Sampling errors and errors due to selection bias B. Sampling errors only C. Errors due to interviewer bias and selection bias D. Only non-sampling errors 2) When every member of a population has the chance of being selected based on the probability, or frequency, of its representation in that population, you are using which type of sampling? A. Census sample B. Convenience sample C. Random sample D. Quota sample 3) A recent study of breast cancer revealed that 13% of the women in the sample used antibiotics more than 500 days in their lifetime. Further, 79% of these “heavy antibiotics users” developed breast cancer.
2. Explain how you tested your hypothesis. I took two stock cultures of paramecium and made samples into three test tubes. Alone in a tube for each one and then mixed for the 3rd. Then I tested every two days for 16 days for rate of growth.
* Question 1 2 out of 2 points | | | Probability trees are used only to compute conditional probabilities. Answer | | | | | Selected Answer: | False | Correct Answer: | False | | | | | * Question 2 2 out of 2 points | | | Seventy two percent of all observations fall within 1 standard deviation of the mean if the data is normally distributed. Answer | | | | | Selected Answer: | False | Correct Answer: | False | | | | | * Question 3 2 out of 2 points | | | If two events are not mutually exclusive, then P(A or B) = P(A) + P(B) Answer | | | | | Selected Answer: | False | Correct Answer: | False | | | | | * Question 4 2 out of 2 points | | | The maximin approach involves choosing the alternative with the highest or lowest payoff. Answer | | | | | Selected Answer: | False | Correct Answer: | False | | | | | * Question 5 2 out of 2 points | | | Both maximin and minimin criteria are optimistic. Answer | | | | | Selected Answer: | False | Correct Answer: | False | | | | | * Question 6 2 out of 2 points | | | The Hurwicz criterion is a compromise between the maximax and maximin criteria.
A Shapiro-Wilk test on the transformed data provides no evidence against the transformed data having come fro a normal distribution (P-value=0.4286). Statistical Inference We can estimate both the population mean and median incomes. The P-values from the t-tests are not sensible here: Executive Summary Our interest in these data was to estimate both the mean and median lifetime (in hours) of light bulbs in a warehouse. We estimate that the mean family income is between 1083 and 1122 hours, while the median family income is between 1074 and 1112
Sudden Infant Death Syndrome, or SIDS, is the third leading cause of death in babies (U.S. Department of Heath and Human Services). More babies die in a year of SIDS than cancer, leukemia, heart disease, cystic fibrosis, and child abuse combined (“Sudden Infant Death”). But what is SIDS? The definition is the death of an infant within its first year that cannot be explained after an autopsy, an investigation of the place where the baby died, and a review of the baby's and its family's medical history. But what truly causes it is a mystery that leaves scientists and doctors with just guesses and tests to do.
Van Ijzendoorn and Kroonenberg carried out a meta-analysis that collates and analyses data from many studies carried out by other researchers of 32 separate studies in eight different countries over 2000 babies using Ainsworth’s ‘Strange Situation’. To find out about attachments types in different cultures. Participants were then classified into three groups. Generally, Type B (secure attachment) was most common, with Type C least common (the standard pattern). Type C was more common in Israel, China and Japan.
During the first three years of life, humans transition from complete physical dependence to independence with a majority of basic self-help and mobility skills. While the exact timeline differs from child to child, there is a general order and window of time in which motor milestones are achieved. If you have any concerns about a child in your life, discuss them with the child's physician. Birth to 3 Months Motor control develops from the head, moves down through the arms and the trunk and then to the legs and feet, according to an item on early development on the online magazine Parenting. Initial movements are reflexive in nature, As the initial survival reflexes fade, motor skills are related to the growing ability to observe and interact with the environment.
Forecasting Methods Printup projected demand using three different forecasting approaches. The first forecasting method she suggests is to look at the number of overweight (BMI between 25 and 30) individuals in the United States and narrowing down that population to those who were actively trying to lose weight. According to the CPS study, that population was 35%, which she thought should then be narrowed down to the 15% of those who were comfortable with weight-loss drugs. From Printup’s experience, she believed that Metabical was likely to capture 10% of those individuals in the first year, and she could expect an additional 5% for the next three years, up to 30% by the fifth year. The pro for this forecast method is that it would be targeting both men and women and yet it would target a very specific market.
Micro preemie, as defined by Dr. Jean Wright, is a colloquial term that has been coined to describe babies born from 23 to 28 weeks with a low birth weight.Although they are a minority of the infants in a neonatal intensive care unit, this description defines them as a sub category of the premature babies born. I am an example of a micro preemie because I was born at twenty-five weeks gestation and weighed one pound fourteen ounces.Due to the baby doe regulations issued by the Department of Health and Human Services, all micro preemies are given life sustaining treatment such as a respirator and an insulated incubator to stay alive. When a micro preemie is born, doctors are often not able to make an assessment of a future disability; therefore, they revive all viable babies. One common problem (among several that a micro preemie might experience) is a brain hemorrhage. A brain hemorrhage is bleeding in the brain that can result in impairment.
Rudolfe Schaffer and Peggy Emerson (1964) studied sixty babies at monthly intervals for the first eighteen months of life; and a regular pattern was identified in the development of attachment (Hardy, S. 1995). They discovered that attachment developed in the following sequence:- Birth to six months - this is the indiscriminate attachment phase, the newborn is predisposed to attach to any human; most babies respond equally to any caregiver. After four months - preference for certain people; infants learn to distinguish primary and secondary caregivers, but still except care from anyone. After seven months - special preference for a single attachment figure; the baby looks to particular people for security and comfort; they show fear of strangers and unhappiness when separated from a special person. After nine months – multiple attachment; the baby becomes increasingly independent and forms several attachments.