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Question: Population and Sample are two important terms in the subject ‘Statistics'. In simple terms, population is the largest collection of items that we are interested to study, and the sample is a subset of a population. In other words, sample should represent the population with fewer but sufficient number of items. One population can have several samples with different sizes (Levy and Lemeshow, 2013). This researcher's study is on the social and professional lived experiences of African-American female faculty in community colleges in South, Texas. The research shows that this researcher only needs a small sample of 10-15 respondents to answer this researcher's questions. (target population is African-American female faculty in community colleges). This researcher chose this group because of their race, gender, job affiliation and geographical location. Kitchenham and Pfleeger, S. L. (2002) assert to obtain a sample; you must begin by defining a target population. The target population is the group or the individuals to whom the survey applies. In other words, you seek those groups or individuals who are in a position to answer the questions and to whom the results of the survey apply. Thus, a valid sample is a representative subset of the target population. This researcher plans to use 2 tables: (1) to illuminate the data revealing the correlation between professional job statuses achieved by African-American female faculty in academia, despite their degree attainment in the last 20 years, compared to their White male and female counterparts in academia. So, the descriptive statistics in this study will be gender, age range and race.
A recent study of 750 Internet users in Europe found that 35% of Internet users were women. What is the 95% confidence interval estimate for the true proportion of women in Europe who use the Internet?
for the following claim find the null and alternative hypothesis test statistic pvalue critical value and draw a
The MPG (Miles per Gallon) for a mid-size car is normally distributed with a mean of 32 and a standard deviation of .8. What is the probability that the MPG for a selected mid-size car would be less than 33.2.
Does lovastatin (a cholesterol-lowing drug) reduce the risk of heart attack? In a Texas study, researchers gave lovastatin to 2,325 people and an inactive substitute to 2,081 people (average age 58). After 5 years, 57 of the lovastatin group had s..
Bingo Hamburger Co has a chain of 12 stores in a large city. Sales figures and profits for the stores are given in the following table. Obtain a regression line for the data & predict profit for a store assuming sales of $10 million.
a kinesiologist would like to compare the left hand and right hand gripping strengths of left-handed individuals. a
an educator wants to estimate the mean number of hours elementary school children watch television per day. how large a
Indicate whether the appropriate test will be one-tail or two-tail, then sketch a diagram that shows the approximate location of the "rejection" region(s) for the test.
If 700 stolen cars are randomly selected, what is the mean and standard deviation of the number of cars recovered after being stolen?
1.Dave has $100,000 to invest in 10 mutual fund alternatives with the following restrictions. For diversification, no more than $25,000 can be invested in any one fund.
Suppose that among workers exposed to asbestos in a shipyard in 1980, 33 died over a 10 year period from COPD, whereas only 24 such deaths would be expected based on statewide mortality rates. Is the number of deaths from COPD in this group excess..
Identify the independent variable and its levels. Identify the dependent variable. State the null hypothesis in words.
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