A study randomly selected 676 Canadians and asked them what portion of their incomethey allocate to savings/investments. The average found was 28%. Suppose the populationmean is 24.8% and the standard deviation is 3.2%.Determine the parameter, estimator, and estimate. What is the distribution of theestimator?а.b. What is the probability that the estimate is greater than 26%?c. What is the probability that the estimate is between 20% and 30%?d. What sample size would be needed if the researchers want the standard deviation ofthe estimator to be less than or equal to 0.01%?

Given that - A study randomly selected 676 Canadians and asked them what portion of their income…

Answered: A study randomly selected 676 Canadians…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A population has a mean u= 85 and a standard deviation o = 16. Find the mean and standard deviation of a sampling distribution of sample means with sample size n = 64. (Simplify your answer.)
Suppose that we know that 33.8% of the people born in the United States between 1936 and 1951 have BLUE eyes. Three randomly selected Americans are selected and examined for eye color. If you let success correspond to an American having BLUE eyes, calculate the following. Calculate the standard deviation.
The probabilities that a person is receiving a chat message 0, 1, 2, 3, 4, or 5 per day are the following: 0.08, 0.19, 0.36, 0.25, 0.07, and 0.05. Find the mean, variance, and standard deviation and interpret the results.
QUESTION 8 According to BusinessWeek, 44% of advertisers claim they have been a victim of internet click fraud. If 120 advertisers are survey more of them will claim they have been a victim of internet click fraud, a. None of the answers is correct Ob.0.8310 OC. 0.6293 d. 0.3707 e.0.1690 QUESTION 9 Assume the cost for an automobile repair is normally distributed with a mean of $524 and a standard deviation of $149. If the cost lower 7% of automobile repair charges, what is your cost? Click Save and Submit to save and submit. Click Save All Answers to save all answers. MacBook Air 20 F3 D00 F4 F2 F5 $ & 1 4 Q W R T Y #
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You play a game of chance that you can either win or lose (there are no other possibilities) until you lose. Your probability of losing is p = 0.61. What is the probability that ita. takes 2 games until you lose. b. takes 5 games until you lose. c. Find the mean c. Find the standard deviation.
According to a recent survey, 53% of adults say they never wear a helmet when riding a bike. Suppose we randomly select 180 adults and find 59% of the sample say they never wear a helmet when riding a bike. Which of the following correctly describes the distribution for the proportion of adults in the sample who never wear a helmet when riding a bike? A. pˆ ~ AN(0.59, 0.0367) B. X ~ AN(95.4, 6.6961) C. pˆ ~ AN(0.53, 0.0014) D. pˆ ~ AN(0.53, 0.0372)
The Normal model N(150,10) describes the distribution of scores on the LSAT, a standardized test required by most law schools. Which of the following questions asks for a probability, and which asks for a measurement? Identify the type of problem and then answer the given question. a. A law school applicant scored at the 60th percentile on the LSAT. What was the applicant's LSAT score? b. A law school applicant scored 164 on the LSAT. This applicant scored higher than what percentage of LSAT test takers? a. Identify the type of problem. Statement a asks for a What was the applicant's LSAT score? (Round to the nearest integer as needed.) b. Identify the type of problem. Statement b asks for a This applicant scored higher than what percentage of LSAT test takers? |% (Round to the nearest integer as needed.)
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A scientist found that the lengths of a certain population of snakes can be reasonably described using a normal distribution with a mean of 42 cm and a standard deviation of 2 cm. If the scientist collected a sample of 89 snakes, how many of the snakes would be expected to have a length less than 40 cm? A 14 30 C 60 D 74
Please answer number 3
The Greenville Power Authority states that the mean monthly energy bill for their customers is $228 with a standard deviation of $38. They know that energy bills follow a normal distribution. a. Between what two values do we expect 99.7% of energy bill’s to fall? b. What is the probability of a randomly selected energy bill at least $190?

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