Find the margin of error if the sample proportion is 0.37 and the sample size is 300. on Consider the level of confidence as 90%.

Q: For any distribution what is the score that separates the highest 10% from the rest called?

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Q: If you want to be 99​% confident of estimating the population mean to within a sampling error of ±25…

A: The provided information’s are:Standard deviation (σ) = 125.Sampling error (E) = ±25Confidence level…

Q: What is the corresponding Z- score, mean is 110, standard deviation is 8 and x is 90

A: In question, We'll find the Z - score for mean 110, standard deviation 8 and x = 90. The solution is…

Q: I want to estimate the proportion of college professors who believe in aliens. How many college…

A: Given Confidence interval=90% sample proportion is within 5 percentage

Q: The mean of a population (μ) is 120 and the standard deviation is 20.  What is the mean of the…

A: From the provided information, Mean (µ) = 120 Standard deviation (σ) = 20

Q: For a binomial distribution, the mean is 6 and the standard deviation is 2. Write out all the terms…

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Q: The population Mean is 125 with a st dev of 22.However , the population distribtuon is skewed to the…

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Q: On a nationwide math test, the mean was 63 and the standard deviation was 10. If Roberto scored 85,…

A: GivenMean(μ)=63standard deviation(σ)=10score(x)=85

Q: If you want to be99​% confident of estimating the population proportion to within a sampling error…

A: Proportion is almost similar to the concept of probability. Proportion is a fraction of the…

Q: A random sample of 2,000 driver's license applications found that 17% reported their eye color as…

A: Solution: Given information: n= 2000 Sample size  p^= 0.17 Sample proportion Assumed Confidence…

Q: On a nationwide math test, the mean was 69 and the standard deviation was 7. If Roberto scored 80,…

A: Given,mean (μ)=69standard deviation (σ)=7andRoberto score(X)=80

Q: Find the proportion of Normally distributed observations with a z-score below 2.56. Give your answer…

A: Given Z=2.56

Q: The owner of a local bar specializing in alternative music wanted to determine the average age of…

A: t 95% confidence level, the z value is 1.96 which can be obtained by using the standard normal…

Q: If you want to be 95​% confident of estimating the population mean to within a sampling error of ±15…

A:

Q: Find the proportion of scores greater than 70 mean is 90 standard deviation is 10

A: The standard normal distribution:A continuous random variable Z is said to follow standard normal…

Q: If you want to be 99% confident of estimating the population mean to within a sampling error of ±20…

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Q: accounting examination is 26, how large a sample is needed to estimate the true mean score within 6…

A: HERE GIVEN , n = ??? population standard deviation  =  26  confidence level  = 99%

Q: If you want to be 95% confident of estimating the population mean to within a sampling error of +/-…

A:

Q: If you want to be 95​% confident of estimating the population proportion to within a sampling error…

A: z-critical value at alpha(0.95) = 1.96 margin of error =0.08   p = 0.5

Q: The mean of a distribution is 291, while the median is 217. Which of these statements is likely to…

A:

Q: What happens to the interval as you increase the confidence of the sampling distribution?

A: As the confidence level increases the width of the confidence interval increases and as the…

Q: If you want to be 95% confident of estimating the population proportion to within a sampling error…

A:

Q: If you want to be 95% confident of estimating the population mean to within a sampling error of +6…

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Q: What is the percentile rank of the score 65?   In an English test , the mean is 60 and the…

A: Given X=65μ=60σ=6

Q: If you want to be 99% sure confident of estimating the population mean to within a sampling error of…

A: The critical value from the standard normal table at 99% confidence level is,

Q: In each of Exercises, explain the effect on the margin of error and hence the effect on the accuracy…

A: Formula for the margin of error is given by

Q: he History test had a national mean of µ = 52 and a standard deviation of  σ= 9. How much sampling…

A: Given data, µ = 52  σ= 9 n=27 sampling error=?

Q: The percent fo Coloradans that own a Subaru is 56%. If you were to take a random sample of size 70,…

A: We have given that,  Let X be the random variable from binomial distribution with probability (p) =…

Q: For a random sample of 10 men, the mean head circumference is x-bar= 57.3 cm and the sample standard…

A:

Q: Find the proportion of Normally distributed observations with a zz-score above -2.84. Give your…

A: Given the proportion of Normally distributed observations with a z-score above -2.84

Q: It has been claimed that over 30 percent of entering college students have blood cholesterol levels…

A: The appropriate test for the given claim is one sample t test over the hypothesis, H0 : μ≥200 Ha ;…

Q: At Thomas Nelson Community College, the Pre-Test for Mathematics has 200 points on the test. The…

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Q: Determine whether the statement is true or false.   To estimate the value of​ p, the population…

A: Determine whether the statement is true or false.   To estimate the value of​ p, the population…

Q: The sampling plan: n = 350 and c = 1, meets a confidence-reliability of (95%, 99%) A. True or False.…

A:

Q: By how many times does the sample size have to be increased to decrease the margin of error by a…

A: Margin of Error- In the theory of probability and statistics, there is a inverse relation between…

Q: If you want to be 95​% confident of estimating the population mean to within a sampling error of ±20…

A: Given information- Population standard deviation, σ = 100 Confidence interval = 0.95 Significance…

Q: If you want to be 95% confident of estimating the population proportion to within a sampling error…

A: Obtain the sample size of a preliminary estimate for p with 0.40. The formula of sample size is,…

Q: A marketing manager samples 150 people and finds that 87 of them have made a purchase on the…

A: a) From the provided information, Sample size (n) = 150 Number of people who have made a purchase on…

Q: On the past mathematics test, the bottom 20% of students failed to pass the test. The mean for the…

A: The mean of the data is μ=55 and the standard deviation is σ=11 It is also given that 20% of…

Q: d. University administrators would like to conduct a new survey in May to update this estimate. They…

A: Given: Margin of error (E) = 2.25% = 0.0225 Confidence level = 98% The estimate from the previous…

Q: Calculate the probable outlier data points.

A: Lower quartile = 13 Upper quartile = 24.5

Q: How many Biology students’ records need to be sampled to estimate the percentage who earn "A"s to…

A: The proportion is not provided therefore in worst case it can be assume as (p) 0.5. Margin of error…

Q: Define If the actual Y score was 31, but the predicted score was 28, then the error of prediction is…

A: The formula for the calculation of the prediction error is given below:

Q: The average on the Math section of the SAT was 500 with a standard deviation of 100. What score must…

A:

Q: The mean of the distribution of sample means would be equal to:

A: The mean of the distribution of sample means would be equal to ?

Q: A researcher in Des Moines, Iowa sampled 56 households and found the mean number of puppies per…

A: # sample size n=56  population mean mu=3.03  standard deviations=1.5  then to find 62nd percentile…

Q: If you want to be 95% confident of estimating the population mean to within a sampling error of ±3…

A: Given that, Critical values: Using the z-table, the critical value at 95% confidence level for a…

Q: The mean of 7 consecutive integers is 10. What is the standard deviation?

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Q: A polling company conducts an annual poll of adults about political opinions. The survey asked a…

A: It is given that, p is 0.42, and sample size (n) is 434.  The level of confidence is 0.95.

Q: By how many times does the sample size have to be increased to decrease the margin of error by a…

A: Need to find By how many times does the Sample size have to be increased to decrease the margin of…