How many replicate measurements are necessary to decrease the 99% confidence limits for the analysis above by 50% of the confidence limits. Standard deviation is 0.0721, Mean is 2.43, there are 5 measurements and the z value is 2.58.
Q: It takes an average of 14.5 minutes for blood to begin clotting after an injury. An EMT wants to see…
A: As per our guidelines we can solve first three sub part of question and rest can be reposted.…
Q: IQ scores are normally distributed with a mean of 67 and a standard deviation of 6. Find out the…
A: Given: X: IQ Scores
Q: If the average weight for cats is 12 pounds and the standard deviation is 2 pounds. 95 percent of…
A: Given data: average weight for cats = 12 pounds standard deviation = 2 pounds. To find: 95 % of all…
Q: support the scientist’s estimate
A: A scientist estimates that the mean nitrogen dioxide level in Westman is greater than 28 parts per…
Q: The scores on a standardized test are normally distributed with a mean of 105 and standard deviation…
A: Here, mean is 105 and standard deviation is 10.
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: The distribution for the time a patient of a medical center spends waiting for an appointment is…
A: Solution: Let X be the time a patient of a medical center spends waiting for an appointment. From…
Q: You are a researcher studying the lifespan of a certain species of bacteria. A preliminary sample…
A: The provided information are: Population standard deviation σ=4 Margin of error (E) = 0.5 Confidence…
Q: help me
A: The objective of this question is to calculate the 95% confidence interval for the mean serum…
Q: It takes an average of 11.5 minutes for blood to begin clotting after an injury. An EMT wants to…
A: Sample size n=59 Sample mean=12.3 Population standard deviation =2.35 NOTE:- According to bartleby…
Q: The class mean for the exam was 82 with a standard deviation of 6. There are 37 students in the…
A: We have given that, Mean = 82 , standard deviation σ = 6 sample size n = 37 Standard error of the…
Q: Find the z-score for the value 69, when the mean is 96 snd the standard deviation is 5. z-score= ?
A:
Q: Scores on a test have a mean of 86 and a standard deviation of 13. Jerrica has a score of 94.…
A:
Q: The weights of men in their 30s are normally distributed with a mean of 190 pounds and a standard…
A: From the provided information, Population mean (µ) = 190 pounds Population standard deviation (σ) =…
Q: The scores on a test are normally distributed with a mean of 70 and a standard deviation of 14, find…
A:
Q: It takes an average of 8.2 minutes for blood to begin clotting after an injury. An EMT wants to see…
A: Given Information : It takes an average of 8.2 minutes for blood to begin clotting after an injury.…
Q: The cholesterol levels of an adult can be described by a normal model with a mean of 188mg/dL and a…
A: Obtain the percent of adults expect to have cholesterol levels over 200mg/dL. The percent of adults…
Q: It takes an average of 8.6 minutes for blood to begin clotting after an injury. An EMT wants to see…
A: From the provided information, Sample size (n) = 65 Sample mean (x̅) = 8.7 Standard deviation (σ) =…
Q: The scores on a standardized test are normally distributed with a mean of 80 and standard deviation…
A:
Q: It takes an average of 9.9 minutes for blood to begin clotting after an injury. An EMT wants to see…
A: From the provided information,
Q: a. For this study, we should use Select an answer b. The null and alternative hypotheses would be:…
A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…
Q: The mean grade on a statistics exam is/M=82, the standard deviation is=12. What actual grade has a…
A: The normal distribution in the center are generally denser and basically less denser at tails.…
Q: samples of n = 100 from
A:
Q: he scores on a standardized test are normally distributed with a mean of 105 and standard deviation…
A: Consider X be the random variable representing the he scores on a standardized test. X is…
Q: A sample of 3000 observations has a mean of 88 and a standard deviation of 13. The distribution is…
A: Solution : Given: n = 3000 samples x¯ = 88 s = 13 For bell…
Q: What raw score is needed to be in the bottom 28%? A group of students take a exam and the adverage…
A: Given that, For a normally distributed random variable, X with mean μ, and standard deviation σ, the…
Q: What is the corresponding Z score ? Mean is 70, standard deviation is 10 and X= 89
A: We have to find z score.
Q: The distribution for the time a patient of a medical center spends waiting for an appointment is…
A: Given data, μ=35σ=12P(X>60)=?
Q: Use Chebyshev's Theorem to find what percent of the values will fall between 120 and 150 for a data…
A: The percentage of observations that are within k std dev. of the mean is 100(1-1k2)%
Q: A distribution of values is normal with a mean of 103.6 and a standard deviation of 63.6. Find P62,…
A:
Q: a male polar on average weighs 525 kg the population of standard deviation is 58 kg suppose that the…
A: Given information- Population mean, µ = 525 kg Population standard deviation, σ = 58 kg Let X be the…
Q: Dwight wants to estimate the mean calorie content in beets with 90% confidence. He believes that…
A: The population standard deviation, sigma is 17. The z-critical value for the 90% confidence interval…
Q: A distribution of values is normal with a mean of 107.8 and a standard deviation of 82.8. Find P70,…
A: given data, normal distribution μ=107.8σ=82.8p70 score of the class =?
