38 The average score on a test of 40 students has a mean score of 53 and a standard deviation of 6. At least how many students were able to get higher than 65? * O 30 O 5 35 10

Q: 5. The population standard Deviation of a Standardized Anatomy Exam was 500 with a standard…

A: We have given that the population mean of standardized Anatomy exam was 500 and standard deviation…

Q: In a memory test, the test subjects are shown 300 objects and are asked after two hours to name the…

A: Solution: Given information: n= 300 Sample size  p= 0.75   Population proportion

Q: 21. A population has a mean of µ=35 and a standard deviation of o=5. After 3 points are added to…

A: When adding the constant to the entire data, E(X+a)=a+E(X)SD(X+a)=0+SD(X) This means that if the…

Q: A simple random sample of 40 items resulted in a sample mean of 25. The population standard…

A: Solution:- Given that  n=40                    sample mean X=25…

Q: You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe…

A: The formula for the sample size is as follows: n=zα2×σE2 Here, zα/2 is the critical value at 98%…

Q: How many TV sets? A survey organization sampled 53 households in a community and found that the…

A:

Q: You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe…

A:

Q: You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe…

A: From the provided information, Standard deviation (σ) = 77.8 Confidence level = 90% Margin of error…

Q: In a memory test, the test subjects are shown 300 objects and are asked after two hours to name the…

A: Given information: In memory test the test subject are shown 300 objects. That means, n=300 The…

Q: 26. A population of scores has u = 10 and o = 2. If every score in the population is multiplied by…

A: Given: μ=10σ=2

Q: You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe…

A: Determine the sample size needed.

Q: A population has a standard deviation of o = 24. a. On average, how much difference should exist be-…

A: Note: As per my policy i can answer only one question. kindly repost the remaining. 4) Given dataA…

Q: 10. In a distribution, the number 11 has a z-score of -1 and a standard deviation of 3. What is the…

A: We know that, Z-score of any raw data (X) is obtained as, Z=(X-μ)/σ where  σ is the standard…

Q: The minimum of 21.3% obese is ____

A: Since , the z-score is -2.2161 Our aim is to find the minimum of 21.3% obese

Q: In a memory test, the test subjects are shown 300 objects and are asked after two hours to name the…

A: We have to find given probability..

Q: mean of 100 and a standard deviation of 20.

A: Given that  A population has a mean of 100 and a standard deviation of 20. Mean (μ) = 100 Standard…

Q: 4. A population has a standard deviation of o = a. On average, how much difference should exist be-…

A: The standard error of mean is, SE = σ/√n, where σ is the population standard deviation and n is the…

Q: 12 - )) In an exam attended by 1000 people, the average of the grades is 57 and the standard…

A: To find: How many of these 56 samples averaged in the range of [57-59].

Q: A data set lists weights (Ib) of plastic discarded by households. The highest weight is 5.24 Ib, the…

A: The mean is 2.208 lb and the standard deviation is 1.971 lb.

Q: You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe…

A: Given, standard deviation, σ = 71.3 Margin of error, E = 0.1 confidence level = 99.5% The critical Z…

Q: Ho:µ = 16.435 H1:µ + 16.435 Your sample consists of 31 subjects, with a mean of 15.5. You were given…

A: given   sample size n= 31  , sample mean = 15.5   ,  standard deviation = 2.73

Q: Researchers measured the data speeds for a particular smartphone carrier at 50 airports. The highest…

A: (a) Determine the difference between carrier’s highest data speed and the mean of all 50 data…

Q: To estimate the mean score ?μ of those who took the Medical College Admission Test on your campus,…

A: Given information- Population standard deviation, σ = 6.6 Maximum error, E = 1.1

Q: We want to obtain a sample to estimate a population mean. Based on previous evidence, researchers…

A: Formula for the sample size needed to estimate a population mean is

Q: 3. Normally distributed IQ scores have a mean of 100 and a standard deviation of 15. Use the…

A:

Q: A random variable is normally distributed with a mean of 30 and a standard deviation of 4. If an…

A: A random variable is normally distributed with a mean of 30 and a standard deviation of 4. If an…

Q: An Annual Achievement Test was administered to third graders. The test has a mean score of 100 and…

A:

Q: 500 juniors at PRHS took the ACT last year. The scores were distributed normally with a mean of 24…

A: As per guideline expert have to answer first question only dear student please upload other subparts…

Q: 1. A Statistics class of 50 students has a mean test score of 38 with standard deviation of 5. a.…

A: Note- As per our policy we can answer only the first 3 sub-parts of a question. If you want…

Q: 3 - )) In an exam attended by 800 people, the average of the grades is 65 and the standard deviation…

A: Let X be a continuous random variable of grade marks is normally​ distributed with a mean of 65 and…

Q: In a memory test, the test subjects are shown 400 objects and are asked after two hours to name the…

A:

Q: Q33)) In an exam attended by 800 people, the average of the grades is 65 and the standard deviation…

A: To find: How many of these 40 samples have an average of more than 66?

Q: 8. Given IQ scores are approximately normally distributed with a mean of 100 and standard deviation…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: 4. A population has a standard deviation of o = 24. a. On average, how much difference should exist…

A:

Q: CH5: For a sample with M = 62, a score of X = 51 corresponds to z = -0.34. What is the sample…

A:

Q: 11. How many applied in the company? 12. How many of these applicants scored less than 40? 13. How…

A: Note: According to Bartleby guidelines expert solve only one question and maximum 3 subpart of the…

Q: In an exam attended by 600 people, the average of the grades is 60 and the standard deviation is…

A:

Q: Consider a population of 800 values that are normally distributed with a mean of 80 and standard…

A: Given information Mean = 80 Standard deviation= 5 Z score = x - mu /s

Q: Tind the probability that the sample mean will be between 120 and 121.8 mm Hg 5. top 2% of the…

A: According to the given question, membership is limited to people whose IQ is in the top 2% of the…

Q: 14 Select the correct answer. A population has a standard deviation of 7.89. What is the approximate…

A: Standard Deviation = 7.89 Sample Size = 300 What is the Approximate Standard Error of The Mean for a…

Q: 10. The heights of children in a school are normally distributed with mean of 113 CM and a standard…

A:

Q: Scores on an aptitude test are normally distributed with a mean of 960 and standard deviation of…

A: The number of student score above 1224 is obtained below: From the given information, the value of…

Q: 22. A set of scores ranges from a low of X = 25 to a high of X = 33 and has a mean of 29. Which of…

A: Given that  low value = 25, high value = 33 SD = ?

Q: In a memory test, the test subjects are shown 300 objects and are asked after two hours to name the…

A: From the provided information, Sample size (n) = 300 Population proportion (p) = 0.75

Q: You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe…

A: Givenσ=74.5 marginoferror= 2.5 CI=98%

Q: 6. A distribution with a u = 55 and o = 6 is standardized so that the new mean and standard…

A: We have given that.   X~N( μ , ?^2 )   Z-score =( x - μ )/?

Q: You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe…

A:

Q: 14) The scores on a mathematics exam have a mean of 68 and a standard deviation of 6. Find the…

A: Given mean, μ =68 Standard deviation, σ = 6 X ~ N(μ, σ)

Q: ñ = 36 people  you're testing the claim that the mean difference is greater than 1.1. from the…

A: From the provided information, Sample size (n) = 36 Mean (x̅d) = 1.35 Standard deviation (sd) = 0.74

Q: 1. Compute for the mean and the standard deviation.  2. What is the proportion above 87.5?  3. What…

A: here as per policy i have calculated 3 subparts   here ascending order of given data is  66, 69, 71,…