Lesson 5 Lab

startcode05.ipynb

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   "source": [
    "# Lesson 5 - Independent Practice - HOMEWORK"
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   "source": [
    "### For this exercise, we are going to take a look at several studies and outputs in order to get comfortable reading outputs and practicing hypothesis testing."
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   "source": [
    "## Data output 1\n",
    "This dataset examines the association between an outcome and generic variables x1, x2, x3\n",
    "<img src='../../assets/images/generic-output.png'>"
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   "source": [
    "#### Question 1.1 X6 has an association with the outcome of -0.2. Is this finding statistically significant? "
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   "source": [
    "Answer: No. P value is larger than 0.05; confidence interval include zero which it should never includes zeros."
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   "source": [
    "#### Question 1.2 Which of the variables X1, X3, and X6 have a statistically significant finding? "
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   "source": [
    "Answer: X1"
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   "source": [
    "#### Question 1.3 What does a 95% CI of 0.38-0.866 indicate? "
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   "source": [
    "Answer: This range is within the 95% confidence interval."
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   "source": [
    "## Data Output 2 \n",
    "This is a data set of different animals. We measured the brain size and body size of each animale in our data set. We aim to determine if there is an association between the body size and brain size of animals in our dataset."
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   "source": [
    "<img src=\"../../assets/images/body-size.png\">"
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   "source": [
    "#### Question 2.1 What is the outcome in this model? "
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   "source": [
    "Answer: Brain (the variable that we are predicting/what we are going to calculate)"
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   "source": [
    "#### Question 2.2 What is the predictor in this model? \n"
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   "source": [
    "Answer: Body"
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   "source": [
    "#### Question 2.3 What is the association body and brain size? \n"
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   "source": [
    "Answer: Brain = 0.9665 * body + 91.0044"
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   "source": [
    "#### Question 2.4 Is this relationship statistically significant? How did you decide?"
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   "source": [
    "Answer: Yes, the P-value is tiny (less than 0.05).\n",
    "\n",
    "(Kurtosis is huge)"
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   "source": [
    "#### Question 2.5 Is this relationship biologically significant? What other information would you need to decide this?\n"
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   "source": [
    "Answer: No. Because in this case, we need a true zero. Coz nobody, no brain. So we cannot have intercept in this case."
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   "source": [
    "## Data Set 3: A study about french fries and diabetes\n",
    "Take a look at the abstract"
   ]
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   "source": [
    "<img src=\"../../assets/images/fry-abstract.png\">"
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   "source": [
    "### Table 1 - Review Table 1"
   ]
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   "source": [
    "<img src='../../assets/images/fry-table1.png'>"
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   "source": [
    "#### Question 3.1 Is there a statistically significant diffence by age among the different levels of fries or potato intake?"
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   "source": [
    "Answer: answer is in the footnote. No."
   ]
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   "source": [
    "<img src=\"../../assets/images/fry-table2.png\">"
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   "source": [
    "#### Question 3.2 What are the numbers in the parentheses?"
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   "source": [
    "Answer: it has 95% of confidence Interval"
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   "source": [
    "#### Question 3.3 Is the risk of diabetes statistically significant for women who eat the highest mean servings of potatos (quintile 5) compared to the lowest group (quintile 1)?"
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   "source": [
    "Answer: Yes it is significant because it-quintile1 is outside the 0.05 range."
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   "source": [
    "#### Question 3.4 Is the risk of diabetes statistically significant for women who eat the second lowest mean servings of potatos (quintile 2) compared to the lowest group (quintile 1)?"
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   "source": [
    "Answer: No, there is no statistically significance. Because my confidence interval includes the baseline."
   ]
  }
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