What is the 87.7 percentile of X~N(12,3)
Q: A researcher studying stress is interested in the blood pressure measurements of chief executive…
A: Claim; μ>136mm x=148 s=15
Q: Use the formula to find the standard error of the distribution of differences in sample means,…
A:
Q: An experiment was conducted to determine whether there is a significant difference among the mean…
A: Given, A B C D E 15 21 22 10 6 18 13 19 14 11 9 20 24 21 15 16 17 21 13 8
Q: An important indicator of lung function is forced expiratory volume (FEV), which is the volume of…
A: Given that Population mean=3000 Standard deviation =400 We have to find the correct statement…
Q: P(x<62) mean is 80 and standard deviation is 94
A: Mean = 80 Standard deviation = 94
Q: What percent of inchworms are more than 2 standard deviations away from the mean? By the Empirical…
A: As per empirical Rule 68% falls within the 1 standard deviation from the mean. 95% fall within 2…
Q: Help me understand how to find the Quartiles
A: Given : data To find: quartiles
Q: Pat's z-score on an exam is -1.23. In a normally distributed population with u of 25 how many…
A: Provided information is ; Pat's z-score = -1.23 population mean(μ) = 25 we know that ; z-score…
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: The table available below shows the weights (in pounds) for a sample of vacuum cleaners. The weights…
A: Bagged uprightBagless uprightTop canister212025222226231823191927201728192222
Q: A researcher studying stress is interested in the blood pressure measurements of chief executive…
A: The test to be carried out will be- H0:μ is 132 H1:μ is less than 132 Type-II error occurs when the…
Q: The time that it takes for the next train to come follows a Uniform distribution with…
A:
Q: Question 8 > Calculate the test-statistic, t with the following information. = 0.73 0.91 ni 60, ã1 =…
A: Solution
Q: A researcher studying stress is interested in the blood pressure measurements of chief executive…
A: We have to find correct answer..
Q: Every year, the students at a school are given a musical aptitude test that rates them from 0 (no…
A: Given data, Aptitude score Frequency 0 2 1 3 2 2 3 2 4 3 5 4
Q: You are studying whether CSUB's graduate students are more likely to be parents or more likely to…
A: Solution: Given information: k= 2 Categories N= 350 total observation ( frequency ) f0= 188…
Q: Please also explain why you determined whether or not the results are statistically significant. A…
A: From the given information we find the solution.
Q: The estimate of the standard error of the mean is computed as?
A:
Q: What are the null hypothesis (H,) and the alternative hypothesis (H,) that should be used for the…
A: Claim is that the mean systolic blood pressure of CEOs of major corporation is less than 134 mm Hg.…
Q: "t(7595) = 2.62, p = .01" How many standard deviations apart are the two means of this t-test?
A: We have to find distance between means.
Q: A USE SALT (a) State the null hypotheses Ho and the alternate hypothesis H,. Ho: H -Select- H:…
A:
Q: You are conducting a study to see if the average male life expectancy is significantly less than 98.…
A: given data,claim :μ<98left -tailed test test statistics :z=-2.572p-value =?
Q: A new process is being considered for the liquefaction of coal. The old process yielded a mean of 15…
A: Introduction: In a hypothesis testing problem, a Type I error occurs when the test rejects the null…
Q: One research study of illegal drug use among 12- to 17-year-olds reported a decrease in use (from…
A: Assume that p is the true proportion of illegal drug use in her school.
Q: A population of score has μ = 90. In this population, a score of X = 100 correponds to z = 5. what…
A:
Q: Complete the following table to compare men and women using data collected at the first examination…
A: Given:
Q: GRC students who took a Proficiency Exam had a μ-84 and o=6 Find X such that 5% of the mean Exam…
A: GivenMean(μ)=84standard deviation(σ)=6sample size(n)=16
Q: An economic instructor at UCF is interested in the relationship between hours spent studying and…
A: Given Information: n = 19 k = 1 SSE = 256 SSR = 3882
Q: The mean marks of statistics of 100 students of a class were 72. The mean marks of boys were 75…
A:
Q: COVxy = 0.14 Sx * Sy = 0.22 Please calculate the correlation coefficient
A: Step 1: GivenCOVxy=0.14Sx∗Sy=0.22 Step 2: The value of correlation coefficient is calculated using…
Q: A researcher studying stress is interested in the blood pressure measurements of chief executive…
A:
Q: please find the test statistic find the p-value for the found test statistic
A: Given : Sample size = 1051 Level of significance = 0.05 X = number of students who use illegal…
Q: Explain difference between three formulas that are used in t-test for two samples with real life…
A: The different types used in t-test for two samples are: Independent t-test (unpaired data) which is…
Q: A man measures his heart rate before using a treadmill and then after walking on a treadmill for 10…
A: The given data is as follows:Sample size, Sample mean of difference, Sample standard deviation of…
What is the 87.7 percentile of X~N(12,3)
Step by step
Solved in 2 steps with 1 images
- Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15. x 0.9 A graph with a bell-shaped curve, divided into 2 regions by a line from top to bottom, on the right side. The region left of the line is shaded and labeled 0.9. The x-axis below the line is labeled "x". The indicated IQ score, x, is(Round to one decimal place as needed.)You are conducting a study to see if the proportion of women over 40 who regularly have mammograms is significantly less than 50%. Your sample data resulted in a test statistic of z = - 2.655. Find the p-value accurate to 4 decimal places. p-value =A sumple from a normal population with mu = 50 and sigma = 6 of M=48.20, . the sample mean.corresponds to tz = - 1.50 , then how many scores are in the sample?
