Exercise 3G 1 The table shows the average times, in minutes, that 100 people waited for a train. Frequency a Time [x minutes) 0≤x<2 2≤X<4 4≤x<6 6≤x<8 8
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- A roulette wheel has 30 slots, consisting of 2 blues, 8 whites, and 20 red slots. You will receive P100 if the roulette stops spinning on a blue slot, you will receive P50 on a white slot, but you will be penalized P10 if the roulette stops spinning on a red slot. Let X be the amount you will recieve (or pay). What are the possible values of X? x= 2, 8, 20 x= 100, 50, -10 x= 100, 50, 10 x= 30, 2,8, 20A student takes a true-false test that has 6 questions and guesses randomly at each answer. Let X be the number of questions answered correctly. Find P(Fewer than 4)Convert the equalities below to equalities by adding sack variables. Use s1 and s2 for your slack variables. 7x1+5x2≤517x1+5x2≤51 converts to _______ =51 13x1+8x2≤4213x1+8x2≤42 converts to ______ =42
- which of the following variables is not discrete? (multiple choice) a the number of words on an 8.5x11 inch sheet of paper b the number in a group of 20 people who have college degrees c the number of attempts needed in order to successfully complete d the distance traveled by motorcycle on one gallon of gas\ f the number of countries in which a college student is enrolledToss 5 coins 20 times simultaneously and observe the number of heads that will occur. The possible values of X or the number of heads in 5 coins tossed are 0, 1, 2, 3, 4, and 5.A market researcher's claim is that women spend more time each day on Facebook than men. If p1 represents the proportion of women on Facebook and p2 represents the proportion of men on Facebook, how would the researcher's claim be represented? a. p1 = p2 b. p1 > p2 c. p1 < p2
- There are 10 students in a cafeteria. If X denotes the number of males, what are the possible values of X?In Hawaii, January is a favorite month for surfing since 60% of the days have a surf of at least 6 feet.† You work day shifts in a Honolulu hospital emergency room. At the beginning of each month you select your days off, and you pick 5 days at random in January to go surfing. Let r be the number of days the surf is at least 6 feet.Solve the problem. Four brands of baseball bats were tested to determine which bat allowed hitters to hit a baseball farthest. Eight different batters were thrown 25 pitches while hitting with each of the four bats (assigned in random order). The average distance of the five longest hits using each bat is shown in the table below. The goal is to determine if the average hit distance differs for the four brands of baseball bats. Batter | Brand 1|Brand 2 | Brand 3 | Brand 4 315 1 307 300 275 310 317 305 285 3. 335 335 330 302 4. 325 328 320 300 300 305 295 270 345 350 340 310 7. 312 315 308 300 298 302 295 288 How should the data be analyzed? O Randomized block design with eight treatments and four blocks O Completely randomized design with four treatments O 4 x 8 factorial design O Randomized block design with four treatments and eight blocks
- Students at Bell Middle school are allowed to wear two different colors of uniform shirts a survey of students at the school shows that a student is three times more likely to wear a red shirt than a white shirt if a classroom has 28 students how many students are likely to be wearing red and how many are likely to be wearing whiteRecall the golf tournament example where the weather for the tournament is classified as “good”, “fair”, or “bad”. Further recall that the weather is “good” 60% of the time, and “fair” 30% of the time. Suppose spectator attendance will be 100,000 if the weather is “good”, 70,000 if the weather is “fair”, and 30,000 if the weather is “bad”. On average, how many spectators will attend? Determine the variance and standard deviation for the number of spectators.Suppose that we roll two fair six-sided dice and record the numbers showing as an ordered pair. Let Y denote the absolute value of the difference of the two numbers. Find ?(Y).