According to the Internal Revenue Service, the length of time for an individual to complete (learn, prepare copy, assemble, and send) IRS Form 1040 is normally distributed with a mean of 8.66 hours (without any attached schedules). Suppose the standard deviation is 0.9 hours. 1. If one taxpayer is randomly selected, what is the probability that they took more than 8.96 hours to complete form 1040? o What distribution will you use to calculate this probability? N o List the z-scores needed to calculate the result. If there is more than one z-score, separate the values with a comma. o There is a chance that a randomly selected taxpayer took longer than 8.96 hours to complete their tax return. 2. If 52 taxpayers are randomly selected, what is the probability that, on average, they took more than 8.96 hours to complete form 1040? o What distribution will you use to calculate this probability? N o List the z-scores needed to calculate the result. If there is more than one z-score, separate the values with a comma. chance that a random sample of 52 taxpayers took o There is a longer than 8.96 hours to complete their tax returns, on average.

According to the Internal Revenue Service, the length of time for an individual to complete (learn, prepare copy, assemble, and send) IRS Form 1040 is normally distributed with a mean of 8.66 hours (without any attached schedules). Suppose the standard deviation is 0.9 hours. 1. If one taxpayer is randomly selected, what is the probability that they took more than 8.96 hours to complete form 1040? o What distribution will you use to calculate this probability? N o List the z-scores needed to calculate the result. If there is more than one z-score, separate the values with a comma. o There is a chance that a randomly selected taxpayer took longer than 8.96 hours to complete their tax return. 2. If 52 taxpayers are randomly selected, what is the probability that, on average, they took more than 8.96 hours to complete form 1040? o What distribution will you use to calculate this probability? N o List the z-scores needed to calculate the result. If there is more than one z-score, separate the values with a comma. chance that a random sample of 52 taxpayers took o There is a longer than 8.96 hours to complete their tax returns, on average.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

4. Suppose the incubation period for land turtle eggs is normally distributed with a mean of sixty- seven days and standard deviation 7.4 days. a. Find the probability that a land turtle egg will take at least eighty days to hatch. b. Find the probability that a land turtle egg will take at most fifty-five days to hatch. c. Find the probability that a land turtle egg will take between fifty and eighty-five days to hatch. d. Find the length of time such that 85% of the land turtle eggs will have hatched by then. e. Suppose a veterinarian becomes concerned about the health of the land turtle if it takes longer than ninety days to hatch. What is the probability of this happening if the turtle is healthy? Is it likely for this to happen? f. Find and interpret the 90th percentile.
Need d,e,f,g
The graph summarizes statistics regarding distracted drivers below the age of 40 who were involved in fatal crashes. Assume that a driver is selected at random from the 2,888 tallied. If the accident was not related to cell phone use, what is the probability that the driver was between the ages of 20 and 29.
The following frequency table summarizes how many animals are surrendered to a local animal shelter daily. Dogs 15 Cats 14 Rabbits 5 Birds 1 Using experimental probability, what is the probability that a cat will be surrendered tomorrow? Express your answer as a fraction in lowest terms or a decimal rounded to the nearest millionth.
The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.3 days and standard deviation of 1.1 days. Use your graphing calculator to answer the following questions. Write your answers in percent form. Round your answers to the nearest tenth of a percent.a) What is the probability of spending less than 8 days in recovery? %b) What is the probability of spending more than 5 days in recovery? %c) What is the probability of spending between 5 days and 8 days in recovery? %
An automatic machine in a manufacturing process is operating properly if the lengths of an important subcomponent are normally distributed with a mean of 119 cm and a standard deviation of 5.7 cm. A. Find the probability that one selected subcomponent is longer than 121 cm. Probability = B. Find the probability that if 4 subcomponents are randomly selected, their mean length exceeds 121 cm. Probability = C. Find the probability that if 4 are randomly selected, all 4 have lengths that exceed 121 cm. Probability =
The NJ Department of Health has reported the average life span of NJ residents is 81 years. If the standard deviation is σ = 4 years, what is the probability of a person living to at least 92 years of age?
Year 1 Discussion Questions 2. The following is the experience of Insurer A for the last three years: a. What is the frequency of losses in year 1? b. Calculate the probability of a loss in year 1. c. Calculate the mean losses per year for the collision claims and losses. d. Calculate the mean losses per exposure. e. Calculate the mean losses per claim.. f. What is the frequency of the losses? g. What is the severity of the losses? Number of Exposures 10,000 10,000 10,000 Number of Collision Claims 375 030 420 Collision Losses (5) 350,000 250,000 400,000
e) Suppose that weekly household expenditures on petrol are normally distributed, with a mean of $120 and a standard deviation of $50. i. A family is randomly selected. Find the probability that this family spends more than $245 per week on petrol? A 2.5 B 0.0062 C 0.9938 D 0.0202 ii. The government wants to promote public transport and will award a prize to the families who spend the lowest amount on petrol. If the government only wants to give a prize to 10% of households, what is the most that a family is allowed to spend on petrol each week to obtain the prize? A $56 B $184 C $3.50 D $217.60 In a sample of 25 families, what is the probability that the average weekly expenditure on petrol will be less than $105? ii. A 0.0668 B 0.9332 C 0.3821 D 0.6179
An automatic machine in a manufacturing process is operating properly if the lengths of an important subcomponent are normally distributed with a mean of 115 cm and a standard deviation of 5.5 cm. A. Find the probability that one selected subcomponent is longer than 117 cm. Probability = B. Find the probability that if 4 subcomponents are randomly selected, their mean length exceeds 117 cm. Probability = C. Find the probability that if 4 are randomly selected, all 4 have lengths that exceed 117 cm. Probability =
The following frequency table summarizes how many animals are surrendered to a local animal shelter daily. Dogs 13 Cats 15 Rabbits 4 Birds 8 Using experimental probability, what is the probability that a cat will be surrendered tomorrow? Express your answer as a fraction in lowest terms or a decimal rounded to the nearest millionth.