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RC Cola claims that 20 percent of the population can identify its products. in efforts to boost their identity, RC cola employs a famous spokesperson to advertise. a survey is then taken to asses the results of the ad campaign. the results show that 21 percent of the 1000 respondents can identify RC Cola products. has the advertising campain made any difference in the product identity? use 0.05 significance level. a. state the null hypothesis HO: H1: B state the decision rule c. compute the value of the test statistic d. estimate the p value e. what is your decision regarding null hypothesis?
For both airlines, (recall you already collected data on one airline in Module 1 and an additional airline as part of this assignment), construct 95 percent confidence intervals (alpha would equal what in this case?) for monthly load factors, mont..
A manufacturer produces and sells chilled, ready-to-eat pasta salad in round lots of 50 serving units each. These items have a very limited shelf life; therefore, if items are made but not sold, they have no value.
what results in your departments seem to be correlated or related to other activities? how could you verify this?
The average hourly wage of employees of a certain company is $9.83. Assume the variable is normally distributed.
How many ships must be included in the sample if the CEO wants the error to be within 0.02 and a confidence level of 95% if: there is no information available that could be used as an estimate of the population proportion?
Make a point estimate of the population mean difference in endurance after taking the herbs. Make a 95% confidence interval estimate of the population mean difference.
A Firm has two photocopying machines. The old one is available for use 80% of the time and the new one is available for use 91% of the time. The machine availabilities are independent of each other. a) Construct a tree diagram to display the infor..
Is seat belt use independent of cigarette smoking? A study of seat-belt users and non-users yielded the randomly selected sample data summarized in the table below.
Find the mean and median of the transformed heights and convert the mean and median of the transformed data back to the original units.
Consider strings of length 9 with elements being a, b or c. How many strings will contain at least 6 b a?
A small pilot study is being conducted to determine the association between maternal age and birth weight. First, from all the single births in 2009 at Hospital X with mothers aged ? 20 years, we randomly selected 15 records.
A normal probability plot shows a distinctly nonlinear pattern, primarily because of the single outlier on each end of the data. But a dotplot and boxplot exhibit a reasonable amount of symmetry.
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