99% confidence interval for the mean of entire student.

Q: Consider a total of 1,000 people. If it was said that within 1 deviation (of the mean) of all people…

A: Using empirical rule, 68% of the data lies within one standard deviation , 95% of the data lies…

Q: For this set of data, the standard deviation (s) is equal to: 9, 8, 10, 5, 5, 2, 3, 6, 3

A: Mean:The formula for finding mean is shown below:

Q: Find the sample size need to find the Population Mean if the margin of error is $105, the confidence…

A: Solution: From the given information, confidence level is 0.95, σ=315 and E=105.

Q: Consider this scenario and answer the two questions that follow. Assume a group of students’ math…

A: Given a group of student's math grades is normally distributed with a mean of 195 and a standard…

Q: n = 11 Ex=55 Ex²=2230 Give the value of the sample standard deviation.

A:

Q: uppose a student got an examination score of 90 in Statistics and Probability, where the mean was 75…

A: We have given that.   X~N( μ , ?^2 )   μ=75     , ?=5  , X=90      for  istatistics and…

Q: The value of F is based on the ratio of the standard deviations of the two independent samples that…

A: Here use F value formula for answer the question

Q: For each problem, complete the following steps:(a) State the null and alternative hypothesis.(b)…

A: State the hypotheses. That is, the true population mean equals 55. That is, the true population…

Q: Given the interval estimate for the mean (6.2, 17.6), the point estimate for the mean is

A: Solution: From the given information, the interval estimate for the mean is (6.2, 17.6).

Q: Given the mean is 62 and the standard deviation is 8, find the z-score that corresponds to each of…

A:

Q: A group of students take a Statistics Exam where the average was M = 90 and the standard deviation…

A:

Q: Answer and show the solution. Assuming that the ages follow normal distribution with mean of 35,…

A:

Q: A researcher who she’s to estimate within $2 the average repair cost for a refrigerator.  if she…

A: From the provided information, Population standard deviation (σ) = $15.25 Confidence level = 95%…

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: If you have a 99% confidence that a population proportion is in the interval from a to b, what does…

A:

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: If you have a ND with mean 100 and standeard deviation 10. Find P(80<X<120)=

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Q: READ AND SOLVE THE FOLLOWING: Interval Estimate of Population Mean 1. Suppose that the amount of…

A: We. Have to find confidence interval for given data..

Q: The mean number of travel days per year for salespeople employed by three hardware distributors…

A: Sample size: Sample is the part of the population that will help us to draw the inference about the…

Q: For a data set of the pulse rates for a sample of adult females, the lowest pulse rate is 33 beats…

A: Note- Since you have posted a question with multiple sub-parts, we will solve the first three…

Q: How to solve the following, the additional growth of plants in one week are recorder for 6 plants…

A: Sample size = 6 Degrees of Freedom = n -1  = 6 -1 =5 Significance level = 0.1

Q: Use the given information to find the minimum sample size required to estimate an unknown population…

A: Margin of error, M.E = $500 Confidence level (α) = 95% σ =$1500

Q: What is the sample variance and the sample standard deviation for this distribution? b.  If we had…

A: Given : n=60 , SS=240 Our aim is to find the sample variance and sample standard deviation.

Q: answer the following. a. From this data calculate the Mean, Median, Mode and Standard Deviation. b.…

A: 4. a. The descriptive analysis is conducted using EXCEL. The software procedure is given below:…

Q: A group of students take a Statistics Exam where the average was M = 90 and the standard deviation…

A:

Q: Suppose​ 30% of the people in your town talk on their cell phones and drive at the same time. If you…

A: we have to find standard deviation.

Q: A variable of a population has a mean of µ = 100 and a standard deviation of σ = 28. a. Identify the…

A: a.Sampling distribution of a sample mean:

Q: We are going to calculate the standard deviation for the following set of sample data. 8 15 11 6. 3…

A: Given data, 8,5,11,9,3 standard deviation=?

Q: Past experience indicates that the standard deviation in the time it takes for a “fast lube”…

A:

Q: Compute for the sample size if the margin of error is 15, with a sample standard deviation of 55 and…

A: We have given that the margin of error is 15, with a sample standard deviation of 55 and a 95% level…

Q: For a data set of the pulse rates for a sample of adult​ females, the lowest pulse rate is 39 beats…

A: Hello there! there are more than 3 subparts in the question. According to our policies cannot answer…

Q: Given that a data set has a mean of μ=32.7 and a standard deviation of σ=1.8, find the percent of…

A: As per company guidelines I solved exactly three subparts of the question.thank you

Q: READ THE PROBLEM CAREFULLY AND ANSWER WHAT IS ASKED. SUPPOSE THAT BLOOD SUGAR LEVELS ARE NORMALLY…

A: It is given that the mean and standard deviation of normally distributed blood sugar level is μ=100…

Q: For a sample of n = 20 scores, X = 25 corresponds to z = -1.20 and X = 40 corresponds to z = +1.80.…

A:

Q: A variable of a population has a mean of u=89 and a standard deviation of o=18.  A. Identify the…

A: Central Limit Theorem for mean: If a random sample of size n is taken from a population having mean…

Q: The box model we created for the cereal toys had a mean of 30 and a standard deviation of 12.25.…

A: Given: Mean=μ=30, standard deviation=σ=12.25 and sample size=n=80.

Q: The marks of six students in a science test are represented by the variable x. The following data…

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Q: The range for a set o data is estimated to be 60. a. What is the planning value for the population…

A: Here, Range=60 a) Planning value for the population standard deviation: Planning value=Range4=604=15…

Q: Calculate the mean median mode and standard deviation of the data 21,30, 27, 30, 25

A: Given data is21,30,27,30,25sample size(n)=5

Q: The standard deviation of the given the data {14, 13, 16, 9, 3} is +

A: As per our guidelines we are suppose to answer only o ne question1)Given data set14,13,16,9,3sample…

Q: Use technology to solve the following problem: the weights of 6 week old poults (juvenile turkeys)…

A: For a random variable X, the z-score is, Z=X-μσμ=population meanσ=population standard deviation

Q: The following data set are four replicas for the measurements of the concentration in Molarity of…

A: We have to calculate the mean, median standard deviation from the following data.  Note: According…

Q: For the data shown, answer the questions. Round to 2 decimal places. x 24.9 7.9 28.9 13 29.1…

A:

Q: Contrary to popular opinion, a psychologist claims that the mean IQ score of math instructors is…

A: According to the given information in this question The p value is given  p value = 0.0014 p value =…

Q: Alice was told that her reading test score was one standard deviation below to me if test scores…

A: Given that, Alice was told that her reading test score was one standard deviation below to me if…

Q: It is given that the standard score is 2.8 and it is known that for the normal distributed data 52,…

A: The normal distribution  in the center are generally denser and basically less denser at tails.…

Q: The wingspan of a rare butterfly is normally distributed with mean (Xbar) 71.0 mm and standard…

A: Here, mean is 71.0 mm and standard deviation is 12.0 mm.

Q: A variable of a population has a mean of μ = 100 and a standard deviation of σ = 28. a. Identify the…

A:

Q: on a nal mathematics assessment test has a mean score of 281. This test result prompts a state…

A: The given claim is that the mean score for the states eighth grades on their exam is more than 275.