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2 | The sample variance is _______. | ||
a | 8285.94 | ||
b | 9469.64 | ||
c | 10521.83 | ||
d | 11690.92 |
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- A researcher wants to study the behaviours of postgraduate students in Australia in mobile phone usage. One of the goals of the study is to find out the first app the students open every morning. The researcher collected a random sample of 1250 postgraduate students from 3 big universities in Sydney and asked them to fill in a questionnaire. Are the data collected by the researcher considered as primary or secondary data? ExplainAs the Country Director of a multi-national company in Ghana, you have decided to conduct a survey to determine the perception of Ghanaians about a new alcoholic beverage you have introduced into the market. Identify, justify your choice, and explain any three (3) sampling techniques that can be employed for such a survey. Discuss how you will use each technique to select sampling elements for the study. Clearly explain how you will collect the data.the unemployment rate for 18- to 34-year-olds was reported to be 10.8% (the Cincinnati Enquirer, november 6, 2012). assume that this report was based on a random sample of four hundred 18- to 34-year-olds. a. a political campaign manager wants to know if the sample results can be used to conclude that the unemployment rate for 18- to 34-years-olds is significantly higher than the unemployment rate for all adults. according to the bureau of labor Statistics, the unemployment rate for all adults was 7.9%. develop a hypothesis test that can be used to see if the conclusion that the unemployment rate is higher for 18- to 34-year-olds can be supported.b. use the sample data collected for the 18- to 34-year-olds to compute the p-value for the hypothesis test in part (a). using a 5 .05, what is your conclusion?c. explain to the campaign manager what can be said about the observed level of significance for the hypothesis testing results using the p-value
- 7. A television station wishes to study the relationship between viewership of its 11 p.m. news program and viewer age (18 years or less, 19 to 35, 36 to 54, 55 or older). A sample of 250 television viewers in each age group is randomly selected, and the number who watch the station’s 11 p.m. news is found for each sample. The results are given in the table below.An alumni coordinator is interested in studying the performance of CoE EM alumni.She clustered the identified respondent to regions in the Philippines, then randomlyselects five regions, and finally selects three medium-scale to large-scale miningcompanies for every region selected. With this she identified the Mining EngineerAlumni for interview. What sampling method does the coordinator used?You need to research about (Personal finance management) using a sample . Describe the steps to be taken in order to use the stratified sampling technique .
- The Struthers Wells Corporation employs more than 10,000 white-collar workers in its sales offices and manufacturing facilities in the United States, Europe, and Asia. A sample of 300 U.S. workers revealed 120 would accept a transfer to a location outside the United States. On the basis of these findings, write a brief memo to Ms. Wanda Carter, Vice President of Human Services, regarding all white-collar workers in the firm and their willingness to relocate. As a result of these sample findings, we can conclude that what percentage of the white-collar workers would transfer outside the U.S.?Read the executive summary thoroughly and attempt the questions given below:The prevailing of fast food consumption and obesity in Iranian student is high. Fast food consumptionwas associate with abdominal obesity based on WHR, but did not has related to general obesity basedon BMI. In an analytical cross-sectional study, 300 students were selected random from the twolargest universities in Qom, center of Iran, studying in medical and basic sciences fields in 2015. Isuccessfully collected the data by a modified version of NELSON’S fast food questionnaire andanthropometric measures including Waist-Hip Ratio (WHR) and Body Mass Index (BMI). Chi-square,independent t-test, and multivariate logistic regression were used for statistical analysis. I want toestimate the prevalence of fast food consumption and to assess its association with abdominal andgeneral obesity. My results has shown that, 72.4% (67.4% in females vs 80.7% in males) had at leastone type of fast food consumption in the…A manufacturer of cat food was planning to survey households in the US to determine purchasing habits of cat owners. Among the questions to be included are those that relate to Where cat fat is primarily purchased. Whether dry or moist cat food is purchased. The number of cats living in the household. Whether the cat is pedigreed. Describe the population. For each of the four items listed, indicate whether the variable is categorical or numerical.
- The gym teacher wants to know how many students attend games. She asks 80 students throughout the day. What is the sample?Please solve question 7 using the data from question 5.10.61 The per-store daily customer count (i.e., the mean number of customers in a store in one day) for a nationwide convenience store chain that operates nearly 10,000 stores has been steady, at 900, for some time. To increase the customer count, the chain is considering cutting prices for coffee beverages. The question to be determined is how much to cut prices to increase the daily customer count without reducing the gross margin on coffee sales too much. You decide to carry out an experiment in a sample of 24 stores where customer counts have been running almost exactly at the national average of 900. In 6 of the stores, the price of a small coffee will now be $0.59, in 6 stores the price of a small coffee will now be $0.69, in 6 stores, the price of a small coffee will now be $0.79, and in 6 stores, the price of a small coffee will now be $0.89. After four weeks of selling the coffee at the new price, the daily customer count in the stores was recorded and stored in . At the 0.05…