# Practice Problems

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- A researcher studied the change of the depressive symptoms over time among 15 patents Hint: The concern of statistics is data collection and evaluation so as to draw conclusions. Data analysis..
- A researcher wanted to investigate the performance of high school students in a foreign language. Hint: A) Null hypothesis, ho: there is no significant difference in the mean performance in english exam b..
- A researcher wants to investigate whether there is any difference in the average number of hours Hint: Statistics1)hO: the average number of hours worked by Group A is NOT significantly different from th..
- A researcher wants to study the average lifetime of a certain brand of rechargeable batteries in hours Hint: a)Beta or type II error is the probability of fail to reject the null hypothesisP(type II error) = P..
- A Risk Management Plan (RMP) is developed to ensure levels of risk and uncertainty are properly managed within organizations Hint: "Risks that affect a project or product can affect economic performance, reputation, environmental, ..
- A rural community in Queensland was estimated to have a population Hint: StatisticsAlso denotes as case fatality ratio, the case fatality rate is a propotion of individual d..
- A salesperson working for BODGY and based in Barcelona needs to visit all the major cities in Europe Hint: Management "TSP, the travelling salesman problem usually asks the question which is ' What is t..
- A sample of 100 YSU students is asked whether they using the newly established Wellness Center Hint: The observed frequencies are given in the table of cross tabulation. From the second table of the ou..
- A sample of eight observations of variables x (years of experience) and y (salary in $1,000s) is shown below Hint: XiYi(Xi-Xbar)^2(Yi-Ybar)^2(Xi-Xbar)*(Yi-Ybar) 5200.252.25-0.75 3236.2520.25-11.25 715..
- A sample outline business case from a previous student (for a different type of project) is included to help you visualise a layout Hint: Business case- an analysis of a business resources,value, cost, feasibility, risks towards the proje..
- A school club surveyed 67 of its members about who they were going to root for in the Superbowl Hint: StatisticsRams AND Saints = 20Rams only = 7Rams AND Saints but NOT patriots = 5Rams AND Saints AND P..
- A set can be a collection of any type of object ranging from people to places to things Hint: Mathematics Study helpSet theory is a mathematical logic that deals with sets, which are often ..
- A set of piston rings weighing 120 g was irradiated with neutrons from a nuclear reactor Hint: Engineering..
- A single case of mad cow disease was confirmed in northern Alberta, Canada, May 20th of 2003 Hint: Negative Supply and demand shock is the occurrence of unplanned events that lead to decrease of supp..
- A single sampling plan is required for which producer’s risk of rejection Hint: "Part BThe Average Outgoing Quality curve gives the average outgoing quality as a function of the in..