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The opera theater manager calculates that 16% of the opera
The opera theater manager calculates that 16% of the opera tickets for tonight's show have been sold.If the manager is right, what is the probability that the proportion of tickets sold in a sample of… read more
R.R. Jha
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Suppose the lengths of the pregnancies of a certain animal
Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean mu equals 178 days and standard deviation sigma equals 17 days. Complete parts​ (a) through​… read more
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The population mean annual salary for environmental
The population mean annual salary for environmental compliance specialists is about $63,500. A random sample of 40 specialists is drawn from this population. What is the probability that the mean sala… read more
R.R. Jha
R.R. Jha
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I have a prob I need help with. Do you want to own your own
Do you want to own your own candy store? Wow! With some interest in running your own business and a decent credit rating, you can probably get a bank loan on startup costs for franchises such as Candy Express, The Fudge Company, Karmel Corn, and Rocky Mountain Chocolate Factory. Startup costs (in thousands of dollars) for a random sample of candy stores are given below. Assume that the population of x values has an approximately normal distribution. 90 177 128 96 75 94 116 100 85 (a) Use a calculator with mean and sample standard deviation keys to find the sample mean startup cost x and sample standard deviation s. (Round your answers to one decimal place.) x = thousand dollars s = thousand dollars(b) Find a 90% confidence interval for the population average startup costs μ for candy store franchises. (Round your answers to one decimal place.) lower limit thousand dollars upper limit thousand dollars … read more
Ryan
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I have stats I and have 12 to 13 questions to answer. The questions
I have stats I and have 12 to 13 questions to answer. The questions will have to be completed one at a time. would you be interested?… read more
Stevewh
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(b) What is the standard error of the mean (Round your answer
(b) What is the standard error of the mean? (Round your answer to 2 decimal places.) Standard error of the mean seconds. (c) What percent of the sample means will be greater than 154 seconds? (Round y… read more
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8. The life span of a battery is normally distributed, with
8. The life span of a battery is normally distributed, with a mean of 2300 hours and a standard deviation of 50 hours. What percent of batteries have a life span that is more than 2365 hours? What per… read more
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Question 1 Past records suggest that the mean annual income,
Question 1 Past records suggest that the mean annual income, u1, of teachers in state of New York is less than or equal to the mean annual income, u2, of teachers in Rhode Island. In a current study, … read more
Chirag
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Let x be a random variable that represents the weights in kilograms
Let x be a random variable that represents the weights in kilograms (kg) of healthy adult female deer (does) in December in a national park. Then x has a distribution that is approximately normal with… read more
suprabhatai
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Suppose tht 47% of doctors in America are dentists. If a random
Suppose tht 47% of doctors in America are dentists. If a random sample of size 598 is selected, what is the probability that the proportion of the sampled doctors who are dentist will be less than 52%… read more
Osbert12
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Master's Degree
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A hotel manager assumes that 29% of the hotel rooms are booked.
A hotel manager assumes that 29% of the hotel rooms are booked. If the manager is accurate, what is the probability that the proportion of rooms booked in a sample of 657 rooms would differ from the p… read more
dhouse1940
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Consider the following A film distribution manager calculates
Consider the following: A film distribution manager calculates that 6% of the films released are flops. If the manager is right, what is the probability that the proportion of flops in a sample of 437… read more
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1. The diameter of ball bearings produced in a manufacturing
1. The diameter of ball bearings produced in a manufacturing process can be explained using a uniform distribution over the interval 6.8 to 8.5 millimeters. The probability that a randomly selected ba… read more
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Ok, I will accept... i thought that would disconnect us though
Ok, I will accept... i thought that would disconnect us though (I am new to this site!) Binomial problem: A machine that manufactures automobile parts is estimated to produce defective parts 9% of the… read more
Stevewh
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Hi, Please any help will be appreciated. Use the normal
Hi, Please any help will be appreciated. Use the normal distribution od SAT critical reading scores for which the mean is 508 and the standard deviation is 120. Assume the variable x is normally distr… read more
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1.a vending machine dispenses coffee into a twenty ounce cup.
1.a vending machine dispenses coffee into a twenty ounce cup. The amount of coffee dispensed into the cup is normally distributed with a standard deviation of 0.06 ounce. You can allow the cup to over… read more
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Stevewh
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QUESTION 6 True or False The probability that a standard
QUESTION 6 True or False: The probability that a standard normal random variable, Z, is between 1.50 and 2.10 is the same as the probability Z is between –2.10 and –1.50. True False QUESTION 7 For sam… read more
Greg
Greg
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FOR SCOTT Suppose that pulse rates among healthy adults are
FOR SCOTT: Suppose that pulse rates among healthy adults are normally distributed with a mean of 81 beats/second and a standard deviation of 8 beats/second. What proportion of healthy adults have puls… read more
Scott
Scott
MIT Graduate
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