sed on a sample of size 49, a 95% confidence interval for the mean scaore of all students, u, on an aptitude is from 59.2 to 64.8. Find the margin of erro

Q: standardized placement test was given to 10 boys and 11 girls who applied for a certain job. The…

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Q: How large a sample should be selected to provide a 90% confidence interval with a margin of error of…

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Q: A random sample of 21 Camden County College students had a mean age of 24 years, with a standard…

A:

Q: The 95% confidence interval for the population slope was calculated as (0.751,0.947). Based on the…

A: We have given  The confidence interval for slope is given to be (0.751, 0.947)

Q: Find the critical t value to use in making a 99% confidence interval for a mean if the sample size…

A: Solution-: Given: n=7,α=0.01 We find the critical t- value to use in making a 99% C.I. for a mean

Q: A random sample of 100 NBA women players had a mean height of  x¯=69.5in  and a standard deviation…

A: The sample size is 100, sample mean is 69.5, and sample standard deviation is 3.3.

Q: The GPA of accounting students in a university is known to be normally distributed. A random sample…

A: Introduction:The 100 (1 – α) % confidence interval for the population mean, μ, for given sample…

Q: Find the critical t value to use in making a 98% confidence interval for a mean if the sample size…

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Q: Find the critical t value to use in making a 90% confidence interval for a mean if the sample size…

A: Given, confidence level = 90.0 Need to find Critical value t

Q: The total of individual weights of garbage discarded by 17 households in one week is normally…

A:

Q: A marine biologist is interested in whether the chinook salmon a particular species of salmon in the…

A: The value of sample mean is, x¯=36 The value of margin of error is, ME= 9

Q: A data set includes 109 body temperatures of healthy adult humans having a mean of 98.2°F and a…

A: The random variable X follows normal distribution. The sample size is 109. The sample mean is 98.2.…

Q: A recent study of 28 city residents showed that the mean of the number of years they lived at their…

A: The formula of confidence interval for the population mean is given by                  confidence…

Q: mong 1815 randomly selected high school students surveyed by the Centers for Diseases Control, 300…

A: Given : Total number of high school students = 1815 Number of students said they were current…

Q: Find the margin of error for a​ 95% confidence interval for estimating the population mean when the…

A: Sample S.D = s = 110

Q: A random sample of 5 months in an urban area showed an average of 28 mail carriers were bitten by…

A: Here we need to construct a 95% confidence interval for the mean number of mail carriers who were…

Q: Data of the weights of 81 pet dogs was collected. The sample mean was 30. The standard deviation is…

A: Here, T - interval is applicable ================= df = n-1

Q: The sample correlation is -0.8. If the sample size was 40, then the 99% confidence interval states…

A:

Q: A random sample of 56 fluorescent light bulbs has a mean life of 645 hours and assume that the…

A: Given,sample size(n)=56sample mean(x¯)=645population standard…

Q: An SRS of 27 students at NYU gave an average height of 5.4 feet and a standard deviation of .1 feet.…

A: Given that, An SRS of 27 students at NYU gave an average height of 5.4 feet and a standard deviation…

Q: The percentage of titanium in an alloy used in aerospace castings is measured in 51 randomly…

A: 1. Given: n=51s=0.37 The degrees of freedom is obtained as below: df=n-1=51-1=50 From the Chi Square…

Q: ample mean of 62.2 was found and a 95% confidence interval of (57.3, 67.1) was also found. What is…

A: The sample mean for the  population is 62.2  . Confidence interval is (57.3 , 67.1)

Q: A group of 40 bowlers showed that their average score was 192 with a standard deviation of 8. Find…

A: Given: n = 40 x¯ = 192 σ = 8 confidence level = 95%

Q: a random of 15 lunch orders at noodles & company showed a mean bill of $14.48 with a standard…

A: I will use excel to solve this question.…

Q: A survey taken several years ago found that the average time a person reading a newspaper was…

A: Given:

Q: A random sample of 250 students at a university finds that these students take a mean of 15.3 credit…

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Q: A sample of 200 smokers were asked at what age they started smoking. The meanage was 18.3 years. The…

A: Solution:From the given information, population standard deviation value is 4.35 years and sample…

Q: A study of 96 bolts of carpet showed that their average length was 77.5 yards. The standard…

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Q: A recent study of 25 motorists showed that they spent an average of 750 pesos per week. The standard…

A: We have to find  99% confidence interval of the true mean.

Q: Fifty-five students were randomly selected from Airbender College, and their average score on a…

A: Given, x=68.22s=18.8n=55α=0.01zα2=z0.005=2.576

Q: A city planner wants to estimate the average monthly residential water usage in the city. He…

A: The confidence interval is an alternative to hypothesis testing.

Q: A researcher collected data on a sample of 40 stores of a large retail chain, and for each store…

A: