Archive for the ‘reference’ tag
Choice All
What is the probability of getting all the right answers in the choice of 4 of 25 multiple choice questions?
If someone knows not the answers to all questions, and sat for an exam consisting of multiple choice. So what is the probability of obtaining good Election of response 4 to 25 multiple choice questions? And the chances of success from scratch?
Let X be the number of correct answers the student obtained in examinations. X has the binomial distribution with n = 25 trials and success probability p = 0.25. In general, if X has the binomial distribution with n trials and a probability of success p, then P [X = x] = n! / (X! (NX)!) * P ^ x * (1-p) ^ (NX) for values of x = 0, 1, 2, …, n P [X = x] = 0 for any value of x. The mass function of probability is obtained by examining the number of the combination of objects chosen objects XnY then a total of x success and n – x failures. Or in other words, the binomial is the sum of n independent trials and identically distributed Bernoulli. X ~ Binomial (n, p) the average binomial distribution is n * p = 6.25 of the variance of the binomial distribution is n * p * (1 – p) = 4.6875 standard deviation is the square root of the variance = √ (N * p * (1 – p)) = 2.165064 The mass function of probability, PDF, f (x) = P (X = x) P (X = 0) = 0.0007525435 P (X = 1) = 0.006271195 P (X = 2) = 0.02508478 P (X = 3) = 0.06410555 P (X = 4) = 0.1175268 P (X = 5) = 0.1645376 P (X = 6) = 0.1828195 P (X = 7) = 0.1654082 P (X = 
= 0.1240561 P (X = 9) = 0.0781094 P (X = 10) = 0.04165835 P (X = 11) = 0.01893561 P (X = 12) = 0.00736385 P (X = 13) = 0.002454617 P (X = 14) = 0.000701319 P (X = 15) = 0.0001714335 P (X = 16) = 3.571532e-05 P (X = 17) = 6.302704e-06 P (X = 18) = 9.337339e-07 P (X = 19) = 1.146691e-07 P (X = 20) = 1.146691e-08 P (X = 21) = 9.10072e-10 P (X = 22) = 5.515588e-11 P (X = 23) = 2.398082e-12 P (X = 24) = 6.661338e – 14 P (X = 25) = 8.881784e-16 Function distribution law, the CDF F (x) = P (X ≤ x): x Σ P (X = t) = t = 0 P (X ≤ 0) = 0.0007525435 P (X ≤ 1) = 0 , P 007023739 ( X ≤ 2) = 0.03210852 P (X ≤ 3) = 0.09621407 P (X ≤ 4) = 0.2137409 P (X ≤ 5) = 0.3782785 P (X ≤ 6) = 0.561098 P (X ≤ 7) = 0.7265062 P (X ≤ = 0.8505623 P (X ≤ 9) = 0.9286717 P (X ≤ 10) = 0.97033 P (X ≤ 11) = 0.9892657 P (X ≤ 12) = 0.9966296 P (X ≤ 13) = 0.9990842 P (X ≤ 14) = 0.9997855 P (X ≤ 15) = 0.999957 P (X ≤ 16) = 0.9999926 P (X ≤ 17) = 0, 999999 P ( X ≤ 18) = 0.9999999 P (X ≤ 19) ≈ 1 P (X ≤ 20) ≈ 1 P (X ≤ 21) ≈ 1 P (X ≤ 22) ≈ 1 P (X ≤ 23) ≈ 1 P (X ≤ 24) ≈ 1 P (X ≤ 25) = 1 1 – F (X) is: Σ N P (X = t) = T x = P (X ≥ 0) = 1 P (X ≥ 1) = 0, 9992475 P (X ≥ 2) = 0.9929763 P (X ≥ 3) = 0.9678915 P (X ≥ 4) = 0.903786 P (X ≥ 5) = 0.786259 P (X ≥ 6) = 0.6217215 P (X ≥ 7) = 0.4389019 P (X ≥ = 0.2734938 P (X ≥ 9) = 0.1494377 P (X ≥ 10) = 0.07132826 P (X ≥ 11) = 0.02966991 P (X ≥ 12) = 0.01073430 P (X ≥ 13) = 0.003370448 P (X ≥ 14) = 0.0009158314 P (X ≥ 15) = 0.0002145124 P (X ≥ 16) = 4.307886e-05 P (X ≥ 17) = 7.363541e-06 P ( X ≥ 18) = 1.060838e-06 P (X ≥ 19) = 1.271037e-07 P (X ≥ 20) = 1.24346e-08 P (X ≥ 21) = 9.676936e-10 P (X ≥ 22) = 5.762157e – 11 P (X ≥ 23) 2.465694e-12 = P (X ≥ 24) = 6.761258e-14 P (X ≥ 25) = 9.992007e-16
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Sound Choice CD+G 8917 All Made Up w/ No Place To Go 4 $17.95 |
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Baby Bib embroidered CUTE–your choice of which one-take a LOOK at all the pics $6.99 |
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Herbal Choice Mari Natural Organic Facial Rose Day Cream for All Skin Types $22.95 |
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Three AH 1370 (1950) Saudi Arabia 1 Riyals All Choice Uncirculated $36.00 |
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Three AH 1374 (1954) Saudi Arabia 1/2 Riyals All Choice Uncirculated $21.50 |
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STARWARS SET OF 4 CLONE TROOPER OFFICERS ALL 4 VARIANTS FANS CHOICE NM/M $30.00 |
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Cal Ripken Jr 1996 Collector’s Choice All-Star Card #1 Baltimore Orioles Mint $0.99 |
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Frank Thomas 1995 Collector’s Choice SE Silver Signature All-Star #235 White Sox $1.25 |
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1878 CC Morgan Dollar Set – All Tail Feathers – S Mint and CC – Choice BU – NICE $504.99 |
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Juan Gonzalez ’97 Collectors Choice All Star Connection $1.50 |
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The Economics of Sin: Rational Choice or No Choice at All, Samuel Cameron, Very $90.47 |
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SALE ELASTIC 1/4″ Velvet Nylon Ribbon 10 yards Your choice of all 15 colors $10.00 |
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2 Coin bears of your choice All new Limited Treasures $17.95 |
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Womens Reedition Wedge Sandals White Size 8 or 9 First Purchaser gets choice New $14.99 |
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1997 Collector’s Choice All-Star KEN GRIFFEY JR RARE RED SP INSERT! $0.99 |
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*WARTIME ” NETHERLANDS_ZINC 10 CENT_1942_ CHOICE Coin UA ** See all my coins..74 $0.89 |
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1997 Collector’s Choice All-Star Collection MANNY RAMIREZ INSERT! $0.68 |
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RED KEY DATE_ GERMANY_ 1976 1 CENT_ Choice Coin AU **See all my other coins.#108 $0.49 |
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1 Qt All Natural PCO CHOICE By CEDARCIDE Outdoor Pest Control Makes 20 Gallons $74.97 |
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$15 on card YOUR CHOICE OF ANY 1 NHL ALL TEAMs HOCKEY TIM HORTON’S QUICKPAY GIFT $19.99 |
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Ellis Burks 1997 UD Collector’s Choice ALL-STAR CONNECTION #42 – ROCKIES $0.50 |
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Sammy Sosa 1997 UD Collector’s Choice ALL-STAR CONNECTION #32 – CUBS $0.99 |
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Ken Caminiti 1997 UD Collector’s Choice ALL-STAR CONNECTION #21 – PADRES $0.50 |
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Roberto Alomar 1997 UD Collector’s Choice ALL-STAR CONNECTION #11 – ORIOLES $0.50 |
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Andres Galarraga 1997 UD Collector’s Choice ALL-STAR CONNECTION #28 – ROCKIES $0.50 |
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Mark McGwire 1997 UD Collector’s Choice ALL-STAR CONNECTION #1 – ATHLETICS $0.99 |
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Brady Anderson 1997 UD Collector’s Choice ALL-STAR CONNECTION #6 – ORIOLES $0.50 |
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Tony Gwynn 1997 UD Collector’s Choice ALL-STAR CONNECTION #23 – PADRES $0.99 |
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Andy Pettitte 1997 UD Collector’s Choice ALL-STAR CONNECTION #18 – YANKEES $0.50 |
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Manny Ramirez 1997 UD Collector’s Choice ALL-STAR CONNECTION #15 – INDIANS $0.75 |
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Pat Hentgen 1997 UD Collector’s Choice ALL-STAR CONNECTION #9 – BLUE JAYS $0.50 |
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Jim Thome 1997 UD Collector’s Choice ALL-STAR CONNECTION #3 – INDIANS $0.50 |
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Mike Piazza 1997 UD Collector’s Choice ALL-STAR CONNECTION #26 – DODGERS $0.99 |
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Robin Ventura 1997 UD Collector’s Choice ALL-STAR CONNECTION #12 – WHITE SOX $0.50 |
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Todd Hundley 1997 UD Collector’s Choice ALL-STAR CONNECTION #35 – METS $0.50 |
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Mo Vaughn 1997 UD Collector’s Choice ALL-STAR CONNECTION #37 – RED SOX $0.50 |
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Pat Hentgen 19997 UD Collector’s Choice ALL-STAR CONNECTION #9 – BLUE JAYS $0.50 |
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Javier Lopez 1997 UD Collector’s Choice ALL-STAR CONNECTION #44 – BRAVES $0.50 |
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Craig Biggio 1997 UD Collector’s Choice ALL-STAR CONNECTION #20 – ASTROS $0.50 |
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Frank Thomas 1997 UD Collector’s Choice ALL-STAR CONNECTION #10 – WHITE SOX $0.50 |
