A doctor conducts a small survey with a random sample of his patients,measuring their cholesterol levels.Here is his data (the measurements are in m.mol/L):3.66.95.14.25.57.23.05.84.99.97.15.46.24.56.38.25.74.47.93.2Find an 80% confidence interval for the mean cholesterol level of his patients.

Answered: Image /qna-images/answer/5be22d68-f6dd-4a80-be27-632a49f5ff63.jpg

Answered: doctor conducts a small survey with a…

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 tensile strength (1000 psi) of a new compound can be modeled as a normal distribution. A random sample of size 25 specimens has, as seen in the picture: Does this information tend to support or reject the claim that the population mean is 40.5?
Based on the image attached, it shows monthly wind speed data (measured in m/s) was obtained. The researcher claimed that the average wind speed distribution is less than 12m/s.
Interpret a P-value: The manufacturer of a medication designed to lower blood pressure claims that the mean systolic blood pressure for people taking their medication is less than 135. To test this claim, blood pressure is measured for a sample of 500 people who are taking the medication. The P-value for testing Ho: μ = 135 versus H₁: µ< 135 is P = 0.001. a. The manufacturer concludes that because the P-value is very small, we can be fairly certain that the mean pressure is less than 135, but we cannot conclude that it is a lot smaller. Is this conclusion justified?
A researcher interested in the lobster fishery analyzed a population of lobsters living in shallow waters off a cove in Maine. He measured the length of all the lobsters in the population. The data is shown below. Min 11.4 Table 1: Lengths of Maine Lobsters (cm); (N=2,581) Quartile 1 Q2 (Med) 23.4 41.1 Quartile 3 56.8 Max 71.5 What is true of a lobster that is 56.9 cm in length? O It's bigger than all but one of the lobsters in that area About half the lobsters in the area are bigger, and about half are smaller that that lobster It is bigger than about 25% of the lobsters in that area O About 75% of the lobsters are smaller than that lobster
Find the indicated area under the standard normal curve. Between z = - 2.23 and z = 2.23
The following table shows the hours studied and corresponding test grade earned by students on a recent test. Calculate the correlation coefficient, r, and determine whether r is statistically significant at the 0.01 level of significance. Round your answer to the nearest thousandth. Critical Values of the Pearson Correlation Coefficient Hours Studied and Test Grades Hours Studied 0 0.5 2 2.25 3.25 3.5 3.75 3.75 4 5 1 1 81 Test Grade 72 64 68 79 85 82 72 99 87 84 97
Given a normal distribution with u = 30 and o = 6, find the normal curve area to the left of x = 22. %3D Express your answer in four decimal places.
If Z is a standard normal variate, find the value of c for the following (i) P(0 c) = 0.85
The following Minitab display gives information regarding the relationship between the body weight of a child (in kilograms) and the metabolic rate of the child (in 100 kcal/ 24 hr). Predictor Сoef SE Coef T Constant 0.8462 0.4148 2.06 0.84 Weight 0.39917 0.02978 13.52 0.000 S = 0.517508 R-Sq = 94.4% (a) Write out the least-squares equation. + (b) For each 1 kilogram increase in weight, how much does the metabolic rate of a child increase? (Use 5 decimal places.) (c) What is the value of the correlation coefficient r? (Use 3 decimal places.)
Compute for the z-values that corresponds to a STATISTICS score of 85 given that µ=75 and ?=12.
FOR THE NORMAL DISTRIBUTION FIND THE AREA GREATER Z= -1.3.
The following Minitab display gives information regarding the relationship between the body weight of a child (in kilograms) and the metabolic rate of the child (in 100 kcal/ 24 hr). Predictor Coef SE Coef T P Constant 0.8651 0.4148 2.06 0.84 Weight 0.40619 0.02978 13.52 0.000 S = 0.517508 R-Sq = 97.0% (a) Write out the least-squares equation. y = + x (b) For each 1 kilogram increase in weight, how much does the metabolic rate of a child increase? (Use 5 decimal places.)(c) What is the value of the correlation coefficient r? (Use 3 decimal places.)

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