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I need help with this problem, it is really important because if I fail this I will automatically fail the whole subject. Here it is:
The marketing research firm that conducted the survey provided HATCO's sales director with a
summary of the results.
Nevertheless, the sales director still has questions and asked the marketing firm to address them:
is the mean obtained from the survey compatible with the mean of the whole
population of customers to be, in fact, 65% or greater?
2. From available information regarding HATCO's main competitor, a corresponding survey to their
costumers showed a sample average of 48% with sample standard deviation of 10% for "Usage
level" (the sample size was 80). Is it reasonable to assume that the mean usage level is the same
for HATCO and this main competitor?
3. Another point of concern is the proportion of large vs small firms (variable X8 - Size of the firm).
From our previous knowledge, about 45% of the customers are large firms. Should we update that
figure?
4. Some of the perceptions present a low absolute value for the correlation coefficient with the
outcome X9 - Usage level. Does this mean that they really do not have any correlation with the
outcome?
