Author: Anonymous

Patient: Name: David Thompson Age: 46 years Sex: Male Weight: 90 kg (198 lbs) Occupation: Sales Manager Chief Complaint:“I vomited blood twice after a night of drinking and feel weak.”History of Present Illness:Mr. Thompson reports several episodes of forceful vomiting after drinking heavily at a party. He noticed bright red blood in the vomit this morning. He feels dizzy when standing and mildly short of breath. No prior history of GI bleed or ulcers.Past Medical History: GERD (on omeprazole 20 mg daily) Hypertension Occasional alcohol use (binges on weekends) Vital Signs: Temp: 98.6°F (37°C) HR: 112 bpm BP: 94/60 mmHg RR: 22/min SpO₂: 96% RA Physical Exam: Pale, anxious, diaphoretic Orthostatic hypotension Abdomen soft, mild epigastric tenderness No signs of cirrhosis (no jaundice, ascites, or spider angiomas) Which assessment finding are consistent with acute upper GI bleeding in this patient? Select all that apply.

You run a 1-sided hypothesis test to test whether the population mean is greater than the null hypothesis of 5. You find that the sample mean is equal to 5.5 and calculate a p-value of .025. What does this tell us?

You want to perform a hypothesis test with a null hypothesis equal to 76. You know that the population standard deviation is equal to 10, and based on the sample size, the sample mean, and the chosen significance level, you fail to reject the null.   Now, consider a setting where you do not know the population standard deviation. Instead, you estimate the standard deviation to be 10. In this setting, given the same sample size, sample mean, and chosen significance level, which of the following is true?

You run the following hypothesis test. The significance level is 10%, the population standard deviation is 100, and the sample size is 64. If the actual population parameter was equal to 515, what is the probability of Type II error? (Round your answer to 4 decimal places.)   Type II Error:

A nutritionist wishes to compare resting heart rates between individuals who follow a vegetarian diet and those who follow a non-vegetarian diet. A sample of adults is selected at random. Each participant identifies their diet preference, and their resting heart rate is recorded in beats per minute. Use the summarized data below to determine if there is a difference in mean resting heart rate at the 0.05 significance level. Diet n mean standard deviation Vegetarian 38 77.33 7.23 Non-Vegetarian 72 79.08 6.75   State the hypotheses for this test.H0: [a1]Ha: [a2] State the decision rule.[dr] Determine the test statistic.[ts] Determine the p-value.[p] What conclusion should be made?At the 0.05 level, there [e1] significant evidence to claim there is a difference in the [e2] of vegetarians and non-vegetarians.

A wellness organization wants to determine whether individuals’ preferred time of day to exercise (morning, afternoon, or evening) is related to the primary reason of their motivation for working out. Participants complete a survey indicating both their preferred workout time and main motivation. Which type of test should be used for this scenario?

Is there a difference in college students’ GPA for STEM majors compared to Business majors? A random sample of 80 STEM majors and 80 Business majors reported their current cumulative GPA. The 95% confidence interval to estimate the mean difference (STEM – Business) in college students’ GPA was determined to be (-0.487, 0.832).  Does this scenario involve matched pairs or two independent samples?[a] Fully interpret the interval in context.With 95% confidence, it is estimated that the [b1] for [b2] college students that are STEM majors is between [b3] points [b4] and [b5] points [b6] than in the Spring semester. Does the interval support that the mean GPA for college students during the Fall semester is significantly different than in the Spring semester?[c]

A large farm is wants to test if there are any difference in corn production based on fertilizer type. The scientist compares a standard organic fertilizer, a new chemical fertilizer, and a slow-release granular fertilizer. Several plots of land of equal size and soil quality will be randomly assigned to receive one of the fertilizer types. The corn yield, measured in bushels per acre, for each plot will be recorded at the end of the harvest season and analyzed.

Round answers to three decimal places. A random sample of experienced drivers participated in a simulator study to assess reaction time under two different lighting conditions. Each driver completed the same driving course twice—once during simulated daylight and once during simulated nighttime conditions. For each participant, the order in which they experienced the conditions was randomly determined. The reaction time (in seconds) to unexpected obstacles for each person was recorded for each condition. The data is summarized below. Difference  n mean standard deviation daylight – nighttime 18 0.845 1.572   Determine the 95% confidence interval to estimate the mean difference in reactions times under the two conditions: ([lower], [upper]) What is the margin of error for your interval? [b]

A study was conducted to determine if there are any differences in daily water usage among households in various community types (rural, suburban, or urban). 100 households were randomly selected from each community type. Each household reported the typical amount of water used per day (in gallons). What is the explanatory variable for this study?[a] What is the response variable for this study?[b] What hypotheses should be tested?H0: [c1]Ha: [c2] What test statistic is needed for this test? [d] The p-value associated with this test is 0.0386. What decision should be made at the 0.01 level?[e] **You will type your conclusion for this problem in the next question.**