- Suppose that three drugs used to reduce cholesterol are compared in a randomized experiment in which three people use each drug for a month. The data for the reductions in cholesterol level for the N = 9 participants follow. Drug 1 Drug 2 Drug 3 6 10 4 14 12 2 9 6 Calculate the F-statistic for comparing the mean cholesterol reductions for the three drugs. What is the value of F? (report to 2 decimal places) What are the degrees of freedom for this statistic - Between df? ,Within df?Use the formula to find the standard error of the distribution of differences in sample means, ₁ - X₂. Samples of size 105 from Population 1 with mean 86 and standard deviation 13 and samples of size 80 from Population 2 with mean 73 and standard deviation 16 Round your answer for the standard error to two decimal places. standard error =Pyramid Lake is on the Palute Indian Reservation in Nevada. The lake is famous for cutthroat trout. Suppose a tells you that the average length of trout caught in Pyramid Lake Is mu = 19 Inches. Howevera survey reported that of a random sample of 46 fish caught, the mean length was overline x =18.6 lnch , with estimated standard s = 2.7 inches. these data Indicate that the average length of a trout caught in Pyramid Lake less than mu = 19 inches? Use a=0.05 Please answer ONLY parts D & E
- Overproduction of uric acid in the body can be an indication of cell breakdown. This may be an advance indication of illness such as gout, leukemia, or lymphoma.+ Over a period months, an adult male patient has taken five blood tests for uric acid. The mean concentration was x = 5.34 mg/dl. The distribution of uric acid in healthy adult males can be assumed to be normal, with σ = 1.83 mg/dl. (a) Find a 95% confidence interval for the population mean concentration of uric acid in this patient's blood. What is the margin of error? (Round your answers to two decimal places.) lower limit upper limit margin of error (b) What conditions are necessary for your calculations? (Select all that apply.) Oo is unknown O uniform distribution of uric acid F σ is known O normal distribution of uric acid On is large (c) Interpret your results in the context of this problem. O The probability that this interval contains the true average uric acid level for this patient is 0.05. O The probability that…A chemical company wishes to determine whether a new catalyst XA-100 changes the mean hourly yield of its chemical process and is different from the historical process mean of 750 pounds per hour. After 35 trials are conducted using the new catalyst, the following outputs were given: t = 6.943 at a = 0.01. If t* = 2.763, the decision is Fill in the blankUse the formula to find the standard error of the distribution of differences in sample means, x¯1-x¯2.Samples of size 115 from Population 1 with mean 94 and standard deviation 14 and samples of size 85 from Population 2 with mean 75 and standard deviation 17Round your answer for the standard error to two decimal places.standard error = Enter your answer in accordance to the question statement
- A researcher studying stress is interested in the blood pressure measurements of chief executive officers (CEOS) of major corporations. He believes that the mean systolic blood pressure, H, of CEOS of major corporations is less than 136 mm Hg, which is the value reported in a possibly outdated journal article. He plans to perform a statistical test. He measures the systolic blood pressures of a random sample of CEOs of major corporations and finds the mean of the sample to be 128 mm Hg and the standard deviation of the sample to be 16 mm Hg. Based on this information, answer the questions below. What are the null hypothesis (H) and the alternative hypothesis (H,) that should be used for the test? |Ho: H is ? |H,: µ is ? In the context of this test, what is a Type II error? A Type II error is ? fact, µ is ? v the hypothesis that u is ? when, in Suppose that the researcher decides not to reject the null hypothesis. What sort of error might he be making? ? Continue Save For Later Submit…A population of score has μ = 44. in this population, a score of X = 40 corresponds to z = -0.50. What is the population standard deviation?True or False: A correlation that is calculated to correct for unreliability or restriction of range can be above 1.0 or lower than -1.0.