Beryllium disease: Beryllium is an extremely lightweight metal that is used in many industries, such as aerospace and electronics. Long-term exposure to beryllium can cause people to become sensitized. Once an individual is sensitized, continued exposure can result in chronic beryllium disease, which involves scarring of the lungs. In a study of the effects of exposure to beryllium, workers were categorized by their duration of exposure (in years) and by their disease status (diseased, sensitized, or normal). The results were as follows:     Duration of Exposure   <1 1  to  <5 ≥5 Diseased 12 14 23 Sensitized 12 18 12 Normal 64 130 205   Test the hypothesis of independence. Use the =α0.01 level of significance and the P-value method with the TI-84 Plus calculator. What do you conclude?   Find P value

5. In the table below, compute age-specific mortality rates per 1,000 for Populations A & B in Table 1. (Hint: Decimal to at least the tenth.) 45 years Age-Specific Mortality Rate, per 1,000 Population A Age-Specific Mortality Rate, per 1,000 Population B

Beryllium disease: Beryllium is an extremely lightweight metal that is used in many industries, such as aerospace and electronics. Long-term exposure to beryllium can cause people to become sensitized. Once an individual is sensitized, continued exposure can result in chronic beryllium disease, which involves scarring of the lungs. In a study of the effects of exposure to beryllium, workers were categorized by their duration of exposure (in years) and by their disease status (diseased, sensitized, or normal). The results were as follows: Duration of Exposure 5 Diseased 15 7. 19 Sensitized 12 22 14 Normal 66 145 197 Send data to Excel Test the hypothesis of independence. Use the a = 0.10 level of significance and the P-value method with the TI-84 Plus calculator. What do you conclude?

adapted from Safe and Healthy Travel to a Mass GatheringCenters for Disease Control and Prevention      International events draw huge crowds and come with unique risks to travelers. Whether they are planned years in advance, such as the Olympics, or happen more spontaneously, such as a president's memorial service, mass gatherings present several problems. They are associated with crowding at venues, poor hygiene from temporary food and sanitation facilities, and challenging security situations. The risk of infectious diseases increases because of crowded conditions and the influx of attendees from around the world.     A mass gathering can be thought of as any gathering of people that is large enough to strain local resources. Typically, they involve a large number of people—sometimes numbering in the millions—at a specific location, for a specific purpose, and for a defined time frame. 16   Select the correct location on the image. Which flash card correctly explains…

In an article in the Journal of Marketing, Bayus studied the differences between "early replacement buyers" and "late replacement buyers" in making consumer durable good replacement purchases. Early replacement buyers are consumers who replace a product during the early part of its lifetime, while late replacement buyers make replacement purchases late in the product's lifetime. In particular, Bayus studied automobile replacement purchases. Consumers who traded in cars with ages of zero to three years and mileages of no more than 35,000 miles were classified as early replacement buyers. Consumers who traded in cars with ages of seven or more years and mileages of more than 73,000 miles were classified as late replacement buyers. Bayus compared the two groups of buyers with respect to demographic variables such as income, education, age, and so forth. He also compared the two groups with respect to the amount of search activity in the replacement purchase process. Variables compared…

2. Iconic memory is a type of memory that holds visual information for about half a second (0.5 second). To demonstrate this type of memory, participants were shown three rows of four letters for 50 milliseconds. They were then asked to recall as many letters as possible, with a 0-, 0.5-, or 1.0-second delay before responding. Researchers hypothesized that longer delays would result in poorer recall. The number of letters correctly recalled is given in the table for this between-subjects designs. G=114 ΣΧ2 = 878 N=18 0 12 11 6 10 8 7 T = 54 M=9 SS=28 Delay Before Recall (in seconds) 0.5 8 4 10 6 3 5 T = 36 M = 6 SS = 34 1.0 4 b. Compute eta-squared to measure the effect size. WOH 4 2 5 7 2 T=24 M=4 SS = 18 a. Do the data indicate that delay to recall had a significant impact on number of words recalled? Use the hypothesis testing steps & alpha = .05. Compute any necessary post-hoc tests.

You conduct a survey of current exposure to organochlorine pesticides and pregnancy status among 500 fertility patients at a fertility center following them from 2015-2017.  Half of those patients are pregnant at the time of survey.  Of those who are pregnant, 63 reported using OCPs in their gardens in the last year while they were trying to conceive.   Among those who are not pregnant at the time of survey, 40% reported using OCPs in their gardens in the last year while they were trying to conceive.  Assume minimal loss to follow-up and no competing risks.  a.  Which study design is described above? Case-control study Closed cohort study Open cohort study Cross-sectional study Ecologic study None of the above B. Draw a 2x2 table based on the description above. Identify and label the exposure and the outcome. Be sure to include any appropriate totals based on the respective study design.