You want to be 95% confident that the sample standard deviation is within 40% of the population standard deviation. Find the appropriate minimum sample size. O A. 22 O B. 21 O C. 144 O D. 12

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Q: You are given the following information for a sample (mean = 40; standard deviation = 5). In the…

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Q: 2. Reflect a. If all the data in a given sample are the same, what is the standard deviation of the…

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Q: 4. The lowest and the highest data value of a data set are 12 and 28 respectively, then the…

A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will…

Q: The mean and standard deviation of a population are 200 and 20, respectively. Suppose samples of…

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Q: What is the minimum percentage of data values that will come within 3.5 standard deviations from the…

A: Here, standard deviation = k = 3.5

Q: A) What percent of car sales amounts are between $11,700 and $18,900? B) 99.7% of all people paid…

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Q: The variance of a data set is 10. What is the standard deviation of the data set? O 10 O 3.16 O 100…

A: We can find the standard deviation as below

Q: Suppose a population is unimodal and symmetric with mean 55 and standard deviation 7.  a.…

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Q: A Population has a Mean of 90 and a standard deviation of 25.  A sample of 20 college students is…

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Q: 5. If a population has a standard deviation of 16, what is the minimum number of samples that need…

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Q: You make a 1985 on your SAT. If the mean for the SAT is 1575 and the standard deviation is 400, what…

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Q: If a product has a mean demand of 80 with a standard deviation of 10, if the customer holds 100…

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Q: If you want to be 95% confident of estimating the population mean to within a sampling error of ±5…

A: formula for the sample size :

Q: The descriptive measures in a set of data are as follows: a sample mean of 50.24, a median of 49 and…

A: Following data is given, Mean =50.24, Median =  49, Standard deviation = 13.77.

Q: In a recent study on world​ happiness, participants were asked to evaluate their current lives on a…

A: Given that mean =5.4,s.d =2.6 ​(a) What response represents the88th​percentile?​(b) What response…

Q: Based on the graph of this normal distribution. a) The mean is _____ .  b) The standard deviation…

A:

Q: For a sample of n=16 scores, what is the value of the population standard deviation necessary to…

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Q: What is the correct test statistic table to use when you are comparing the mean weight of a sample…

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Q: Calculate both the sample and the population standard deviations using the data below. x | 20 25 |…

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Q: Given the mean of GRE scores is 150 and the standard deviation is 8.8. What proportion of combined…

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Q: d. State the distribution to use for the test. e. What is the test statistic? f. What is the…

A: Answer:-  d)Here distribution used for the test is Student's t distribution.

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Q: If a distribution has a mean of 35 and a standard deviation of 5, what value would be +1.5 standard…

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Q: Use the information below to determine how many standard deviations from the mean will the following…

A: Given : μ=36.4032n=129σ=64.3382x¯=12.5719

Q: Suppose a population has a mean weight of 180 pounds and a standard deviation of 25 pounds. A sample…

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Q: SEM for a sample of size 100 and standard deviation of 5.6 is equal to?   a - 14/25   b 23/100   c…

A: Given: Sample size (n) = 100 Standard deviation = 5.6

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Q: 2. The average number of customers that visited a particular store during the past year is 160 per…

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Q: :When a distribution is bell-shaped, approximately what percentage of data values Will Fall within 3…

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Q: A population has a Mean of 100 and a standard deviation of 15.  A sample of 20 college students is…

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Q: The standard deviation of the given data is A. 1.4495 B. 1.4597 C. 2.1011 D. 2.1307

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Q: he sample Round to two decimal places. X 22 17 29 27 10 13 sample standard deviation = deviation of…

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Q: If a sample of size 16 is selected from a population that follows a normal distribution with a…

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Q: Find the following z scores with a mean of 25 and a standard deviation of 4. a. 20 b. 32 c. 28…

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Q: H0: μ ≤ 16.09 vs. HA: μ > 16.09 What is the test statistic for sample of size 25, mean 13.97, and…

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Q: How many of the sample of families would fall above 2 standard deviations from the mean? A. 0 B. 1…

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Q: Which data set would you expect to have the highest standard deviation? Why? Heights (lengths) of…

A: 7. Answer: The b) Heights of all elementary school children have the highest standard deviation.

Q: Given n=10 measurements: 13, 15, 14, 16, 20, 15, 16, 19, 12, 18 The standard deviation is

A:

Q: The population has a mean of 120 and a standard deviation of 12. The sample size of your sampling…

A: The provided information are: Population mean (µ) = 120 Population standard deviation (σ) = 12…

Q: Determine the point estimate, p and the sample standard deviation, S5.

A: here n = 439 x= 162 here x= no of students working full time while going to school

Q: Use the range rule of thumb to approximate the standard deviation. 22, 29, 21, 24, 27, 28, 25, 36 O…

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Q: The standard deviation of a variable is 15. If a sample of 100 individuals is selected, what size…

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Q: Which of the following is the correct formula for the margin of error of a population mean where the…

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Q: 1. Ho:μ = 80 Ha: μ # 80 The sample mean is 83, the sample size is 39, and the standard deviation is…

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Q: A standardized memory test has a mean of μ=100 and a standard deviation of σ = 10. Answer the…

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Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.