How many outcomes are there in the sample space? What's the probability that all 5 customers answered No connection issue? Let X denote the number of customers answered No -no connection issue in 2020. How many possible values of X are there? whats the expected value of x Whats the variance

Q: In a study of births in 2007, it was found that 51% were male and 49% were female. If 100 people are…

A: Given that there are 51% are male and 49% are female & if 100 people selected randomly we have…

Q: Data was collected from a simple random sample of 200 cell phone users age 18 or older in the United…

A: Introduction: It is of interest to test if the age-group of a person and whether or not they use…

Q: Provide an appropriate response. The random variable x represents the number of computers that…

A: Mean E[x] = ∑xP(x)

Q: Suppose you commit a crime. The way the judge is going to set your sentence is by pulling a number…

A: Given data X Frequency Probability P(X) X x P(X) X2  x P(X) 1 10 10/16 = 0.625…

Q: 33% of the Population has 20/20 vision if 70 individuals are selected at random from the Population…

A: Sample size : n = 70P(20/20 vision) : p = 0.33x = Number of people with 20/250 visionMean of X :  =…

Q: 5. A student plans to go sledding on the first snow day in December. The chance of snow on any given…

A: The given problem can be solved using the binomial distribution.  The formula of variance for…

Q: What are the degrees of freedom for the x² distribution for this test?

A: here from given data , no of rows =  r = 2 no of columns = c = 7

Q: Research has shown that the daily revenue (in thousands) of small businesses is a random variable X…

A: Solution: Let X be the daily revenue (in thousands) of small business. From the given information, X…

Q: What is the probability that the sampling error would be less than or more than 1.5 seconds

A: Given:mean µ = 30standard deviation σ= 2sample size n = 16 Let x̄ represent the sample mean time,…

Q: What is the probability that a z-score will be 0.92 or less?

A: The objective of this question is to find the probability that a z-score will be 0.92 or less. In…

Q: Suppose you are given a multiple-choice test with 10 questions, each with 4 answer choices. If you…

A: The question is about discrete prob. distribution Given : No. of multiple choice questions ( n ) =…

Q: Suppose i have an unfair coin and it lands on heads 75% of the time.  If I flip this coin four times…

A: Obtain the probability of getting only 1 head.   The probability of getting only 1 head is obtained…

Q: You randomly sample 300 graduating seniors and 40 indicate that they are going straight to graduate…

A:

Q: Approximately 27% of all people in the U.S. have blue eyes. Consider a grouping of 12 people, you…

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

Q: The percentage of students passing exam is 20% (assume every student takes the test). You randomly…

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

Q: How do you illustrate a normal random variable?

A: How do you illustrate a normal random variable?

Q: You intend to conduct a test of independence for a contingency table with 3 categories in the column…

A: We are givenNumber of rows = r = 2 Number of columns = c = 3

Q: Suppose that we did not know the probability of success but knew the sample size was 93 and that the…

A:

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: 65% of U.S. adults think that political correctness is a problem in America today. You randomly…

A: Given that  Success of probability p =0.65 Number of trials n=6 X~binomial ( n , p) NOTE:- According…

Q: Notice that the expected frequencies are missing. What are the correct expected frequencies?

A:

Q: If a condition has a 30% prevalence, what is the expected number of cases in a random sample of 200?

A:

Q: According to the American Red Cross, 8% of all Connecticut residents have type B blood. A random…

A: Let X be the number of CT residents who have type B blood which follows binomial distribution. Here,…

Q: A statistic is a random variable that depends only on the observed sample. True False

A: We have  Statistic: The function of sample.  i.e a random variable which depends on the sample

Q: What is the probability of observing a z score greater than 3?

A: From the provided information, The z score is greater than 3. That is P (z > 3)

Q: We say an outcome in the support of a random variable is significant if it lies outside of A. the…

A: The result - The random variable is significant.

Q: You intend to conduct a goodness-of-fit test for a multinomial distribution with 6 categories. You…

A: From the provided information, Number of categories (k) = 6 91 subjects were collected.

Q: A dry bean supplier fills bean bags with a machine that does not work very well, and he advertises…

A:

Q: Which of the following are the values of the chi-square statistic and P-value?

A:

Q: (b) If the mean of a random variable X is 40, what will be the mean of the sampling distribution of…

A:

Q: To conduct a hypothesis test comparing two population variances, both pop must be normally…

A: Assumptions for two sample variance test: Two populations should be normally distributed. Two…

Q: Suppose you have a loaded coin that when flipped is likely to land on heads about 20% of the time…

A: Here the probability of obtaining tails is given as 0.8, also the coin is flipped 3 times. So the…

Q: Given a normal population with mean = 39 and variance = 16, what is the probability of obtaining an…

A:

Q: A dentist hypothesizes that the average time a child spends brushing their teeth is less than 60% of…

A: In the given situation, the claim of the problem is "the average time a child spends brushing their…

Q: A recent national report states the marital status distribution of the male population age 18 or…

A: a.   Consider that pi’s are the proportion of never married, married, widowed and divorced,…

Q: The Humane Society of California reported in one of its most recent magazines that 11.6% of American…

A: Consider that p is the true population proportion of American adults, who have both a cat and a dog…

Q: If 11% of the population has a certain illness , what is the expected number of ill people in a…

A:

Q: A coach uses a new technique to train gymnasts. Seven gymnasts were randomly selected, and the…

A: 2 population is given

Q: Researchers studying starfish collected two independent random samples of 40 starfish. One sample…

A: The sample proportions for north and south are, The pooled proportion of p is,

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: What is the Discrete Variance when sample size is 82 with a probability of 0.82?

A: Formula for variance : Variance = np(1-p)

Q: How do you describe a discrete random variable?

A: A RANDOM VARIABLE IS A NUMBER GENERATED BY RANDOM EXPERIMENT RANDOM VARIABLES ARE OF TWO TYPES:…

Q: The probability of success is 0.725. You take a sample of 760. for a sample of size 760, what is…

A: From the provided information, Probability of success (p) = 0.725 Sample size (n) = 760

Q: college football coach was interested in whether the college's strength development class increased…

A: single population mean is being tested in this situation And distribution used here is t-test (…

Q: You decided to plant roses. The probability that a planted roses seed germinates is 0.80. You plant…

A: Consider X be a random variable which follows binomial distribution indicates the number of roses…