z Instructions Question 1 Distribution of a blood pressure measurements has a mean of 130 and...
From information on a previous question: The mean systolic blood pressure for a population of patients (µ) from a local clinic is 130 with a standard deviation (σ) of 18. What is the z-score for a patient with a systolic blood pressure of 126? Rounded to the nearest hundredth.
4. An unknown distribution has a mean of 90 and a standard deviation of 15. Samples of size n 25 are drawn randomly from the population. Find the z-value for X = 87 and 92. Find the probability that the sample mean is less than 87. Find the probability that the sample mean is greater than 92 theprobhity tt
Questions 23-30: A normal population has a mean μ = 50 and a standard deviation σ = 8. That is, ?~?(50,8). Circle your final answer for each question below. 23. What is the z-score for an individual with a value of 38? 24. What is the probability that a randomly chosen individual from this population will be greater than 40? 25. What is the probability that a randomly chosen individual from this population will be between 44 and 60? 26....
= X- 4) A normal distribution has mean u = 65 and a population standard deviation o= 20. Find and interpret the z - Score for x = 64. u a) The z - score for x = 64 is 64-65 b) Interpret these results. (Explain): 5) A sample size 28 will be drawn from a population with mean 120 and standard deviation 21. a) Is it appropriate to use the normal distribution to find probabilities for x? yes or...
1. A population has a mean of 60 and a standard deviation of 30. Samples of size 16 are randomly selected. Calculate the standard deviation of the sample distribution X. 2. Samples of size 16 are drawn from a population. the sampling distribution for X has a standard deviation of 0.25. Find the standard deviation of the population. 4. Tires are found to have a mean life of 40,000 miles. The standard deviation is 8000. A sample of 400 is...
Question 6 2 pts An unknown distribution has a mean of 80 and a standard deviation of 13. Samples of size n-35 are drawn randomly from the population. Find the probability that the sample mean is between 82 and 92. (round to 4 decimal places) Example page 397 Wk6Hw_SmpMean 1
Question 5 2 pts An unknown distribution has a mean of 75 and a standard deviation of 18. Samples of size n-30 are drawn randomly from the population. Find the probability that the sample mean is between 80 and 85. (round to 4 decimal places) Example page 397 Wk6Hw_Smp Mean3
5.4.1 Question Help A population has a mean = 141 and a standard deviation o = 28. Find the mean and standard deviation of the sampling distribution of sample means with sample size n = 40. The mean is :-), and the standard deviation is 0;=0 (Round to three decimal places as needed.) 5.4.2 Question Help A population has a meanu - 74 and a standard deviation = 8. Find the mean and standard deviation of a sampling distribution of...
22. If a population of measurements has a mean of 2.45 inches and a sta a. Find the μ 3c spread of measurements. b. What percentage of the measurements will lie within the values found in part (a)? c. ndard deviation of.15 inches, If samples of size n-5 are taken from the population, between what values will 99.73% of the sample means fall?
A health study reported that, in one country, systolic blood pressure readings have a mean of 119 and a standard deviation of 15 . A reading above 140 is considered to be high blood pressure. Complete parts a through d below. a) What is thez-score for a blood pressure reading of130? b) If systolic blood pressure in that country has a normal distribution, what proportion of the population suffers from high blood pressure? c) What proportion of the population has...