Diagnostic Tests by F. Fischbach). Red blood cell volume that is too low ortoo high can indicate a medical problem (see reference). Suppose that Rogerhas had seven blood tests, and the red blood cell volumes were32254135303729The sample mean is x 32.7 ml/kg. Let x be a random variable thatrepresents Roger's red blood cell volume. Assume that x has a normaldistribution and o = 4.75. Do the data indicate that Roger's red bloodcell volume is different (either way) from u = 28 ml/kg? Use a 0.01 levelof significance.%3D

Answered: Image /qna-images/answer/6f8f74b9-8507-401c-9f4b-5c0449091fd0.jpg

Answered: Diagnostic Tests by F. Fischbach). Red…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The number of calories in a 12-oz serving of randomly selected regular and lite beers is recorded and the summarized statistics is below. Is there sufficient evidence to conclude that the mean number of calories for lite beers is the same as that for the regular beers? Use alpha of .1. Assume the variables are approximately normally distributed. Variable N Mean StDev regular 25 140.08 19.56 lite 23 122.90 18.19
.Gentle Ben is a Morgan horse at a Colorado dude ranch. Over the past 8 weeks, a veterinarian took the following glucose readings from this horse (in mg/100ml).93 88 83 105 99 110 87 89Let x be a random variable representing glucose readings taken from Gentle Ben. We may assume that x has a normal distribution, and we know from past experience that ? = 12.8 . The mean glucose level for horses should be ? = 86 mg/100 ml. Do these data indicate that Gentle Ben has an overall average glucose level higher than 86? Use ? = 0.05. d. What sampling distribution will you use? Explain the rationale for your choice of sampling distribution.e. Compute the sample test statistic.f. Using Critical region method, find (or estimate) the critical value. Sketch the sampling distribution and show the area corresponding to the critical region.
Let x be a random variable representing dividend yield of bank stocks. We may assume that x has a normal distribution with ? = 3.3%. A random sample of 10 bank stocks gave the following yields (in percents). 5.7 4.8 6.0 4.9 4.0 3.4 6.5 7.1 5.3 6.1 The sample mean is x = 5.38%. Suppose that for the entire stock market, the mean dividend yield is ? = 4.9%. Do these data indicate that the dividend yield of all bank stocks is higher than 4.9%? Use ? = 0.01. (a) What is the level of significance?State the null and alternate hypotheses. Will you use a left-tailed, right-tailed, or two-tailed test? H0: ? > 4.9%; H1: ? = 4.9%; right-tailedH0: ? = 4.9%; H1: ? < 4.9%; left-tailed H0: ? = 4.9%; H1: ? ≠ 4.9%; two-tailedH0: ? = 4.9%; H1: ? > 4.9%; right-tailed (b) What sampling distribution will you use? Explain the rationale for your choice of sampling distribution. The standard normal, since we assume that x has a normal distribution with known ?.The Student's t, since n is…
Let x be a random variable representing dividend yield of bank stocks. We may assume that x has a normal distribution with ? = 3.2%. A random sample of 10 bank stocks gave the following yields (in percents). 5.7 4.8 6.0 4.9 4.0 3.4 6.5 7.1 5.3 6.1 The sample mean is x = 5.38%. Suppose that for the entire stock market, the mean dividend yield is ? = 4.3%. Do these data indicate that the dividend yield of all bank stocks is higher than 4.3%? Use ? = 0.01. (a) What is the level of significance?State the null and alternate hypotheses. Will you use a left-tailed, right-tailed, or two-tailed test? H0: ? > 4.3%; H1: ? = 4.3%; right-tailedH0: ? = 4.3%; H1: ? ≠ 4.3%; two-tailed H0: ? = 4.3%; H1: ? < 4.3%; left-tailedH0: ? = 4.3%; H1: ? > 4.3%; right-tailed (b) What sampling distribution will you use? Explain the rationale for your choice of sampling distribution. The Student's t, since n is large with unknown ?.The standard normal, since we assume that x has a normal…
A physical therapist wanted to know whether the mean step pulse of men was less than the mean step pulse of women. She randomly selected 54 men and 70 women to participate in the study. Each subject was required to step up and down a 6-inch platform. The pulse of each subject was then recorded. The following results were obtained. Two sample T for Men vs Women N Mean StDev SE Mean Men Women 98% CI for mu Men - mu Women (- 12.20, - 1.00) T-Test mu Men = mu Women (vs H2 O C. Ho: H1 = H2; Ha: H1 #H2 (b) Identify the P-value and state the researcher's conclusion if the level of significance was a = 0.01. What is the P-value? P-value =
When subjects were treated with a drug, their systolic blood pressure readings (in mm Hg) were measured before and after the drug was taken. Results are given in the table below. Assume that the paired sample data is a simple random sample and that the differences have a distribution that is approximately normal. Using a 0.01 significance level, is there sufficient evidence to support the claim that the drug is effective in lowering systolic blood pressure? Before 178 201 205 179 206 164 175 169 167 189 183 188 After 179 173 177 147 166 164 158 162 186 143 155 144 In this example, Ha is the mean value of the differences d for the population of all pairs of data, where each individual difference d is defined as the systolic blood pressure reading before the drug was taken minus the reading after the drug was taken. Identify the test statistic. (Round to two decimal places as needed.) Identify the P-value. P-value = (Round to three decimal places as needed.) than the significance level,…
This one has me stuck, please help; Thank you.
When subjects were treated with a drug, their systolic blood pressure readings (in mm Hg) were measured before and after the drug was taken. Results are given in the table below. Assume that the paired sample data is a simple random sample and that the differences have a distribution that is approximately normal. Using a 0.01 significance level, is there sufficient evidence to support the claim that the drug is effective in lowering systolic blood pressure? Before 169 205 188 183 167 164 157 175 188 158 189 159 After 186 143 184 144 177 188 152 162 179 159 155 163
Calculate the missing values in the Stata output (SKIP E!!!). Two-sample t test with A variances X y combined diff Obs Ho: diff = 0 49 30 79 diff = mean(x) Ha: diff |t|) = Std. Dev. 6.5 7.4 6.935314 G E [95% Conf. Intervall 40.33298 39.62126 C F degrees of freedom = 44.86702 Pr{T > t) 42.72811 1.6996 77 Ha: diff > 0 H
Let x be a random variable representing dividend yield of bank stocks. We may assume that x has a normal distribution with ? = 2.5%. A random sample of 10 bank stocks gave the following yields (in percents). 5.7 4.8 6.0 4.9 4.0 3.4 6.5 7.1 5.3 6.1 The sample mean is = 5.38%. Suppose that for the entire stock market, the mean dividend yield is ? = 4.9%. Do these data indicate that the dividend yield of all bank stocks is higher than 4.9%? Use ? = 0.01. (c) Find (or estimate) the P-value. (Enter a number. Round your answer to four decimal places.) ?Sketch the sampling distribution and show the area corresponding to the P-value. (Select the correct graph.)
Let x be a random variable representing dividend yield of bank stocks. We may assume that x has a normal distribution with ? = 1.8%. A random sample of 10 bank stocks gave the following yields (in percents).5.7 4.8 6.0 4.9 4.0 3.4 6.5 7.1 5.3 6.1
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