可唔可以同我改正以下d英文呀?thx

b/ population and sample size
We expect the population of this research constitutes a total of 120 to 160 respondents. The respondents are randomly selected which include the loyal customers of Pacific Coffee & non-clients of different sex or age groups.

c/ Questionnaires Design
About half of questions enquire about how the customers satisfy with the service. The remaining questions are focused on the most important factors that affect the buying behavior of customers.

d/ Data Analysis
After we collected information from primary data and secondary data, we need to analyze and evaluate the result. After then, we may have a clear picture about the issues for the Pacific Coffee. Based on the analysis result, we can adjust the strategies such as marketing mix, service level & environment, etc...

b/ population and sample size
It is expected that there shall be around 120 to 160 respondents.They will be selected randomly and among them will include people of different ages and sex, both regular and not-regular customers of Pacific Coffee

c/ Design of questionnaire
About half of the questions measure the satisfaction level of customers. About half of questions aim at finding out the most important factors affecting customers buying behaviour

d/ Data Analysis
After we collected information from primary data and secondary data, we need to analyze and evaluate the results. Than we understand the issues for the Pacific Coffee. According to there analysis (? don't know what you mean), we can improve strategies of Pacific Coffee (confusing!) such as marketing mix, service, location, environment.