Q: It takes an average of 9.1 minutes for blood to begin clotting after an injury. An EMT wants to see…
A: The sample size is .The sample mean is .The sample standard deviation is .The significance level is…
Q: The scores on a standardized test are normally distributed with a mean of 105 and standard deviation…
A: Let k is 0.6 standard deviation below the mean. That means -0.6 is the z score of the value.…
Q: It takes an average of 8 minutes for blood to begin clotting after an injury. An EMT wants to see if…
A: Solution:- from given information claim: if the average of 8 minutes will increase if the patient…
Q: One year, the mean age of an inmate on death row was 39.2 years. A sociologist wondered whether the…
A:
Q: It takes an average of 9.9 minutes for blood to begin clotting after an injury. An EMT wants to see…
A: The level of significance is 0.01.
Q: A distribution of values is normal with a mean of 228.9 and a standard deviation of 36.6. Find P57,…
A: The z-score for probability value 0.57 is +0.18 0.18=x-228.936.66.588=x-228.9x=6.588+228.9x=235.488
Q: A distribution of values is normal with a mean of 178.9 and a standard deviation of 78.7. Find P37…
A: Given Data : Population Mean,μ = 178.9 Population Standard Deviation,σ = 78.7
Q: The variable x is normally distributed with a mean of 500 and a standard deviation of 43. Find the…
A:
Q: The scores on a standardized test are normally distributed with a mean of 90 and standard deviation…
A: The test score is 0.6 standard deviations above the mean is obtained below: From the given…
Q: It takes an average of 8 minutes for blood to begin clotting after an injury. An EMT wants to see if…
A:
Q: The mean test score for a history test is 63 with a standard deviation of 9. The mean test score for…
A: It is given that the mean test score and standard deviation for history test are 63 and 9, the mean…
How many replicate measurements are necessary to decrease the 99% confidence limits for the analysis above by 50% of the confidence limits. Standard deviation is 0.0721,
Step by step
Solved in 4 steps
- THE SCORES ON THE SAT MATH HAD A MEAN OF 431 AND A STANDARD DEVIATION OF 117. What percent of students scored between a 314 and 548? THE SCORES ON THE SAT MATH HAD A MEAN OF 431 AND A STANDARD DEVIATION OF 117? How many students scored between a 314 and 548 if 800 students were taking the test? Find the z-score of a car getting 22.4 mpg if the mean mpg is 23.5 with a standard deviation of 1.5 mpg. Round to nearest hundredths if needed.The mean pulse rate (in beats per minute) of adult males is equal to 69 bpm. For a random sample of 155 adult males, the mean pulse rate is 69.9 bpm and the standard deviation is 11.4 bpm. Find the value of the test statistic. The value of the test statistic is enter your response here. (Round to two decimal places as needed.only G
- The scores on a test are normally distributed with a mean of 150 and a standard deviation of 30. Find the score that is 2 1/2 standard deviations above the mean.When engaging in weight-control (fitness/fat burning) types of exercise, a person is expected to attain approximately 60% of his or her maximum heart rate. For 20-year-olds, this rate is approximately 120 bpm. A simple random sample of one hundred 20-year-olds was taken, and the sample mean was found to be 107 bpm, with a standard deviation of 45 bpm. Researchers wonder if this is evidence to conclude that the expected level is actually lower than 120 bpm. To determine this, we test the following hypotheses: Ho: H= 120 versus H₂ μ< 120 Suppose the mean and standard deviation obtained were based on a sample of size 25 rather than 100.A group of 70 Western Grey Squirrels were studied in Los Angeles . The sample mean of these squirrels was found to be 1.73 pounds. Based on previous studies we can assume that the standard deviation of this squirrel population, o, is 0.13. 1. Find a 90% confidence interval for the average weight of Western Grey Squirrels in the study region. (Round to three decimal places) ter 2. Interpret your result. Make sure to answer both questions. Write down what test you used from your calculator and the values you entered.
- The mean score of a class of 30 students in their math test is 6.267. The standard deviation is 1.9 and at 95% confidence, the class interval was found to be CI = (5.587, 6.947). If the passing score is 7.5, did the class passed the test?The height of men in the United states fits with a normal distribution with a mean of 70 inches and a standard deviation of 3 inches. What height represents the 50th percentile of men heights in the United states?IQ is normally distributed with a mean of 100 and a standard deviation of 16. A local school is considering what its minimum IQ score should be for admission. What should the minimum IQ score be so that 90% of all students in the area can qualify for admission? How can I calculate this using Excel or by hand
- It takes an average of 9.9 minutes for blood to begin clotting after an injury. An EMT wants to see if the average will decline if the patient is immediately told the truth about the injury. The EMT randomly selected 50 injured patients to immediately tell the truth about the injury and noticed that they averaged 9.2 minutes for their blood to begin clotting after their injury. Their standard deviation was 3.79 minutes. What can be concluded at the the 0.05 level of significance? a. The test statistics t = (please show your answer to 3 decimal places.) b. The p-value = (Please show your answer to 4 decimal places.)The standard deviation of the weights of elephants is known to be approximately 15 pounds. We wish to construct a 95% confidence interval for the mean weight of newborn elephant calves. Fifty newborn elephants are weighted. The sample mean is 244 pounds. The sample deviation is 11 pounds. State the distribution needed. Explain your reasoning. SEAn exam score has a mean of 504 and standard deviation of 90. What exam score coresponds to a Z-score of 1.60?
