According to past reports 48% of employees own a car. In a random sample of 250 employees, how many employees are expected to own a car?
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According to past reports 48% of employees own a car.
In a random sample of 250 employees, how many employees are expected to own a car?
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- In a sample of 310 people, 186 completed only high school, 24 completed only some college, 93 completed a two-year or four-year college, and 7 attended graduate school. What proportion of the sample does not have a two-year or four-year college degree?In a health survey of 1020 adults in the US, 44% said that they wash their hands after riding public transportation (based on data from KRC Research,http://www.krcresearch.com).a. What is the population of interest?b. What is the sample?c. Is the value 44% a parameter or statistic?In 1955, Life Magazine reported that a 25-year-old mother of three worked (on average) an 80 hour week. Recently, many groups have been studying whether or not the women's movement has, in fact, resulted in an increase in the average work week for women (combining employment and at-home work). Suppose a study was done to determine if the average work week has increased. 67 women were surveyed with the following results. The sample average was 83; the sample standard deviation was 10. Does it appear that the average work week has increased for women at the 5% level? State the distribution to use for the test.Construct a 95% confidence interval for the true mean. Sketch the graph of the situation.What is the p-value?
- In 2014, what ratio of construction worker injuries resulted in death?a.1 out of 5Correctb.1 out of 50Incorrectc.1 out of 100Incorrectd.1 out of 1,000From the given scenario, define the population proportion. In 2019, a national survey organization asked the question "Do you go on more than two vacations per year?" to a random sample of 2,000 Americans. 580 responded "Yes", while the other 1,420 people responded "No". Group of answer choices: A) the proportions of the sampled Americans who go on more than two vacations per year B) the proportion of all Americans who go on more than two vacations per year C) the 1,420 people who responded "No" D) the 2,000 AmericansThe probability that a house in an urban area will be burglarized is 5%. If 20 houses are randomly selected, what is the mean of the number of houses burglarized? O A. 0.5 OB. 10 O C. 1 O D. 1.5 C
- According to a survey in a country, 18% of adults do not own a credit card. Suppose a simple random sample of 900 adults is obtained.Determine whether the underlined number is a statistic or a parameter. in a study of all 4622 professors at a college, it is found that 40% own a television.According to the National Center for Education Statistics, 43% of the college students work full time. A survey of 900 randomly selected college students is to be conducted. For such groups of 900, would it be unusual to get 735 college students who work fulltime?
- To collect data about the number of students in your high school who have a part time job, which of the following methods is most likely to lead to a sample that is the most representative of the students in your school? Interview all the girls in the school. Ask the principal. Interview all the students in 9th grade. Assign each student in the school a number and randomly select students to be interviewed. Interview all the students who are on the sports teams in the school.A researcher is curious about the average monthly car insurance bill for high school students in the state of Flordia. If this average could be obtained, it would be an example ____. a. statistic b. population c. parmeter d. sampleFrom the given scenario, define the population proportion. In 2019, a national survey organization asked the question "Do you go on more than two vacations per year?" to a random sample of 2,000 Americans. 580 responded "Yes", while the other 1,420 people responded "No". Group of answer choices: A) the proportions of the sampled Americans who go on more than two vacations per year B) the proportion of all Americans who go on more than two vacations per year C) the 1,420 people who responded "No" D) the 2,000 Americans
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