis test using the results found in the table in Part (G) using both the critical value and p-value approach. Interpret the coefficient estimate of the slope.

I. Interpret the remaining slope coefficient estimates.Comment on whether the signs are what you are expecting.

J. Interpret the value of the Adjusted R2. Is the overall model statistically significant at the 1% level of significance? Use the p-value approach.

K. Do the results suggest that the data satisfy the assumptions of a linear regression: Linearity, Normality of the Errors, and Homoscedasticity of Errors? Show using scatter diagrams, normal probability plots and/or histograms and Explain.

L. Based on the results of the regressions, is it likely that other factors have influencedthe review score? If so, provide a couple possible examples and indicate whether these would likely influence the regression results if they were included.

M. If a community housing organisation asked for information regarding the characteristics of housing targeting the households of Aboriginals and Torres Strait Islanders, explain whether a clustered sampling technique of the CBD would provide an accurate representation of these households. (Note: This question does not use the data)

Allocation of Marks:

Professional Business Report 2 Marks

Part A 1 Mark

Part B 1 Mark

Part C 1 Mark

Part D 2 Marks

Part E 1 Mark

Part F 1 Mark

Part G 1 Mark

Part H 2 Marks

Part I 2 Marks

Part J 1 Mark

Part K 3 Marks

Part L 1 Mark

Part M 1 Mark

Total: 20 Marks

Npvgo per share for ?rm : Suppose that the company changes its strategy. Starting next year, it will reinvest 30% of its earnings every year. As in part (b), the future investments will payo? 20% forever, starting a year after the reinvestment is made. What is the NPVGO pe.. |

Can the rn use acupressure for pain and discomfort : Identify and state which patient symptoms are more likely to be relieved by this treatment. Give the reasons to support this - state how the individual RN might incorporate acupressure into nursing practice. |

Calculate the shear stress due to the dipole on a parallel : Determine the positions of equilibrium of a positive edge dislocation on the y = k plane. |

Npvgo per share for ?rm : Suppose that the company changes its strategy. Starting next year, it will reinvest 30% of its earnings every year. As in part (b), the future investments will payo? 20% forever, starting a year after the reinvestment is made. What is the NPVGO pe.. |

Decision makers and markets at mobile-phone manufacturers : Worldwide sales of mobile phones are a multi-billion dollar business. There is severe competition among the major manufacturers to attract higher sales and greater market shares. |

Three-year property class : Suppose you bought a computer for $5,000 three years ago. It is depreciated as a three-year property class, where the percentages are 33.33%, 44.44%, 14.82%, and 7.41% for years 1 through 4, respectively. |

Illustrate the short-run effect of the open market operation : Graphically illustrate the short-run effect of the open market operations for the domestic money market, label, and explain your diagram. |

Calculate the variation of the glide force and climb force : Calculate the variation of the glide force and the climb force for the two dislocations as a function of the relative positions of the dislocations (i.e. as a function of θ). |

Design a small-signal midband common-emitter : Design a small-signal midband common-emitter (CE) amplifier with a BJT transistor having β of 160 and VBE of 0.7V. The dc bias is provided by the voltage-divider configuration |

## Difference between moral hazard and morale hazard why moraldifference between moral hazard and morale hazard why moral hazard is important concept to insurance |

## How much will he have to save each month in yearsHe can afford to save $4,100 per month for the next 10 years. If he can earn a 10 percent EAR before he retires and a 7 percent EAR after he retires, how much will he have to save each month in years 11 through 30? |

## Prepare journal entries to record the current tax liabilityDetermine the balance of any current and deferred tax assets and liabilities as at 30 June 2015, in accordance with AASB 112. Show all necessary workings - Prepare journal entries to record the current tax liability and deferred tax assets and liab.. |

## Case study-eat at my restaurantRead and complete case study, "Eat at My Restaurant" in your text. Address the following elements, which are also "required" elements at the end of the case study: |

## What is the effective rate of annual interestAn account earns 5% the first year, 7% the next 3 years, 8% the next 4 years and loses 3% each of the next 2 years. |

## Becky company began a defined benefit pension planBecky Company began a defined benefit pension plan on January 1, 2010. No prior service credit was granted to employees. Service costs amounted to $34,000 in 2010 and $37,000 in 2011. All contributions to the fund were made at the end of the year. At.. |

## Calculating balance sheet amounts based on the followingcalculating balance sheet amounts. based on the following data compute the total assets total liabilities and net |

## Design a risk management plan to copeDesign a risk management plan to cope with the exchange rate risk exposure |

## By how much will the depreciation change causeBy how much will the depreciation change cause (1) the firm's net income and (2) its free cash flow to change? Note that the company uses the same depreciation for tax and stockholder reporting purposes. |

## Compare and contrast the potential benefits of the domesticCompare and contrast the potential benefits of the domestic securities market to those investing in the foreign securities markets. Provide specific examples to support your response. |

## Steps necessary to conduct marketing researchThe final assignment is a paper that describes each of the steps necessary to conduct marketing research based on a specific marketing research problem. |

## What are the legal issues in this case is rod responsiblerod was driving a tractor-trailer when he struck a concrete barrier. the truck was stuck on top of the barrier and |

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd