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3 years ago

5

A scuba instructor wants to know the opinions of scuba divers about online scuba diving tests. She obtains a list of 900 scuba d

ivers who have recently completed an online scuba diving course and e-mails a questionnaire to a randomly selected group of 175 of these divers. Only 54 of the questionnaires are returned. Identify the population and the sample in this study. The population is 175 and the sample is 54. The population is 900 and the sample is 175. The population is 900 and the sample is 54. The population is 54 and the sample is 900. The population is 175 and the sample is 900.

1 answer:

svet-max [94.6K]3 years ago

8 0

Answer:

the population is 900 and the sample size is 54

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Jillian invested $2000 in an account with a 1.25% annual

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Answer:

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Step-by-step explanation:

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3 years ago

A shade of green paint is made by mixing blue paint and yellow paint in the ratio of 4 to 3. How many pints of blue paint and ye

nexus9112 [7]

Answer:

$Blue = 12$

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Step-by-step explanation:

Given

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Required

Determine the number of pints of each to make 21 of green paints

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Number of blue paint calculated last week is:

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3 years ago

An article regarding interracial dating and marriage recently appeared in the Washington Post. Of the 1,709 randomly selected ad

VMariaS [17]

Answer:

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Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

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For this problem, we have that:

323 blacks, 86% of blacks said that they would welcome a white person into their families. This means that $n = 323, p = 0.86$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

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Answer:

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Step-by-step explanation:

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