STAT 167

# STAT 167

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STAT 167 All Assignments

STAT 167 Statistics For The Life Sciences Week 2 Individual Assignment DataOrganizing, Summarizing, Probability, and Distribution Worksheet 1.    Look at the following presentation of data: Is this a histogram, a frequency distribution, a box-plot, or a scatterplot? Describe the method of presenting data that you identify. For each component of the data presentation method you describe, identify the corresponding section in this example (0.5 point). 2.    Look at the following presentation of data: Is this a histogram, a frequency distribution, a box-plot, or a scatterplot? Describe the method of presenting data that you identify. For each component of the data presentation method you describe, identify the corresponding section in this example (0.5 point). 3.    Look at the following presentation of data: Is this a histogram, a frequency distribution, a box-plot, or a scatterplot? Describe the method of presenting data that you identify. For each component of the data presentation method you describe, identify the corresponding section in this example (0.5 point). 4.    Using Statdisk, create a histogram showing the information in the frequency distribution of Table 2-2 in Ch. 2 of the text. 5.    Calculate the mean of the students exercise capacity and explain the concept of mean (0.5 point). 6.    Calculate the median of the students exercise capacity and explain the concept of median (0.5 point). 7.    Calculate the mode of the students exercise capacity and explain the concept of mode (0.5 point). 8.    Calculate the standard deviation of the students exercise capacity (0.5 point). 9.    Calculate the variance of the students exercise capacity (0.5 point). 10.    If premedical student Alisha has the exercise capacity of 41 minutes, convert her score to a z score among the distribution of exercise capacity above. Explain what this z score means (1 point). 11.    Alishas grandmother has an exercise capacity of 21 minutes, as measured in a similar study among Americans over seventy years old. The study sample has a mean of 16.8 minutes and a standard deviation of 3.9 minutes. Convert Alishas grandmothers score to a z score among the distribution of exercise capacity in Americans over seventy years old. Who has a relatively longer exercise capacity compared to her peersAlisha or her grandmother (1 point)? 12.    A friend suggests to you that each of the four teams in the semifinals has an equal chance of winning the championship. Express this likelihood for each team of winning the championship as a probability value. Explain the concept of probability (1 point). 13.    In a study of 420,095 cell phone users in Denmark, it was found that 135 developed cancer of the brain or nervous system. Estimate the probability that a randomly selected cell phone user will develop such a cancer. Is the result very different from the probability of 0.000340 that was found for the general population? What does the result suggest about cell phones as a cause of such cancers, as has been claimed (1 point)? 14.    If you randomly select one butterfly from the table above, what is the probability of selecting a red butterfly or one collected in spring? Explain the addition rule (1 point). 15.    If you randomly select one butterfly collected in spring, one butterfly collected in summer, and one butterfly collected in autumn, what is the probability of selecting all yellow butterflies? Explain the multiplication rule (1 point). 16.    In a survey of 1,012 people, researchers record whether there is a should not response to this question: Do you think the cloning of humans should or should not be allowed? Does this procedure result in a binomial distribution? Explain why or why not (1 point). 17.    In a study, 728 artificial hips are examined to determine whether they are acceptable, show excessive wear, or have manufacturing defects. Does this procedure result in a binomial distribution? Explain why or why not (1 point). 18.    Choose the procedure that will allow dental patients to be researched using a binomial distribution (0.5 point): 19.    Select the procedure that results in a Poisson distribution and explain (1 point). 20.    Choose the procedure that will allow fire ants to be researched using a Poisson distribution (0.5 point).

