In an original group, the probability of choosing a girl from that group was 1/3 When 1more girl joins the group, the probability of choosing a girl out of the group changes from 1/3 to 3/7 How many boys were there in the group originally?

Q: d. If 100 SAT scores are randomly selected, find the probability that they have a mean between 1400…

A: d. Z-score: The z score formula is, z=x¯-μx¯σx¯ In the formula, μx¯ is the population mean, σx¯ is…

Q: A group of people were asked if they had run a red light in the last year. 455 responded "yes", and…

A: The number of people who responded yes is 455 and the number of people who responded no is 310.

Q: Question 2 Mike is a first year university student who is trying to understand his financial…

A: We have to answer the questions based on given table.

Q: own that the probability of finding a job within the first 3 months after graduation is 40% for…

A: Given:  p = 0.40p=0.40 n= 2000n=2000 The mean is computed as: The standard deviation is computed…

Q: The following table presents the results of a survey in which 500 college students were asked…

A: Solution: The given data is

Q: Suppose that one variable, x, is chosen randomly and uniformly from [0, 5], and another variable, y,…

A:

Q: The Law of large numbers states that as the number of repetitions of an experiment n increases, the…

A: The law of large numbers is one of the important principles of probability. It states that as the…

Q: a. If a male passenger is randomly selected, find the probability that he can fit through the…

A:

Q: The closing price of Schnur Sporting Goods Inc. common stock is uniformly distributed between $20…

A: Given that  X is a continuous random variable.  Probability distribution function( pdf) X~U(a,b)…

Q: d. The probability that the child will be between 4.99 and 5.39 years old is e. If such a child is…

A: It is given that the age of children in kindergarten on the first day of school is uniformly…

Q: Suppose a die is weighted such that the probability of rolling a three is the same as rolling a six,…

A: Let the probability of rolling a six is= x So the probability of rolling a three is=x the…

Q: This problem involves the expected number of heads when flipping one of two coins. One coin is fair…

A: Since there are two coins, so the probability of picking each coin is 12. Probability of getting…

Q: the possible random samples with n = 81 scores are selected from a normal population with µ = 80 and…

A: Given data: Number of all possible random samples, n = 81 scores. Let X be the any randomly selected…

Q: Suppose that history shows that 70% of college students prefer Brand C cola. A sample of 5 students…

A: From the provided information, 70% of college students prefer Brand C cola that is p = 0.70 Sample…

Q: In a computer instant messaging survey, respondents were asked to choose the most fun way to flirt,…

A: GivenP(D) = 0.750where D is directly in person

Q: The probability that a regularly scheduled flight departs on time is P(D) = 0.83, the probability…

A: 5) Given information: P(D)=0.83 P(A)=0.82 P(DA)=0.78 a. The probability that a plane arrives on time…

Q: If two dice are rolled one time, find the probability of getting a sum of greater than 5. O A.…

A: The outcomes after rolling 2 dice one at a time. 1,1) (1,2) (1,3) (1,4) (1,5) (1,6) (2,1) (2,2)…

Q: A research center claims that 26​% of adults in a certain country would travel into space on a…

A: a) Assume that p is the true percentage of adults in the country, who would travel into space on a…

Q: QUESTION 9 Giving a test to a group of students, the grades and gender are summarized below Grades…

A: Given,   A B C Totals Male 18 13 2 33 Female 15 7 5 27 Totals 33 20 7 60

Q: Question # 2. Suppose that at a particular air quality monitoring station, the monitoring devices…

A: Given information: It was stated that a particular air quality monitoring station, the monitoring…

Q: Suppose you want to determine if the number of hours studying for an exam is associated with the…

A: ( a ) Construct a Scatterplot ( b ) r =? ( c ) Hypothesis test

Q: The figure below shows the probability that a person selected at random has a particular voting…

A: Given information: Scores less than 0.50 indicates a tendency to not want to vote. Scores above 0.50…

Q: Suppose a math class contains 37 students. There are 16 females (six of whom speak Spanish) and 21…

