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
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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
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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
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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
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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
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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
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Reflection statement. Creating my Vlog was a difficult however rewarding task due to the technological processes involved. I under took many steps to create my Vlog such as learning how to use editing programs and various other software on my computer as well as creating a Youtube account. I found the task of editing quite problematic at first but as I explored the program and went online to research how to use the software I guided my self in the right direction. After going online I quickly
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Self Assessment Doing Business for Humanity This is a guide to what I expected in an answer and the length. If I ask for 2 examples don’t waste time giving more. __________________________________________________________________________________ Q1. Give 2 examples of institutions used to distribute multi lateral aid The World Bank‚ IMF etc Q2. Briefly state what comparing actual amounts of a nation’s Aid giving from per capita amounts reveals. The absolute amount given by the US for example
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Expectations‚ Variances & Covariances The Rules of Summation n å xi ¼ x1 þ x2 þ Á Á Á þ xn covðX; YÞ ¼ E½ðXÀE½XÞðYÀE½YÞ i¼1 n ¼ å å ½x À EðXÞ½ y À EðYÞ f ðx; yÞ å a ¼ na x y i¼1 n covðX;YÞ r ¼ pffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi varðXÞvarðYÞ n å axi ¼ a å xi i¼1 n i¼1 n n i¼1 i¼1 E(c1X þ c2Y ) ¼ c1E(X ) þ c2E(Y ) E(X þ Y ) ¼ E(X ) þ E(Y ) å ðxi þ yi Þ ¼ å xi þ å yi i¼1 n n n i¼1 i¼1 å ðaxi þ byi Þ ¼ a å xi þ b å yi i¼1 n var(aX þ bY þ cZ ) ¼ a2var(X) þ b2var(Y ) þ c2var(Z
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