Seventy percent of bicycles sold by a certain store are mountain bikes. Let X be the number of 100 randomly selected purchases that are for mountain bikes. Verify the binomial setting. Verify that the sampling distribution of X is approximately normal. What is the approximate probability that At most 75 are mountain bikes? Between 60 and 75 (inclusive) are mountain bikes? More than 80 are mountain bikes?

Q: There were 20 multiple choice questions on Exam 2. The probability of getting the right answer on…

A: Given Information: n=20p=25%=0.25To find out the probability that a student who did not study would…

Q: of the parts produced by a particular machine, 0.8% are defective. If a random sample of 7 parts…

A: According to the given information, The probability of success in a trial is :-P = 0.8%  =…

Q: A college student is conducting a survey to see if students prefer cats or dogs. They survey 100…

A: A discrete random variable X is said to follow the binomial distribution if its p.m.f is given by:

Q: What is mean and variance of the probability distribution?

A:

Q: Suppose that the speed at which cars go on the freeway is normally distributed with mean 71 mph and…

A: Solution: Let X be the speed for a randomly selected car. From the given information, X follows…

Q: A random variable X can takes values 1,2,3 or 4 with probabilities 0.6,0.2,0.15 and 0.05…

A:

Q: Suppose that the speed at which cars go on the freeway is normally distributed with mean 71 mph and…

A: b) Given that μ=71 and σ=9. Let X be the speed for a randomly selected car. The probability that it…

Q: In an certain species of newt, offspring are born either green or black. Suppose that 60% of these…

A: Given Information:Sample proportion() = 60% =0.6Sample size (n) = 185

Q: Suppose that the speed at which cars go on the freeway is normally distributed with mean 71 mph and…

A:

Q: Q2. Identify the Incorrect statement. In a Binomial Distribution each trial: A. Has the same 2…

A: we know; in a binomial distribution- 1. each trials are independent. 2. each trials has only 2…

Q: Suppose that the speed at which cars go on the freeway is normally distributed with mean 70 mph and…

A: Given Mean=mu=70 Standard deviation=sigma=10

Q: According to the University bookstore records, 60% of the students purchase a hard copy of…

A: Here, Significance level not given, if not given consider it 0.05 (5%)

Q: each score in a random sampling distribution represents what

A: We have given that  We have to define each score in a random sampling distribution :

Q: Suppose that a box contains 7 cameras and that 5 of them are defective. A sample of 2 cameras is…

A: Given that a box contains 7 cameras and that 5 of them are defective. So (7-5)=2 are good. A sample…

Q: 4. A sample mean has a z= +1.0 on the sampling distribution created from the population of…

A:

Q: Suppose that the speed at which cars go on the freeway is normally distributed with mean 71 mph and…

A:

Q: Suppose you have a bucket of 150 balls: 47 red, 62 blue, and 41 green. Describe the distribution for…

A: Given that there are 150 balls. Among 150 balls, 47 red, 62 blue, and 41 green.  P(green…

Q: About 61% of US adults want to reach their 100th birthday.  You randomly select 8 US adults.  The…

A: given data  P9reach their 100th birthday) = p = 0.61 sample size (n) = 8 x = no. of people reach…

Q: Suppose a biologist is interested in monitoring the number of oak trees with oak wilt per acre. The…

A:

Q: You might think that if you looked at the first digit in randomly selected numbers that the…

A: Introduction: Denote pi as the true probability that the ith digit is the first digit in a randomly…

Q: 9. During an independent research, 2500 randomly selected people were interviewed whether they visit…

A: Given The data is as follows:Sample size, n=2500 Sample proportion, p=0.7

Q: Suppose that the speed at which cars go on the freeway is normally distributed with mean 75 mph and…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: gg. Assume that those outcomes are equally likely. Construct describes the sampling the sample…

A: The question is about sampling distribution Given : Sample space when two births are selected…

Q: Suppose you are playing a game and you get to roll 40 six-sided dice on your next turn. If you get a…

A: Solution: Given information: n= 40 Sample size  μ= 3.5   Population mean σ= 1.71   Population…

Q: You might think that if you looked at the first digit in randomly selected numbers that the…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub- parts for…

Q: 62% of adults in a population have an HDTV in their home. You randomly select 45 adults and ask them…

A: The population proportion of adults on the population with an HDTV in the home,…

Q: Suppose that the speed at which cars go on the freeway is normally distributed with mean 79 mph and…

A: Given :μ=79σ=9X~N(μ=79,σ2=(9)2)

Q: Use the scenario below to determine the correct values of n, p, q and x of the binomial…

A:

Q: Suppose that the speed at which cars go on the freeway is normally distributed with mean 80 mph and…

A: Note: Please repost part d as i can answer only 3 subparts as per my policy.   Given data, μ=80σ=5

Q: Suppose that the speed at which cars go on the freeway is normally distributed with mean 69 mph and…

A: Z-scores are the scores associated with the standard normal distribution.  Given a random variable X…

Q: hree randomly selected households are surveyed. The numbers of people in the households are 1​,4​,…

A: Given Information: Population consists of 1, 4 and 10 Samples of size n=2 are randomly selected with…

Q: A distribution has a mean of 9, a median of 9, and a mode of 9. What is the shape of this…

A: From the provided information, Mean = 9 Median = 9 Mode = 9