Binomial Distribution. Surveys repeatedly show that about 40% of adults in the U.S. indicate that if they only had one child, they would prefer it to be a boy. Suppose we took a random sample of 20 adults. Based on a proportion of .40, what is the expected value (mean) of this distribution? 3.600 1.900 6.000 8.000

Q: In Binomial Distribution, If q=60% and n=12, then the mean is 0.72. (True or False)

A: Solution: From the given information, q=0.60 and n=12.

Q: Explain the the Chi-Squared Distribution?

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Q: 9. Total sales of cranes in a month is modeled as Normal with a mean of 12.6 and a standard…

A: We have to find probability for given data...

Q: In a two-tailed hypothesis test, the test statistic is determined to be z = -2.5. The p-value for…

A: We have to find p value.

Q: The probability that a marriage will end in divorce within 10 years is 0.25. What are the mean and…

A: Solution :  Given that  The probability that a marriage will end in divorce within 10 years is 0.25.…

Q: The time it takes to drive through the middle of campus follows a uniform distribution with a…

A:

Q: The waiting time for a bus has a uniform distribution between 2 and 11 minutes. What is the 75th…

A: The objective of this question is to find the 75th percentile of a uniform distribution. A uniform…

Q: Suppose math scores on the SAT are normally distributed with a mean of 500 and a standard deviation…

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Q: How can we calculate the probability-weighted average of the squared deviations?

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Q: In a symmetric bell-shaped distribution, about what percent of ? values lie between the first and…

A: According to the empirical rule, in a symmetric bell shaped distribution about 68.3% of the values…

Q: On the final exam in a large statistics class the average score was 76 with a standard deviation of…

A:

Q: The distribution of sample variances tends to be a distribution skewed to the right. true or false?

A: When sampling from a normal distribution, by the definition of the Chi-square variate,…

Q: The time spent in days waiting for a heart transplant can be approximated by a normal distribution…

A: Given information- Population mean, μ = 127 days Population standard deviation, σ = 23.5 days Since…

Q: Using the simplified version of the normal distribution, what percentage of the cases falls within 2…

A: It is given, A normal distribution with 2 standard deviation.

Q: based on this graph, would the median be greater than the mean? or the mean gretaer than the median?…

A: Here data is negatively(right) skewedmore data at higher end

Q: A normal distribution has a mean 80 and standard deviation is 10. What is the probability of…

A: Given:    µ = 80     σ = 10

Q: What is the standard deviation for a binomial distribution where the probability of success is .2…

A: Given :P = 0.2n = 22

Q: The normal model applies to the productivity of all workers at a factory, with a mean of 75 units…

A:

Q: What is the probability that a randomly selected book has fewer than 141 pages if the mean is 193…

A: Given that The mean= 193 The standard deviation = 26 To find the probability that a randomly…

Q: What is the difference between a normal and binomial distribution?

A: Statistics uses normal distributions more often than binomial distributions most of the time.…

Q: Can we use the Normal distribution to calculate probabilities for the weekly income of an individual…

A: From the Histogram, Data is right skewed There is no symmetry Low income - more students High income…

Q: The composite scores of individual students on the ACT college entrance examination in 2019 followed…

A: Solution: Let X be the composite scores of individual students on the ACT college entrance…