Determine the expected number and variance of male children.

Q: a. What is the expected number of children that should report cognitive impairment related symptoms…

A: 4. A research program is concerned about the potential exposure to hazardous lead levels at a…

Q: Explain the probability distribution of Size n random distribution?

A: The probability distribution of size n for random variables describes how the probabilities are…

Q: Explain the Difference between the sample space and random variables?

A: Sample space: The sample space is the collection of all outcomes, if a random experiment is…

Q: Find the expected value of the sum obtained when n fair dice are rolled.

A:

Q: Why is it important for the researcher to use probability sampling methods?

A: For a sampling method to be considered probability sampling, it must utilize some form of random…

Q: What is a random variable?

A: A random variable is a variable whose possible values are numerical outcomes of a random phenomenon.…

Q: Explain the two different types of random variables?

A:

Q: What is a discrete random variable?

A: DISCRETE RANDOM VARIABLE →Discrete random variable is a random variable with a finite or a countable…

Q: What is the expected frequency for a Male Shopper to regularly shop at a Grocery Chain?

A: HERE USE GIVEN CONTINGENCY TABLE   Grocery chain Discount store  Membership warehouse  Total…

Q: What is the probability of selecting a sample with the proportion of females being 0.56 or greater?

A: here p =  proportion of female in US =  0.51  n = 500

Q: identify two methods for obtaining a simple random sample

A: The two methods for obtaining a simple random sample are:Lottery method: In this method of random…

Q: A couple wishes to have children until they have exactly two female children in their family. What…

A: The couple wishes to have two girl child.So, r=2and the probablity of male child is 0.5=qSo, the…

Q: • Enumerate and differentiate the approaches in calculating probabilities.

A: We have to define the different approaches of calculating probabilities:

Q: How to Assign Subjects in random assignment?

A:

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

A:

Q: Define the Mean and Variance of Sums of Random Variables?

A: The mean of a random variable X is a weighted average of the possible values that the random…

Q: A fair coin is tossed 50 times, what is the mean and variance of getting a tail?

A: Since , the fair coin is tossed 50 times. Our aim is to find the mean and variance of getting tail.…

Q: what is the expected number of tails?

A:

Q: Enumerate and differentiate the approaches in calculating probabilities.

A: Since the question number is not specified, we'll be answering the first question only. Please…

Q: If you toss a coin (assume p = 0.5) and repeat this experiment 100 times, What is the probability of…

A: From the provided information, Number of experiment (n) = 100 Probability of getting tail (p) = 0.5

Q: construct a probability distribution of family planning consists of 5 family members

A: Let a random experiment be performed repeatedly, each repetition is called a trial. let the…

Q: Suppose that a high school student is preparing to take the SAT exam. Explain why his or her…

A:

Q: What is the probability that a sample size 7 out of 15 identified people will have a mean of weight…

A:

Q: what is the expected number of participants who arrived from 8 to 10 am?

A: Here Given  Arrival Rate= 5 per hour  No of team member in each team is Independent and takes value…

Q: What is the expected value for the number of defective LCD

A: The number of LCDs (n) is 5.

Q: Why can we consider the sample mean in random samples of size n from a given population to be a…

A: We consider the sample mean in random samples of size n from a given population to be a random…

Q: How do I find a pooled variance of 2 sample groups?

A: There are two sample groups.

Q: Differentiate between the probability and non-probability sampling

A: In probability sampling each sample is equally likely to be in the sample.  Here the samples are…

Q: (i) What is the mean number of cards held by a person from this group? (ii) What is the variance of…

A: Given: Y   X 0 1 2 3 4 Total 1 0.08 0.13 0.09 0.06 0.03 0.39 2 0.03 0.08 0.08 0.09 0.07…

Q: Explain about the Probability of a Particular Sample Mean.

A: Solution: Sample mean :  Sample mean is simply the average of all the measurements in the sample. If…

Q: what is the expected number of failures?

A: here p =  proportion of female in US   p = 0.51  n = sample size = 500 here consider p = proportion…

Q: What is the probability of getting a sample in which more than 70% think that airplanes would be…

A: Let p be the true proportion of adults who think airplanes would be safer places if airlines…

Q: When two dice are thrown, find the expected values of the sum of number points on them.

A: Answer: For the given data,

Q: What is the missing probability? What is the median of this distribution?

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Q: pooled variance is 135.

A:

Q: In tossing 2 fair​ coins, what is the expected number of​ heads? Let the random variable X represent…

A: Probability: Probability is a chance factor that occurs at every outcome of a random experiment.…

Q: Calculate the variance of a sample for which n=5, sigmax^2=1320, sigmax=80

A: Given data n=5∑x2=1320∑x=80

Q: What is the expected count a for the number of people ages 11- 25 who prefer piglets?

A:

Q: (4) Are the population mean and variance random variables? Why? Are the sample mean and variance…

A: Note: Hi! Thank you for the question. As questions 4 and 5 are independent questions, according to…

Q: 5.What is the benefit of random selecting single sample from a population

A: Asked about  benefits of random sampling :  Random sampling : Selecting a sample from population in…