Past experience indicates that an average number of 6 customers per hour stop for gasoline at a gasoline pump. What is the probability of (a) three customers stopping in any hour? (b) Three customers or less in any
The research problem is stated the sixth paragraph of the study. The study presents the article’s statement of purpose. The study uses pre-existing groups because the workers are randomly assigned and not shuffled to engage within different sites.
In deed, my grasp of the content taught fascinated me.
Overall, the course was very interesting. I found it motivating using the statistics disc to analyze data. My favorites were the MSL assignments, hypothesis testing, descriptive
Similarly, Johnson joined the AC/DC rock band in 1980 to replace Scott. Johnson featured as the main vocalist in nine albums produced even into the 1900s. The Scott versus Johnson competition to establish the best rock vocalist reveals that
The three major measures of central tendency include the mean, mode and the median which describe a completely different indication of a central value in the distribution.
Theft is the common crime in my community. The data of theft cases varies from time to time
3. An education expert is researching teaching methods and wishes to interview teachers from a particular school district. She randomly selects ten schools from the district and interviews all of the teachers at the selected schools. Does this
In different parts of the country, advertisements are placed with either the local TV or a local radio station. The length of the advertisements is characterized as short, medium or long. Each combination of media and
Hence, correlation alone is not causality, but can be considered as a determining factor. (Verma and Pearl, 1990)
According to Statistical Assessment Service (2012) under the sponsorship of George Mason University, “In general, we should all be wary of
But, how does a consumer know which one contains the lowest calorie among so many brands? That is why this assignment focuses on statistical evaluation of calories of breakfast cereals. This analysis will help a consumer to
There is 95% confidence that the number of employees average is between 22.24 and 31.36.
The data consisted of ten points and was normally distributed. The lowest reported crime rate was 1.35 and the highest reported rate was 4.15. average crime
at +1, a coefficient variance of 0.75 indicates that there is a positive and strong linear-relationship between the credit balance and size of the holding.
A coefficient of determination (r2) normally explains the portion of fluctuation (variance) of a particular variable
This can be a threat to external validity in case when the participants of the experiment are aware of the experiment as compared to the situation where participants are not aware of the same. The results might have been different.
The major difference between the
Q6. Answer: d) Randomized controlled clinical trial It provides better evidence than the case control study or screening or cohort study because it provides causal effects inference than the other three approaches.
Q11. Answer: The most likely food that
A researcher asks whether attending a private high school leads to higher or lower performance on a test of social skills when compared to students attending public schools. A sample of 100 students from a private school produces a mean score of 71.30. The population mean (μ) for students from public high schools is 75.62.
There are numerous statistical methods available for forecasting and deciding on the significance of various scenarios. We consider the three techniques of hypothesis testing, parametric analysis and multivariate. These three are most of the time used together since they are just the components of probability analysis.
, The Bay Area Athletic Club can only expand the membership base other than increase the monthly rate in order to generate extra revenue (Somrack, 2005).The recommendations to the management of the club on to increase revenue collection include:
The management of the club
e selected group or sample, external validity refers to the degree to which the findings can be inferred to other settings such as a wider population or similar settings. An example of threat to validity is the “historical effect” confounds that affects an experiment
From these ANOVA table above, one can conclude that MS (ERROR) and MS (B) differ significantly because P-value=0.000000697 which is a figure less than alpha value of 0.05. Thus the null hypothesis can be rejected. Moreover, the table shows
Do you think the sample would have been randomly selected from this target population? Explain your answer. Yes. Every person in the city has an equal chance of being selected.As a result the random sampling will not be biased (Sweeney, et al., 2011, pp. 142-145)
Other variables that might be associated with number of accidents include over speeding, driving under the influence of alcohol and other drugs as well as reckless driving. While rain is a natural factor, these other factors are caused by human initiatives. Driving while
Similarly, students need to reach class in time and conveniently and this identifies need to understand the most appropriate types of transport. People’s opinions on available types of transport offers an insight into effectiveness, efficiency, and convenience of
e three types of presentation, “Any test presentation” was coded as 1, Technical Literature Review was coded as 2 and presentation on International business was coded as 3. The presenters were also coded such that 1 denoted male and 2 denoted female. On that note, this paper
If the process were repeated many times, each time selecting random samples of 500 people aged 20-24 and 450 people aged 25-29 and each time constructing a confidence interval for p1 - p2, 95% of the time the true difference between the two population proportions will lie
In the survey, 48 domestic (mean = 5.7708, standard deviation = 2.2993) and 169 international students (mean = 4.6923, standard deviation = 2.6748) responded to item five of the survey. This indicates that the international students’ response was a little lower than that
The researcher will select 20 nurses randomly out of the 75 nurses in the hospital; there is no method of selecting the nurses (Kothari, 2012).
This is where a researcher divides the entire population into
Despite being associated with several challenges, including fear of insecurity of personal data and theft of information leading to stealing of money. Nonetheless, uptake of the cashless payment system has been tremendous. The impacts of specific aspects (that could stand