Describe the types of probability samples and discuss under which conditions they may be the most appropriate.
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- Describe the types of probability samples and discuss under which conditions they may be the most appropriate.
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- Below is a distribution of race in the United States from 2014. White= 60.5% Black= 12.5% Hispanic= 18.3% Asian= 5.7% Other= 3% If we were to randomly choose 150 people for a survey, what is the probability that less than 70 of them would be white (round to 3 decimal places)? Would this be unusual? If so, give some reasons why a particular sample might have less than 70 whites. What is the probability that we would randomly choose a sample of 150 people and more than 22 of them were black (to 3 decimal places)? What is the probability you would randomly select two Americans and they would both be white? How many Asian people should we expect to have in a randomly selected group of 150 people?A genetics experiment involves a population of fruit flies consisting of 3 males named Andre, Barry, and Carl and 1 female named Dana. Assume that two fruit flies are randomly selected with replacement. a. After listing the possible samples and finding the proportion of males in each sample, use a table to describe the sampling distribution of the proportion of males. Proportion of males Probability 0.5 (Type integers or fractions.)45% of all statistics classes require a statistical calculator and 31% require the use of a computer that has statistical software. Of the classes that require a statistical calculator, 16% also require the use of a computer. If a statistics course is selected at random find: (round to 4 decimal places where possible) a. P(Statistical Calculator) = b. P(Statistical Software) = c. P(Require a Statistical Calculator and Statistical Software) d. P(Require a Statistical Calculator GIVEN Require Statistical Software) =
- Which of the following describes a sampling distribution? a) distribution of individual responses in a single sample b) distribution of individual responses in a population c) probability distribution of individual responses in a single sample b) probability distribution of a sample statistic56% of all statistics classes require a statistical calculator and 28% require the use of a computer that statistical software. Of the classes that require a statistical calculator, 14% also require the use of a computer. If a statistics course is selected at random find: (round to 4 decimal places where possible) a. P(Statistical Calculator) = %3D b. P(Statistical Software) = %3D c. P(Require a Statistical Calculator and Statistical Software) = d. P(Require a Statistical Calculator GIVEN Require Statistical Software) = %3D. What is the expected value and what does it measure? How is it computed for a discrete probability distribution?
- Is it possible for a probability sample to be biased and to also lack independence? Please explain.57% of all statistics classes require a statistical calculator and 29% require the use of a computer that has statistical software. Of the classes that require a statistical calculator, 13% also require the use of a computer. If a statistics course is selected at random find: (round to 4 decimal places where possible) a. P(Statistical Calculator) = b. P(Statistical Software) = c. P(Require a Statistical Calculator and Statistical Software) = d. P(Require a Statistical Calculator GIVEN Require Statistical Software) =For each situation given below, do the following: A) Decide if the random variable is Poisson (or reasonably close to Poisson). Explain your reasoning. B) If it is Poisson, find the mean and variance. C) If it is Poisson, find the probabilities indicated in the problem. 1. During the lunch rush, cars arrive at the McDonald's drive-thru line at a rate of 58 cars per hour. The arrivals are random. a. The probability of 0 cars arriving in the next half hour. b. The probability of more than 60 cars arriving in the next half hour. 2. You work for a home security sales team going door-to-door. You average 4.3 sales per day. a. The probability of no sales in a given day. b. The probability of more than 25 sales during a workweek (5 days). c. The probability of at least 250 sales over a 12 workweek summer. 3. Br. Cox plants a fixed number of bean seeds in each of his garden boxes. He is interested in the number that germinate in a given box. On average, 23 seeds germinate in each box. a. The…
- A genetics experiment involves a population of fruit flies consisting of 2 males named Bart and Christopher and 2 females named Debbie and Elena. Assume that two fruit flies are randomly selected with replacement. ... a. After listing the possible samples and finding the proportion of females in each sample, use a table to describe the sampling distribution of the proportion of females. Proportion of females Probability 0 0.5 1 (Type integers or fractions.) b. Find the mean of the sampling distribution. μ= (Round to two decimal places as needed.) c. Is the mean of the sampling distribution [from part (b)] equal to the population proportion of females? If so, does the mean of the sampling distribution of proportions always equal the population proportion? OA. No, the sample mean is equal to the population proportion of females. These values are not always equal, because proportion is a biased estimator. OB. Yes, the sample mean is equal to the population proportion of females. These…Why can we consider the sample mean in random samples of size n from a given population to be a random variable?I’m taking a probability and a statistics class. Please get this correct so I can study.