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Greg Maddux 1997 UD Collector’s Choice ALL-STAR CONNECTION #36 – BRAVES $0.99 |
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1997-98 UD Collectors Choice ALL-STAR Star Quest Insert #4 KARL MALONE JAZZ $2.99 |
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1997-98 UD Collectors Choice ALL-STAR Star Quest Insert #2 GARY PAYTON SONICS $2.99 |
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1997-98 UD Collectors Choice ALL-STAR Star Quest Insert #10 DIKEMBE MUTOMBO HAWK $2.99 |
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1997-98 UD Collectors Choice ALL-STAR Star Quest Insert #1 KOBE BRYANT LAKERS $6.99 |
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Beautiful Ladies High Heel Shoes Summer Classic All Sizes 5 6 7 8 & Color Choice $0.99 |
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1997 Terry Steinbach Twins Upper Deck Collector’s Choice All-Star #17 $1.25 |
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DJ’s Choice Hit Crew Sings All Request CD 10 Songs!!! $3.99 |
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1996 Coll Choice KEN GRIFFEY JR.All Star Connection #5 $0.49 |
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GYMBOREE 3-6 6-12 12-18 18-24 month 2T or 4T choice Cheery All The Way Shirt NWT $17.10 |
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GYMBOREE 3-6 6-12 12-18 18-24 month 2T or 4T choice Cheery All The Way Shirt NWT $17.10 |
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GYMBOREE 3-6 6-12 12-18 18-24 month 2T or 4T choice Cheery All The Way Shirt NWT $17.10 |
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GYMBOREE 3-6 6-12 12-18 18-24 month 2T or 4T choice Cheery All The Way Shirt NWT $17.10 |
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GYMBOREE 3-6 6-12 12-18 18-24 month 2T or 4T choice Cheery All The Way Shirt NWT $17.10 |
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GYMBOREE 3-6 6-12 12-18 18-24 month 2T or 4T choice Cheery All The Way Shirt NWT $17.10 |
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Black & Decker DCM18S Brew ‘n Go Personal Coffeemaker with Travel Mug $17.49 Great for commuters, office professionals, and one-coffee-drinker households, this personal coffeemaker brews 15 ounces of coffee directly into a stainless-steel travel mug. The mug has a rubber handle for a safe grip and a lid to keep coffee hot. It’s tapered to a 2-1/2-inch-diameter bottom, so it fits most vehicle cup holders. The coffeemaker itself is designed for an on-the-go coffee drinker. I… |
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Presto Pro EverSharp Electric Knife Sharpener $39.99 All kitchen and sporting knives, whether professional quality or inexpensive, need a blade tune-up now and then. This electric sharpener produces razor-sharp edges using the same rapidly rotating Sapphirite grinding wheels used by professional shops. A two-stage system allows knives to be ground and sharpened on the Stage 1 half of the machine, and then honed on the Stage 2 half. Blade guides hold… |
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Aroma AWK-115S Hot H20 X-Press 1-1/2-Liter Cordless Water Kettle $30.99 The Hot H20 X-Press from Aroma provides boiling water in a matter of minutes. The 1.5-liter capacity is ideal for a variety of uses–hot tea, soups, instant coffees, oatmeal, hot chocolate, noodles, baby formula and more. Once water reaches a boil, the kettle will automatically shut off and lifts off its base for easy, cord-free pouring. The beautiful polished stainless steel finish looks grea… |
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Choice of Weapon $15.98 Choice of Weapon is the follow up to the critically-acclaimed 2007 release Born Into This that the UK’s Mojo magazine called ‘a wholehearted, utopian and irrefutably exciting record.’ Long-time Cult collaborator and producer Bob Rock (Metallica, Bush), who produced one of The Cult’s most successful albums, the Platinum-certified Sonic Temple, put the finishing touches on the foundations that were … |
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Antennas Direct DB8 Multidirectional HDTV Antenna $64.59 This powerful multidirectional HDTV antenna lets you receive over-the-air high-definition signals and features up to a 15.8dB gain for improved reception…. |