10% of the students in your college are left-handed. We take a random sample of 169 students. (a) What is the mean and standard deviation of sampling distribution of sample proportion? (b) What is the probability that in our sample there are more than 12% of left-handed students? (c) In a classroom with 10 students, find the probability that there is no left-handed student. (d) What is the expected value of left-handed students in a classroom with 20 students?

Q: Suppose that a recent poll found that 65​%of adults believe that the overall state of moral values…

A:

Q: Suppose that a recent poll found that 43​% of adults believe that the overall state of moral values…

A:

Q: According to an almanac, 80% of adult smokers started smoking before turning 18 years old. (a)…

A: Binomial distribution: The binomial distribution gives the probability of number of successes out of…

Q: Business Weekly conducted a survey of recent graduates from the top MBA programs. On the basis of…

A: Solution: Given information: p= 0.80 population proportion of the recent graduates annual salary…

Q: According to an​ almanac,60​%of adult smokers started smoking before turning 18 years old.   ​(a)…

A: Given that  According to almanac  60​%of adult smokers started smoking before turning 18 years old.…

Q: Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long…

A: Given: mean μ=66 standard deviation σ=1.3

Q: Find the probability that less than 90% of the 84 recent graduates have an annual salary exceeding…

A: (1) Obtain the probability that less than 80% of the 84 recent graduates have an annual salary…

Q: (a) What is the probability that one car chosen at random will have less than 71.5 tons of coal?…

A: Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long…

Q: Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long…

A:

Q: Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long…

A:

Q: Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long…

A: Given that: Population mean, μ=65 Population standard deviation, σ=1.5

Q: Suppose a researcher is interested in the number of good versus bad dreams that students have during…

A: Given:  Proportion of students having a bad dream during the week p=0.48

Q: oal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long…

A: The mean is 81 tons and the standard deviation is 1.4 tons.

Q: Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long…

A: Solution

Q: survey, assume that 75% of the recent graduates annual salary exceeds $80000. Suppose you take a…

A:

Q: Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long…

A:

Q: According to an almanac, 606 of adult smokers started smokng before turning 18 years old. (a)…

A:

Q: Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long…

A: Mean(µ) = 81Standard deviations (σ) = 1.6X ~ N (µ, σ )= N(81, 1.6)

Q: Suppose that 4% of the 2 million high school students who take the SAT each year receive special…

A: We have given that n = 15 p = 4% = 0.04 Here we will use binomial distribution because probability…

Q: Suppose that a recent poll found that 59% of adults believe that the overall state of moral values…

A:

Q: Business Weekly conducted a survey of recent graduates from the top MBA programs. On the basis of…

A: See the hand written solution

Q: Suppose that a recent poll found that 54% of adults believe that the overall state of moral values…

A:

Q: You have two large bins of several thousand plastic beads. Bin A is 60% red beads, Bin B is 54% red…

A: Solution: Let PA and PB be the proportion of red beads of Bin A and Bin B respectively. Proportion…

Q: An automobile insurer has found that repair claims are Normally distributed with a mean of $620 and…

A: We want to find the probability by using standard normal distribution table.

Q: The diameter of a brand of tennis balls is approximately normally distributed, with a mean of 2.63…

A: We use standard normal distribution to compute probabilities associated with the normal random…

Q: Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long…

A: We know that if; X~Normal(μ,σ2) Then; Z=X-μσ~Normal(0,1) X1,X2,...,Xn~Normal(μ,σ2), independently…

Q: Since the sampling distribution of X possesses a different standard deviation value from X, it…

A:

Q: Suppose that a recent poll found that 41​% of adults believe that the overall state of moral values…

A: Solution: Let X be the random variable that the number of adults who believe that the overall state…

Q: Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long…

A: Let X be the random variable from normal distribution with mean (μ) = 50, standard deviation (σ) =…

Q: Research shows that 51% of US citizens are female.  Suppose we are constructing a sampling…

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

Q: Suppose that recent poll found that 51% of adults believe that the overall state of moral values is…

A: Let there are n trials and each has two outcomes Success and Failure. The trials are independent and…

Q: A farmer has 2000 sacks of beans in his store, 600 of which are found to be infested with pests. (a)…

A: To solve this problem, we can use the binomial distribution approximation since the sample size is…

Q: uppose that a recent poll found that 53​%of adults believe that the overall state of moral values is…

A: Given data, p=53%=0.53 n=400 Compute Mean and Standard deviation.

Q: (1) A survey found that 35% of pet owners had their pets bathed professionally rather than do it…

A: Given that  n=10 , p=35%=0.35 , q=1-p=1-0.35=0.65 R~Binomial(n=10,p=0.35)

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: Suppose that a recent poll found that 46​% of adults believe that the overall state of moral values…

A: Give that, Probability, p= 46%  = 0.46  And we've to find for 200  So , sample size, n= 200

Q: The U.S. Census Bureau announced that the mean sale price of new houses sold in 2011 was $267,900.…

A: Given that mean=μ=267900standard deviation =σ=90000

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.