Week 3 Learning Team Life Science Article Analysis

Week 4 Individual Assignment Distribution, Hypothesis Testing, and Error Worksheet 1.    Describe a normal distribution in no more than 100 words (0.5 point). 2.    Construct a normal quantile plot in Statdisk, show the regression line, and paste the image into your response. Based on the normal quantile plot, does the data above appear to come from a population of Bigcone Douglas-fir tree ages that has a normal distribution? Explain (0.5 point). 3.    Calculate the sample mean and standard deviation for the age of Bigcone Douglas-fir trees based on the data above. If this accurately represents the population mean and standard deviation for the age of surviving Bigcone Douglas-fir trees in the burn area, what is the probability that a randomly selected surviving Bigcone Douglas-fir tree from the burn area will be 111 years old or less? Round to the nearest hundredth (0.5 point). 4.    Calculate the sample mean and standard deviation for the age of Bigcone Douglas-fir trees based on the data above. If this accurately represents the population mean and standard deviation for the age of surviving Bigcone Douglas-fir trees in the burn area, what is the probability that a randomly selected surviving Bigcone Douglas-fir tree from the burn area will be less than 0 years old? Round to the nearest hundredth. Based on this result, is it logical to assume that the population of age of surviving Bigcone Douglas-fir trees in the burn area is normally distributed with the parameters identified. Why or why not (0.5 point)? 5.    Describe a standard normal distribution in no more than 100 words (0.5 point). 6.    In a standard normal distribution, what is the probability of randomly selecting a value between -2.555 and -0.745? Round to four decimal places (0.5 point). 7.    Describe a uniform distribution in no more than 100 words (0.5 point). 8.    Describe the sampling distribution of the mean in no more than 100 words (1 point). 9.    Explain the central limit theorem in no more than 150 words (1 point). 10.    Describe the z distribution in no more than 100 words (0.5 point). 11.    Explain when the z distribution can be used in no more than 150 words (0.5 point). 12.    Describe the t distribution in no more than 100 words (0.5 point). 13.    Explain when the t distribution can be used in no more than 150 words (0.5 point). 14.    Describe the chi-square distribution in no more than 100 words (0.5 point). 15.    Explain when the chi-square distribution can be used in no more than 150 words (0.5 point). 16.    Determine the appropriate approach to conduct a hypothesis test for this claim: Fewer than 5% of patients experience negative treatment effects. Sample data: Of 500 randomly selected patients, 2.2% experience negative treatment effects (0.5 point). 17.    Determine the appropriate approach to conduct a hypothesis test for this claim: The systolic blood pressure of men who run at least five miles each week varies less than does the systolic blood pressure of all men. Sample data: n = 100 randomly selected men who run at least five miles each week, sample mean = 108.4, and s = 20.3 (0.5 point). 18.    Determine the appropriate approach to conduct a hypothesis test for this claim: The mean sodium content of a 30 g serving of snack crackers is 2,200 mg. Sample data: n = 130 snack crackers, sample mean = 3,100 mg, and s = 570. The sample data appear to come from a normally distributed population (0.5 point). 19.    Describe a type I error in no more than 100 words (0.5 point). 20.    List two strategies that can minimize the likelihood of a type I error (0.5 point). 21.    Describe a type II error in no more than 100 words (0.5 point). 22.    List two strategies that can minimize the likelihood of a type II error (0.5 point). 23.    In a 250- to 350-word essay, compare type I and type II errors and explain the possible negative effects of each error type in the life sciences (2 points).

Team Assignment Confidence Intervals in the Life Sciences Presentation

Week 5 Individual Assignment Hypothesis Testing and Correlation Worksheet 1.    What is a hypothesis? What is a hypothesis test (0.5 point)? 2.    What is a null hypothesis? What is an alternative hypothesis (0.5 point)? 3.    What is a test statistic (0.5 point)? 4.    What are significance levels (0.5 point)? 5.    Complete this table contrasting the traditional, p-value, and confidence interval methods of testing a claim about a proportion (1 point). 6.    What is the independent variable? What is the dependent variable? Why (0.5 point)? 7.    What is the null hypothesis? What is the alternative hypothesis? Is this a one-tailed or a two-tailed test (0.5 point)? 8.    What test statistic will you use? Why (0.5 point)? 9.    What is the critical value? What is the value of the test statistic (0.5 point)? 10.    Would you accept or reject the null hypothesis? Explain your conclusion in a 100- to 150-word summary (0.5 point). 11.    What is the null hypothesis? What is the alternative hypothesis? Is this a one-tailed or a two-tailed test (0.5 point)? 12.    What test statistic will you use? Why (0.5 point)? 13.    What is the critical value? What is the value of the test statistic (0.5 point)? 14.    Would you accept or reject the null hypothesis? Explain your conclusion in a 100- to 150-word summary (0.5 point). 15.    What is the F distribution? Describe it in no more than 100 words (0.5 point). 16.    How and when do researchers use the F distribution? Explain in no more than 150 words (0.5 point). 17.    What does it mean if F = 1.0251? Explain in no more than 150 words (0.5 point). 18.    Calculate r using Statdisk. Paste the Correlation and Regression report into your response. What is r (0.5 point)? 19.    Interpret r and r2. Explain whether there is a significant correlation between womens age and womens weight at the 0.05 significance level, and explain how much of the variation in womens weight is explained by its linear association with womens age (0.5 point).

STAT 167
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Excerpt from file: Confidence Intervals in the Life Sciences Presentation Names Statistics for the Life Sciences STAT/167 Date Fahad M. Gohar Conservation Biology of Bears Normal Distribution Standard normal distribution Confidence Interval Population Mean Population Variance Confidence Level Point Estimate

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Excerpt from file: Running head: Week 4 - Assignment - Performance Metrics 1 Week4AssignmentPerformanceMetrics BUS405:PrinciplesofInvestments Professor StudentName Date Running head: Week 4 - Assignment - Performance Metrics 2 CompleteProblem22intheQuestionsandProblemssectionofChapter13(shownbelow).

Filename: BUS 405 Week 4 DQ1 Expected Returns and Deviation.doc

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