Use the appropriate statistical tables.  A recent survey showed that from a sample of 500 packages delivered by a Postal Service, 480 were delivered on time.  The manager of the Postal Services claims that 98 percent of their mail are delivered on time. Test at the 1% significance level to determine whether the true proportion is less than 98 percent.

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A: The sample proportion (p̂) is calculated by dividing the number of people who have seen a movie in…

Q: Q12. If 150 households were surveyed out of which 120 households have internet fiber cable, then…

A: Given Data: x=150-120=30 n=150

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A: According to the given information, we construct the below table,BooksPrice (Xi) Weights…

Q: A report statesb that 45% of home owners had a vegetable garden, how large a sample is needed to…

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Q: Check My Work eBook Thirty-six percent of all Americans drink bottled water more than once a week…

A: Given. p=0.36 a) n = 540

Q: Consider the data set 7, 9, 14, 15, 22. What is the standard error of the sample mean?

A:

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A:

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A: Data given  425,428,463,248

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A: Given information: The results of online survey are given.

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A: Given:

Q: In a recent survey of 100 new vegetarians, 74 said that their new

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Q: A random sample of 2000 driver's license applications found that 17% reported their eye color as…

A:

Q: In a city with three high schools, all the ninth graders took a Standardized Test, with these…

A: Introduction: Suppose there are k groups, such that the jth group [j = 1, 2, …, k] has nj…

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A: It is given that, among 158 tankers 135 did not have spills.

Q: The percentage of girls who like pink in a school is 57%. Which proportion separates the lowest 10%…

A: The percentage of girls who like pink in a school is 57%.p = proportion = 57/100 = 0.57 The sampling…

Q: A consumer group surveyed 146 airplane travelers after a flight and found that 132 of them would fly…

A:

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A:

Q: The absolute difference between the population mean and the sample mean is called the

A:

Q: Professor X had the 22 students in his 10 A.M. Introduction to Marketing rate his performance as…

A: Given: The data given is shown below Excellent Good Fair Poor 94 75 70 68 90 68 73 70 85…

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Q: Please answer the questions in the photo and explain. Thank you

A: (a) Sample Mean = (2.2 +0.5 +2.4 +2.7 +2 +1.5 +0.2 +1.5 +0.1 +0.2)/10 = 1.33 (b) Here, we're…

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Q: A newspaper infographic titled "Baby's First Photo Reveal" summarized data from a survey of 1,000…

A: Answer is given by confidence interval.

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Q: According to one source, 51% of plane crashes are due at least in part to pilot error. Suppose that…

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Q: In a survey of 400 items in a production line, it was discovered that 10% are defective. What is the…

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A: (since it is nit mention which question so as per our protocol we shall answer only the first three…

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A: From the provided information,

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Q: The World Health Organization analyzed generic drugs in 45 countries. It collected 3,575 samples.…

A: Given data: The World Health Organization analyzed generic drugs in 45 countries. It collected 3,575…

Q: Past studies have indicated that the percentage of smokers was estimated to be about 34%. Given the…

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Q: Disability causes 48% of all mortgage foreclosures. Given that 20 mortgage foreclosures are audited…

A:

Q: Find the best point estimate of the population proportion p

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Q: We would like to determine the average height of the overall student body at Michigan State…

A: Yes, It is necessary to take a sample from the overall student body.

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A:

Q: Drowning in bathtubs is a major cause of death in children less than 5 years old. A random sample of…

A: We Have to find Estimate the percent of all parents of young children who use baby bathtubs.

Q: In a city with three high schools, all the ninth graders took a Standardized Test, with these…

A: We have given that the mean score of test of all the ninth graders from the three school's of the…