An experiment was planned to compare the mean time (in days) required to recover from acommon cold for persons given a daily dose of 4 milligrams (mg) of vitamin C versus thosewho were not given a vitamin supplement. Suppose that 35 adults were randomly selected foreach treatment category and that the mean recovery times and standard deviation for the twogroups were as follows:4 mg vitamin C No vitamin supplement35Sample sizeSample meanSample standard deviation356.95.82.21.2(Assume that variance populations are equal)If a claim states that the mean time required to recover from a commoncold for persons given a daily dose of vitamin C is not equal to those whowere not given a vitamin supplement, write the suitable hypothesisstatements. *Your answerAt 5% significance level, find the critical value(s) for the above hypothesis.Your answerCalculate the test statistic. *Your answer

Name: An experiment was planned to compare the mean time (in days) required
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: An experiment was planned to compare the mean time (in days) required to recover from acommon cold for persons given a daily dose of 4 milligrams (mg) of vitamin C versus thosewho were not given a vitamin supplement. Suppose that 35 adults were rand

Null and Alternative Hypotheses The following null and alternative hypotheses need to be tested:…

Math

Statistics

If a claim states that the mean time required to recover from a common cold for persons given a daily dose of vitamin C is not equal to those who were not given a vitamin supplement, write the suitable hypothesis statements. * Your answer At 5% significance level, find the critical value(s) for the above hypothesis. Your answer Calculate the test statistic. *

If a claim states that the mean time required to recover from a common cold for persons given a daily dose of vitamin C is not equal to those who were not given a vitamin supplement, write the suitable hypothesis statements. * Your answer At 5% significance level, find the critical value(s) for the above hypothesis. Your answer Calculate the test statistic. *

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

The table below summarizes baseline characteristics of patients participating in a clinical trial. a) Are there any statistically significant differences in baseline characteristics between treatment groups? Justify your answer. Characteristic Placebo (n = 125) Experimental ( n =125) P Mean (+ Sd. Age 54 + 4.5 53 + 4.9 0.7856 % Female 39% 52% 0.0289 % Less than High School Education 24% 22% 0.0986 % Completing High School 37% 36% % Completing Some College 39% 42% Mean (+ Sd. Systolic Blood Pressure 136 + 13.8 134 + 12.4 0.4736 Mean (+ Sd. Total Cholesterol 214 + 24.9 210 + 23.1 0.8954 % Current Smokers 17% 15% 0.5741 % with Diabetes 8% 3% 0.0438
During the 1990s, the fatality rate for lung cancer was 80 per 100,000 people. After the turn of the century and the establishment of newer treatments and adjustment in public health advertising, a random sample of 10,000 people exhibits only six deaths due to lung cancer. Test at the 0.05 significance level whether that data are proof of a reduced fatality rate for lung cancer. b. Make the decision rule. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.) c. Evaluate the test statistic. (Negative amount should be indicated by a minus sign. Round your answer to 3 decimal places.)
UBS Wealth Management UK periodically ask their customers to evaluate their financial consultants and services. The higher the customer rating, the better the perceived service. The maximum rating is 7. Independent samples of two financial consultants are given below. Consultant A has 10 years' experience, Consultant B has 1 years' experience. Use α = 0.05 and test to see whether the consultant with more experience has the higher population mean service rating. Consultant A Consultant B N1 = 16 N2 = 10 Mean1 = 6.82 Mean2 = 6.25 S1= 0.64 S2 = 0.75 State the null and alternative hypothesis, Compute the value of the test statistic. What is the p-value? What is your conclusion?
The table below summarizes baseline characteristics of patients participating in a clinical trial. a) Are there any statistically significant differences in baseline characteristics between treatment groups? Justify your answer. Characteristic Placebo (n = 125) Experimental ( n =125) P Mean (+ SD) Age 54 + 4.5 53 + 4.9 0.7856 % Female 39% 52% 0.0889 % Less than High School Education 24% 22% 0.0386 % Completing High School 37% 36% % Completing Some College 39% 42% Mean (+ SD) Systolic Blood Pressure 136 + 13.8 134 + 12.4 0.4736 Mean (+ SD) Total Cholesterol 214 + 24.9 210 + 23.1 0.8954 % Current Smokers 17% 15% 0.0441 % with Diabetes 8% 3% 0.0938
Sdfg
The average home in the US is expected to cost $240,000. A random sample of 56 homes sold this month showed average price of $232,000. Assume you have access to this data. We are interested in determining cost if the cost of average home has decreased this month. If the test statistic is -1.66 what is the p-value?
Fertilizer: A new type of fertilizer is being tested on a plot of land in an orange grove, to see whether it increases the amount of fruit produced. The mean number of pounds of fruit on this plot of land with the old fertilizer was 381 pounds. Agriculture scientists believe that the new fertilizer may increase the yield. State the appropriate null and alternate hypotheses. Answer the following question.
A program administrator at a high school wanted to see if there was a significant association between experiencing verbal abuse and anxiety in teenage women. She wasn't sure what to expect. Perform the correct statistical procedure to assess the degree of association between these variables and interpret your findings. Set alpha = .05 for your statistical test. YOU CAN EITHER TYPE YOUR WORK OUT HERE OR TAKE A PICTURE OF HANDWRITTEN WORK AND EMAIL IT TO ME. %3D Anxiety Verbal Abuse 5. 4. 4.
IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. A charter school wants to know if their students have an average IQ that is higher than the population average. They take a random sample of 25 students and find a mean IQ of 108 with a standard deviation of 21. Use a 5% significance level. What is the P value with work? Do we reject the null hypothesis in this case? What does the hypothesis test say about the mean pulse rate.
Ten individuals went on a low-fat diet for 12 weeks to lower their cholesterol. The data are recorded in the table below. Do you think that their cholesterol levels were significantly lowered? Conduct a hypothesis test at the 5% level. Starting cholesterol level Ending cholesterol level 140 140 200 230 110 130 240 220 200 190 180 150 190 200 360 300 280 300 260 240 a. State the null hypothesis. b What is the test statistic?
Serving Time. According to the Bureau of Crime Statistics and Research of Australia, as reported on Lawlink, the mean length of imprisonment for motor-vehicle-theft offenders in Australia is 16.7 months. You want to perform a hypothesis test to decide whether the mean length of imprisonment for motor-vehicle-theft offenders in Sydney differs from the national mean in Australia. Serving Time. Refer to Exercise 9.19. Explain what each of the following would mean. a. Type I errorb. Type II error c. Correct decisionNowsuppose that the results ofcarrying out the hypothesis test lead to nonrejection of the null hypothesis. Classify that conclusion by error type or as a correct decision if in fact the mean length of imprison-ment for motor-vehicle-theft offenders in Sydney d. equals the national mean of 16.7 months. e. differs from the national mean of 16.7 months.
A publisher reports that 69 % of their readers own a particular make of car. A marketing executive wants to test the claim that the percentage is actually under the reported percentage. A random sample of 200 found that 60% of the readers owned a particular make of car. Is there sufficient evidence at the 0.10 level to support the executive's claim? Step 5 of 7: Identify the value of the level of significance.