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Tatiana Cassar

Tatiana C.

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Lynn Larson verified

Numerade educator

Suppose a random sample of n=260 teenagers 13 to 17 years of age was asked if they use social media. Of those surveyed, 201 stated that they do use social media. Find the sample proportion of teenagers 13 to 17 years of age who use social media. The sample proportion is p̂ =

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Taha T verified

Numerade educator

Fill in the blanks to complete the following statements. (a) For the shape of the distribution of the sample proportion to be approximately​ normal, it is required that ​np(1minus​p)greater than or equals​______. (b) Suppose the proportion of a population that has a certain characteristic is 0.8. The mean of the sampling distribution of p-hat from this population is mu Subscript p-hat equals​______. (a) For the shape of the distribution of the sample proportion to be approximately​ normal, it is required that ​np(1minus​p)greater than or equals

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Taha T verified

Numerade educator

According to a survey in a country, 38% of adults do not own a credit card. Suppose a simple random sample of 200 adults is obtained. Would it be unusual for a random sample of 200 adults to result in 66 or fewer who do not own a credit card? Why? Select the correct choice below and fill in the answer box to complete your choice. (Round to four decimal places as needed.) A. The result is unusual because the probability that ModifyingAbove p with caret is less than or equal to the sample proportion is enter your response here, which is greater than 5%. B. The result is not unusual because the probability that ModifyingAbove p with caret is less than or equal to the sample proportion is enter your response here, which is greater than 5%. C. The result is unusual because the probability that ModifyingAbove p with caret is less than or equal to the sample proportion is enter your response here, which is less than 5%. D. The result is not unusual because the probability that ModifyingAbove p with caret is less than or equal to the sample proportion is enter your response here, which is less than 5%.

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Hoan Nguyen verified

Numerade educator

According to a survey in a​ country, 38​% of adults do not own a credit card. Suppose a simple random sample of 200 adults is obtained. ​If 100 different random samples of 200 adults were​ obtained, one would expect ​(c) What is the probability that in a random sample of 200 ​adults, between 33​% and 39​% do not own a credit​ card? The probability is to result in more than 39​% not owning a credit card.

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Breanna Ollech verified

Numerade educator

According to a survey in a​ country, 38​% of adults do not own a credit card. Suppose a simple random sample of 200 adults is obtained. ​If 100 different random samples of 200 adults were​ obtained, one would expect    enter your response here to result in more than 39​% not owning a credit card.

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According to a survey in a​ country, 38​% of adults do not own a credit card. Suppose a simple random sample of 200 adults is obtained. ​(b) What is the probability that in a random sample of 200 ​adults, more than 39​% do not own a credit​ card? The probability is

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Tim Thornhill verified

Numerade educator

According to a survey in a​ country, 38​% of adults do not own a credit card. Suppose a simple random sample of 200 adults is obtained. Determine the standard deviation of the sampling distribution of ModifyingAbove p with caret. sigma Subscript ModifyingAbove p with caretequals

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Hoan Nguyen verified

Numerade educator

According to a survey in a​ country, 38​% of adults do not own a credit card. Suppose a simple random sample of 200 adults is obtained. Complete parts​ (a) through​ (d) below.Determine the mean of the sampling distribution of ModifyingAbove p with caret. mu Subscript ModifyingAbove p with caret Baseline equals    enter your response here

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Breanna Ollech verified

Numerade educator

According to a survey in a​ country, 38​% of adults do not own a credit card. Suppose a simple random sample of 200 adults is obtained. Complete parts​ (a) through​ (d) below. ​(a) Describe the sampling distribution of ModifyingAbove p with caret​, the sample proportion of adults who do not own a credit card. Choose the phrase that best describes the shape of the sampling distribution of ModifyingAbove p with caret below. A. Not normal because n less than or equals 0.05 Upper N and np left parenthesis 1 minus p right parenthesis less than 10 B. Not normal because n less than or equals 0.05 Upper N and np left parenthesis 1 minus p right parenthesis greater than or equals 10 C. Approximately normal because n less than or equals 0.05 Upper N and np left parenthesis 1 minus p right parenthesis greater than or equals 10 D. Approximately normal because n less than or equals 0.05 Upper N and np left parenthesis 1 minus p right parenthesis less than 10

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Breanna Ollech verified

Numerade educator

According to a study conducted by a statistical organization, the proportion of people who are satisfied with the way things are going in their lives is 0.80. Suppose that a random sample of 100 people is obtained. Complete parts (a) through (e) below. (d) In the sample obtained in part (a), what is the probability that the proportion who are satisfied with the way things are going in their life exceeds 0.82? The probability that the proportion who are satisfied with the way things are going in their life exceeds 0.82 is

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