A:

Q: 3/1000 of the parts produced on a machine are faulty. From 600 pieces randomly selected from…

A:

Q: Question 6 options: After a serious crime was committed in a small town: The police are going to…

A:

Q: The probability of a student getting an A grade in a statistics class is 0.24 and that of getting a…

A: From the provided information, The probability of student getting an A grade in statistics = 0.24…

Q: Use the following table to find the probability.   Male Female Write with left hand 55 38 Do not…

A: 1. Consider the following table for necessary calculations.   Male Female Total Write…

Q: The following table represents the highest e residents in a certain town. If an adult is ch…

A: Given:  To find: Probability that the chosen person has high school or college degree

Q: Part 4 of 6 (c) Find the probability that the proportion of individuals in the sample of 65 who have…

A: Given p=0.23, n=65

Q: 2) This question uses the data from above. For each of the following, show how to compute the…

A: 2)a) The required probability (breast cancer present) can be obtained as:

Q: took many, many additional samples and from each computed a 95% is a 95% probability that the true…

A: A confidence interval gives you a brief idea about how much uncertainty present in particular…

Q: 1. The Journal of the National Cancer Institute published the following results from a study they…

A: Introduction: The probability of an event, A is defined as the ratio of the number of cases…

Q: a) Defective rate in a production has been found to be 15%. What is the probability that there are 2…

A:

Q: A die is weighted so that the probability of a 1 is 0.2, the probability of a 2 is 0.2, the…

A: The minimum number that the die can take =1. Therefore if every time the die shows the minimum…

Q: Q1) A box containing a group of balls (blue and red) totaling 25 balls. If another Five blue balls…

A: Given that, A box containing a group of balls (blue and red) totaling 25 balls. If another Five blue…

Q: Question 8: 8.1. If the mean value for the cashier to checkout of a market is 3 minutes. What is the…

A: In question, Let X denote the time in which the cashier to checkout of a market. Then X~Poisson(3)…

Q: Question 4 The probability that your call to a service line is answered in less than 30 seconds is…

A:

Q: Step 3 Now we are to decide whether a Brand X user is or is not more likely to give up doing laundry…

A: Given, P(G

Q: Based on a​ poll, among adults who regret getting​ tattoos, 17% say that they were too young when…

A: Let X is the random variable representing the number of adults who regret getting​ tattoos. Given:…

Q: The odds against student X solving a Business Statistics problem are 8 to 6, and odds in favour of…

A:

Q: Question 2 options: Statistical data for a particular city in Canada in 2013 shows that the number…

A: From the provided information, The number of residents between ages of 20 and 34 was 149745. 113900…

Q: What is the chance of winning the vacation given a contestant has 1 in 3 chance of selecting the…

A: Probability The term probability is defined as the chance of occurrence of an event. The probability…

Q: Express the indicated degree of likelihood as a probability value.

A: here given, "You have one chance in ten of winning the race"

Q: In a computer instant messaging survey, respondents were asked to choose the most fun way to flirt,…

A: Given that, P(D) = 0.680 D is directly in person.

Q: A university advertises that 90% of the graduates from their school of science find a job within one…

A: If the sample size is greater than 30 and the variables are independent. Also X is the number of…

Q: The table shows the​ distribution, by age and​ gender, of the 29.0 million people in a certain…

A: Data about 29.0 million Americans living alone is shown in the table below:

Q: Question 3 1 - Assume the probability of success p = 0.15, according to the geometric distribution:…

A: Given data : Probability of success , p = 0.15

Q: Michael is given 5 wads of paper to shoot into the basket, with a 90% accuracy rate. What is the…

A: We have to find probability that Michael will be successful with at least 4 of those shots

Q: d. If one randomly selected runner is timed, find the probability that this runner's time will be…

A: Given n=10 μ=25σ=2.7

Q: The bottom panel of figure 1 (p. 311) shows the probability histogram for the total number of spots…

A: Here probability histogram given Area under the histogram =? 1 -  chance that the total no. Of spots…

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.