“Marriott International announced in November 2018 that attackers had stolen data

on approximately 500 million customers. The breach initially occurred on systems

supporting Starwood hotel brands starting in 2014. The attackers remained in the

system after Marriott acquired Starwood in 2016 and were not discovered

until September 2018.”(sourced from a published report)

Referring to the case given, list and explain 2 steps that can help prevent data breach like this.

Park Acreage A state executive claims that the average number of acres in western Pennsylvania state parks is less than 2000 acres. A random sample of 12 parks is selected, and the number of acres is shown. 2075 2065 2174 1934 2265 1936 2277 1968 2183 2029 1976 2151

a. At = 0.01, is there enough evidence to support the claim? Use the P-value method

b. Find the 99% confidence interval of the true mean.

You are given the following information about the stocks in a two-stock portfolio:

Correlation coefficient between the two stocks is 0.5.

Using the information above, calculate the following:

1. The expected return of the portfolio,
2. The variance of the portfolio,
3. The standard deviation of the portfolio.

（All calculations must be shown for intermediate calculations）

Aliens are observing a park in new york. They notice a merry-go-round has a radius of 3.12m and a moment of inertia of 3100kgm^2 at the vertical axis through the center. The contraption has been lubricated recently so there is no friction. one of the earthlings applies a tangential force of 19N for 13s begging at rest. Unfortunaley after gathering this data the aliens computer broke so now they must calculate the work that was done over the course of the 13s.

The marketing brochure for a travel agency shows that the standard deviation of hotel room rates for two cities is the same. Table 7is given the per day room rate in Pak Rs.

Can you reject the agency claim at α=0.05

“Marriott International announced in November 2018 that attackers had stolen data on approximately 500 million customers. The breach initially occurred on systems supporting Starwood hotel brands starting in 2014. The attackers remained in the system after Marriott acquired Starwood in 2016 and were not discovered until September 2018.”(sourced from a published report) Referring to the case given, list and explain 2 steps that can help prevent data breach like this.

Create a list and rank the following products/services using intangibility. The list will rank tangible goods at the top and totally intangible services at the bottom. Briefly explain each category as well.

C PROGRAMMING

Build a hotel management program. The user will register their name and put their check-in time and check-out time. They can choose their type of room they stay (Deluxe room, junior suite room, suite room, presidential suite room). Then, the program will determine the total price.

*NOTE
- Using modular, user-friendly, and array usage programming. Please don't use struct/structure and pointer.
- Please give explanation about the code.

Exercise 5A-2 Least-Squares Regression [LO5-11]

Bargain Rental Car offers rental cars in an off-airport location near a major tourist destination in California. Management would like to better understand the variable and fixed portions of it car washing costs. The company operates its own car wash facility in which each rental car that is returned is thoroughly cleaned before being released for rental to another customer. Management believes that the variable portion of its car washing costs relates to the number of rental returns. Accordingly, the following data have been compiled:

Exercise 5A-2 Part 2

2. Using least-squares regression, estimate the variable cost per rental return and the monthly fixed cost incurred to wash cars. (Round Fixed cost to the nearest whole dollar amount and the Variable cost per unit to 2 decimal places.)