write an analysis for the data above and what does the p value mean?
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write an analysis for the data above and what does the p value mean?
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- Scores on a certain test are normally distributed with a variance of 70. A researcher wishes to estimate the mean score achieved by all adults on the test. Find the sample size needed to assure with 95 percent cinfidence that the sample mean will not differ from the population mean by more than 2 units. Show work.Scores on a certain test are normally distributed with a variance of 15. A researcher wishes to estimate the mean score by all adults on the test. Find the sample size needed to assure with 98% confidence that the sample mean will not differ from the population mean by more than 4 units.The standardized regression coefficient describes the relationship between X and Y in terms of ______. Group of answer choices the correlation between observed and predicted scores standard deviations the original units of measurement partitions of variance
- A Miraculin—a protein naturally produced in a rare tropical fruit—can convert a sour taste into a sweet taste. Consequently, miraculin has the potential to be an alternative low-calorie sweetener. In Plant Science (May 2010), a group of Japanese environmental scientists investigated the ability of a hybrid tomato plant to produce miraculin. For a particular generation of the tomato plant, the amount x of miraculin produced (measured in micrograms per gram of fresh weight) had a mean of 105.3 and a standard deviation of 8.0. Assume that x is normally distributed. (a) Find P(x >120).Let x = age in years of a rural Quebec woman at the time of her first marriage. In the year 1941, the population variance of x was approximately σ2 = 5.1. Suppose a recent study of age at first marriage for a random sample of 41 women in rural Quebec gave a sample variance s2 = 3.0. Use a 5% level of significance to test the claim that the current variance is less than 5.1. Find a 90% confidence interval for the population variance. Find the requested confidence interval for the population variance. (Round your answers to two decimal places.) lower and upper limitA 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, μ , of CEOs of major corporations is less than 130 mm Hg, which is the value reported in a possibly outdated journal article. He plans to perform a statistical test and measures the systolic blood pressures of a random sample of 100 CEOs of major corporations. Suppose that the population of systolic blood pressures among CEOs of major corporations has a standard deviation of 18 mm Hg and that the researcher performs his hypothesis test using the 0.05 level of significance. Based on this information, answer the questions below.
- A researcher wants to measure average cardiovascular health of university students and compare those scores to the average scores in the general population. Assuming that population variance is known, what statistical test(s) seem most appropriate for the study? (Cardiovascular health is represented by how many seconds it takes for the heart rate to return to baseline after a stress test). Paired samples t-test Independent samples t-test z-test for the sample mean ANOVATest the claim about the differences between two population variances at the given level of significance a using the given sample statistics. Assume that the sample statistics are from independent samples that are randomly selected and each population has a normal distribution. 1. Find the critical value. 2. Find the test statistic.A) find the critical value(s) assuming that the population variances are equal . B) Find the critical value (s) assuming that they population variances are not equal.
- Please shoe how to solve this problem using the TI 84 in finding the critical value. Thank you in advance Test the claim that the samples come from populations with the same mean. Assume that the populations are normally distributed with the same variance. A consumer magazine wants to compare the lifetimes of ballpoint pens of three different types. The magazine takes a random sample of pens of each type in the following table. Brand 1 260 218 184 219 Brand 2 181 240 162 218 Brand 3 238 257 241 213 Do the data indicate that there is a difference in mean lifetime for the three brands of ballpoint pens? Use a=0.01True or False. A newly proposed endoscopy method used to screen for colon cancer is tested among a random sample of the population. Given that 16 individuals from a test population of 100,000 individuals has colon cancer and 14 individuals test positive for colon cancer, the researchers should determine the sensitivity of the newly proposed screening method is .875(a) Find the critical value(s) assuming that the population variances are equal. (b) Find the critical value(s) assuming that the population variances are not equal.