2.10 Guessing on an exam: In a multiple choice exam, there are 6 questions and 4 choices for each question (a, b, c, d). Nancy has not studied for the exam at all and decides to randomly guess the answers. What is the probability that: (please round all answers to four decimal places) a) the first question she gets right is question number 4? b) she gets all of the questions right? c) she gets at least one question right?

Q: Thirty students took a calculus exam. Of the students who passed the exam, 8 students earned an A, 9…

A:

Q: Solve. In a survey of American women who were asked to name their favorite color, 12% said blue, 15%…

A: According to the given information, we haveA survey of American women who were asked to name their…

Q: A. For one question, what is the probability that a student will answer it correctly if he has 3…

A: A student is given a test consisting of 15 multiple choice questions, each having 3 possible…

Q: In a survey of 275 people, 258 expressed support for the governor. Find p and q, where p is the…

A: We have to find p and q.

Q: At a hot air balloon festival, Brooke made note of how many passengers were in each balloon and the…

A: Given,   Blue Yellow TOTALS 1 passenger 2 1 3 2 passenger 4 6 10 TOTALS 6 7 13

Q: In a multiple-choice exam, there are 5 questions and 4 choices for each question (a, b, c, d). Jimmy…

A: ` Here given that in a multiple choice question, there are 5 questions and 4 choices for each…

Q: A student must take a multiple choice exam with only one answer, the exam consists of 20 questions…

A: Let X =  number of correct answers X ~ bin (n , p) where, n = 20 p = probability of choosing the…

Q: Maya bought 8 seeds in order to plant a herb garden for her grandma. Of the seeds she bought, 6 were…

A:

Q: Suppose that you have 9 coins: 3 dimes, 4 quarters, and 2 nickels. Two coins are selected at random.…

A:

Q: Think of 12 face cards (four kings, four queens, and four jacks) from the four suits. What is the…

A: We have to find given probabilities

Q: A local county has an unemployment rate of 6.5%. A random sample of 17 employable people are picked…

A: Proportion that local county has a unemployment rate(p)=0.065sample size(n)=17

Q: Each column sums to 100%. There are about 100,000 men and 100,000 women in the workforce. Refer to…

A: Given information: Occupation sectors Gender Men Women Management 35 42 Service 14 20…

Q: There are 3 red, 1 blue and 2 purple marbles in a bag. Once a marble is selected, it is replaced.…

A: There are total (3+1+2)=6 marbles We can pick 2 marbles with replacement in 62 =36 ways     We can…

Q: Amy spins a spinner with equal sections numbered 1 through 5 and flips a fair coin. Which statement…

A: The objective of this question is to find the probability of two independent events occurring…

Q: Left handed & right handed players on a baseball team Nominal Ordinal Interval Ratio

A: There are two types of data: Quantitative and Qualitative, Quantitative data is a set of values…

Q: A final exam has 40 multiple choice questions. Each question has 5 possible answers, one of which is…

A: N = 40.Probability of correct answer: Probability of incorrect answer: A correct answer is worth 4…

Q: vision game show has 9 ​doors, of which the contestant must pick 3. Behind 2 of the doors are…

A: behind 2 doors the  expensive cars  behind 7 doors the consolation prizes total 9 doors   select 3…

Q: Mario has a number cube with wife’s numbered 1 through 6. He rolls the number cube twice. He rolls…

A: Solution of this question is

Q: At Central, there are 140 tennis players total on JV and Varsity. 90 are male, 50 are varsity, and…

A: From the given information. Total number of players = 140 Number of Male = 90 NUmber of varsity = 50…

Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.