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Ananda Taylor

Ananda T.

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Construct the appropriate confidence interval. A simple random sample of size $n=40$ is drawn from a population. The sample mean is found to be $\bar{x}=120.5$ and the sample standard deviation is found to be $s=12.9 .$ Construct a $99 \%$ confidence interval about the population mean.

Construct the appropriate confidence interval. A simple random sample of size $n=40$ is drawn from a population. The sample mean is found to be $\bar{x}=120.5$ and the sample standard deviation is found to be $s=12.9 .$ Construct a $99 \%$ confidence interval about the population mean.

Fundamentals of Statistics

Estimating the Value of a Parameter…

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Nicholas Salas verified

Numerade educator

Consider a collection of envelopes consisting of 3 red envelopes​, 3 blue envelopes​, 3 green envelopes​, and 1 yellow envelope. If three envelopes are selected at​ random, without​ replacement, determine the probability that they are all green envelopes. (Fraction form please)

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Supreeta N verified

Numerade educator

The given frequency distribution describes the speeds of drivers ticketed in a 30​ mi/h speed zone. Find the standard deviation of sample data summarized in a frequency distribution table. Speed 40−43 44−47 48−51 52−55 56−59 Frequency 27 11 9 5 3

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Donna Densmore verified

Numerade educator

In a​ region, there is a 0.9 probability chance that a randomly selected person of the population has brown eyes. Assume 14 people are randomly selected. a. Find the probability that all of the selected people have brown eyes. The probability that all of the 14 selected people have brown eyes is (Round to three decimal places as​ needed.) b. Find the probability that exactly 13 of the selected people have brown eyes. The probability that exactly 13 of the selected people have brown eyes is (Round to three decimal places as​ needed.) c. Find the probability that the number of selected people that have brown eyes is 12 or more. The probability that the number of selected people that have brown eyes is 12 or more is (Round to three decimal places as​ needed.) d. If 14 people are randomly​ selected, is 12 an unlikely number for those with brown​ eyes? A. Yes​, because the probability that 12 or more of the selected people have brown eyes is greater than 0.05. B. No​, because the probability that 12 or more of the selected people have brown eyes is less than 0.05. C. Yes​, because the probability that 12 or more of the selected people have brown eyes is less than 0.05.

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T. L. verified

Numerade educator

Assume that a procedure yields a binomial distribution with n=4 trials and a probability of success of p=0.10. Use a binomial probability table to find the probability that the number of successes x is exactly 3.

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T. L. verified

Numerade educator

Assume that boys and girls are equally likely. Find the probability that when a couple has three​ children, there are exactly 2 boys. What is the probability of exactly 2 boys out of three​ children?

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T. L. verified

Numerade educator

Consider a collection of envelopes consisting of 3 red envelopes​, 3 blue envelopes​, 2 green envelopes​, and 1 yellow envelope. If two envelopes are selected at​ random, with​ replacement, determine the probability that both are green envelopes.

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Supreeta N verified

Numerade educator

Assume that a sample is used to estimate a population mean μ. Use the given confidence level and sample data to find the margin of error. Assume that the sample is a simple random sample and the population has a normal distribution. Round your answer to one more decimal place than the sample standard deviation. ​95% confidence; n=12​; x=71​; s=5.3

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T. L. verified

Numerade educator

In a survey conducted by a wedding planning​ website, 1229 married or engaged women were asked about the importance of a bended knee when making a marriage proposal. Among the 1229 ​respondents, 64​% said that the bended knee was essential. Complete parts​ (a) through​ (d)

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Keondre Parker verified

Numerade educator

A poll of 1068 teens aged 13 to 17 showed that 57​% of them have made new friends online. Use a 0.05 significance level to test the claim that half of all teens have made new friends online. Use the​ P-value method. Use the normal distribution as an approximation to the binomial distribution.

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list \( 1 \leftarrow \quad \begin{array}{l}\text { Consider a sample of } 53 \text { football games, where } 28 \text { of them were won by the home te te the claim that the probability that the home team wins is greater than one-half. } \\ \text { to test }\end{array} \) \( \operatorname{tion} 3 \) C. \( \mathrm{H}_{0}: p>0.5 \) \( H_{1}: p=0.5 \) D. \( \mathrm{H}_{0}: \mathrm{P}=0.5 \) \( H_{1}: p \neq 0.5 \) Identify the test statistic for this hypothesis test. The test statistic for this hypothesis test is \( 0.41 \). (Round to two decimal places as needed.) Identify the P-value for this hypothesis test. The \( \mathrm{P} \)-value for this hypothesis test is (Round to three decimal places as needed.) xtbook Ask my instructor Clear all

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