Purchase Solution

Applying statistics for smokers and nonsmokers

Not what you're looking for?

Ask Custom Question

Dr. Z at the Clinic wishes to see whether the pulse rates of smokers are higher than the pulse rates of nonsmokers. Samples of 100 smokers and 100 nonsmokers are selected. The results are shown here. Can Dr. Z conclude, at alpha = 0.05, that the smokers have higher pulse rates than nonsmokers? Assume the samples come from a normal population. Use Minitab to help solve the problem if using statistical software.

Smokers
Sample mean = 90
Standard deviation = 5
Sample size = 100

Nonsmokers
Sample mean = 88
Standard deviation = 6
Sample size = 100

State the hypothesis:

Find the critical value:

Identify and Compute the test value:

Make a decision:

Interpret the results within the context of the problem:

Purchase this Solution
Solution Summary

The solution applies statistics for smokers and non-smokers using minitab to determine is smokers have higher pulse rates.

Solution Preview

Dr. Z at the Clinic wishes to see whether the pulse rates of smokers are higher than the pulse rates of nonsmokers. Samples of 100 smokers and 100 nonsmokers are selected. The results are shown here. Can Dr. Z conclude, at  = 0.05, that the smokers have higher pulse rates than nonsmokers? Assume the samples come from a normal population. Use ...

Solution provided by:
Changping Wang, MA
Education
  • BSc , Wuhan Univ. China
  • MA, Shandong Univ.
Recent Feedback
  • "Your solution, looks excellent. I recognize things from previous chapters. I have seen the standard deviation formula you used to get 5.154. I do understand the Central Limit Theorem needs the sample size (n) to be greater than 30, we have 100. I do understand the sample mean(s) of the population will follow a normal distribution, and that CLT states the sample mean of population is the population (mean), we have 143.74. But when and WHY do we use the standard deviation formula where you got 5.154. WHEN & Why use standard deviation of the sample mean. I don't understand, why don't we simply use the "100" I understand that standard deviation is the square root of variance. I do understand that the variance is the square of the differences of each sample data value minus the mean. But somehow, why not use 100, why use standard deviation of sample mean? Please help explain."
  • "excellent work"
  • "Thank you so much for all of your help!!! I will be posting another assignment. Please let me know (once posted), if the credits I'm offering is enough or you ! Thanks again!"
  • "Thank you"
  • "Thank you very much for your valuable time and assistance!"
Purchase this Solution
Free BrainMass Quizzes
Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.

Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

View More Free Quizzes
Related BrainMass Solutions

  • Inference

    Can the company conclude at the 10% significance level that smokers have higher incidence of heart disease than nonsmokers?

    There are 38 smokers and 162 non-smokers.

  • Test Statistic for Medical Researchers

    134602 Test Statistic for Medical Researchers A medical researcher suspects that the pulse rate of smokers is higher than the pulse of non smokers. Use the sample statistics below to test the researchers suspicion.

  • Hypothesis Medical Researcher Pulse Rates

    Solution attached. 13) A medical researcher wishes to see whether the pulse rates of smokers are higher than the pulse rates of nonsmokers. Samples of 100 smokers and 100 nonsmokers are selected. The results are shown here.

  • Probability of Smokers

    158337 Probability of Smokers For questions 1 through 3 use the table below. The table shows the number of smokers and nonsmokers by gender among 220 people. Assume one person is chosen at random from the 220.

  • Independent sample t test-Lung Damage

    For one of the indexes the scores yielded by the lunges of a sample of 9 nonsmokers and a sample of 16 smokers is shown in Table 1.

  • smokers and nonsmokers on depression scores

    Results for smokers and nonsmokers on depression scores are presented.

  • Probability a given patient if the patient has a serious illness

    That is 77 non-smokers out of 100 Chance of contracting a serious illness, 18% of smokers => (18/100)* (23 /100) => 0.0414 0.06% of nonsmokers =>(6/100)*(87/100) => 0.0522 Probability of that a given patient has serious illness = (0.0414

  • Observational study and some terms on design of experiment

    Go to http://www.xuru.org/st/DS.asp and find the summary statistics for both non-smokers and smokers (mean, median, standard deviation, quartiles.) Compute each group separately. Report your findings.

  • Chi-Square test by hand

    Based on this, write a short comparison of the differences in self-evaluation of health for current smokers and nonsmokers.

View More Related Solutions