Cyber Stalking Stalking: series of actions that would cause a person to fear death or injury Spam (Bulk email marketing) Internet version of junk mail Where do they get email addys? - legitimate companies - Newsgroup Extractors - Websites Extractors Avoiding Spam - Use phoney address - Use anonymous remailer - Use “AT” in your email address instead of @. Internet Fraud / Identity Theft Credit Card Fraud: The unauthorized use of credit cards to obtain money or property Common ways
Premium E-mail Domain Name System Internet
NB: when discussing globalisation some sources discuss remote events such as setting up of East India Company. As term ‘developing countries’ is used students should focus on modern post-colonial era – probably shouldn’t go further back than 1960s |Advantages |Disadvantages | |Multinational companies (MNCs) have more opportunities for Foreign |MNCs tend to use cheap labour – many jobs
Free Developing country Developed country Cyprus
90%= 1.645 95% = 1.96 98% = 2.33 99% = 2.575 Hypothesis Testing *A credit card company wondered whether giving frequent flyer miles for every purchase would increase card usage‚ which has a current mean of $2500 per year. They gave free flyer miles to a simple random sample of 25 card customers and found the sample mean to be $2542 and the standard deviation to be $109. n= 25 Ho (Claim) µ=2500 OR Ha µ > 2500 *Use t-table n .50 Ha
Premium Sample size Normal distribution Standard deviation
Practice Question #1: A gambler claims he can predict the roll of a die more often than chance would predict. To test this‚ a die is rolled 100 times and the gambler guesses the number that comes up twenty times and guesses incorrectly the other eighty times. Is this strong evidence that the gambler’s claim is true? a. Specify the null and alternative hypothesis for this problem. p = probability gambler guess correctly for an individual roll null (Ho): p = 1/6 alternative (Ha): p > 1/6 b
Premium Normal distribution Statistical hypothesis testing Statistics
Dynamics Test Review Dynamics: The study of forces that cause motion Types of Forces: can accelerate‚ deform‚ rotate measured in Newtons (N). Force of Gravity: force of attraction between all matter Force of Friction: force that resists relative motion of two surfaes. Always parallel to surface in contact Normal force: force of contact that exists between two surfaces Applied Force: the push or pull Tension Force: the force of a rope or a chain (can only pull) Air resistance: caused by a
Free Force Mass Classical mechanics
rectangles‚ and relationships are shown by lines between the rectangles. Attributes are generally listed within the rectangle. The many side of many relationships is represented by a crows footentity-relationship (E-R) modelA set of constructs and conventions used to create data models. The things in the users world are represented by entities‚ and the associations among those things are represented by relationships. The results are usually documented in an entity-relationship (E-R) diagramID-dependent
Premium Entity-relationship model
Independent sample T-test: * unknown variances * expected normal distribution * comparing means * (Als variantie bekend is dan z-test) * Analyse-compare means-independent sample t-test‚ define groups * H0: RateMen=RateWoman (do not differ) * Ha: Ratemen≠RateWoman (RateMen differs from RateWoman) * H0: u1 = u2 vs. HA: u1 ≠ u2 (this is two tailed ) also possible: * H0:uWomen≥ uMen vs. HA: uWomen0 OR d 6000 → Ha: p > 0‚5 of Ha≠0‚5 indien dubbelzijdig wilt
Premium Regression analysis Statistics Normal distribution
ACORN Market segmentation is about understanding the needs of customers & also how they decide between one offer to another. This insight is normally used to form groups of customers who share the same value criteria. Companies are then able to identify which group of customers it’s most likely to suit best & which product meets the needs of its chosen segments. The main objective of segmentation is based on how to win & retain the customers you want to serve. Characteristics are divided into different
Premium Coca-Cola Kate Moss Gender
What is Elasticity? - Elasticity refers to the degree of responsiveness in supply or demand in relation to changes in price. If a curve is more elastic‚ then small changes in price will cause large changes in quantity consumed. If a curve is less elastic‚ then it will take large changes in price to effect a change in quantity consumed. Graphically‚ elasticity can be represented by the appearance of the supply or demand curve. A more elastic curve will be horizontal‚ and a less elastic curve will
Premium Supply and demand
Shiana Gunasekera Lecture 2: GROUPS AND TEAMS *Groups/Teams – same - people with complementary skills‚ to achieve shared purpose and are held mutually responsible. *Formal Teams – officially recognised (organisational chart) and supported by the organisation for specific purposes. *Informal Teams- Natural or spontaneous relationship. No OC *Hierarchy – single person authority/performance responsibility. *Self-managed teams – decisions/complete work on own. Mutually responsible. Perform
Premium Management