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AnnoyCo, a large consumer products firm, has recently introduced a new product. As part of the launch, 25% of the customers in the company's database received calls from AnnoyCo's telemarketers.
It is now one year after the launch of the product. 40% of the customers in the company's database have purchased the product.
A recent survey by the company's marketing department has determined that among customers who have bought the product, one of eight were called.
(a) What is the probability that a customer chosen at random from the company's data base has bought the product?
(b) What is the probability that this customer was called and bought the product?
(c) Given that the customer was called, what is the probability he or she bought the product?
(d) Did telemarketing help the company's sales? Explain in a sentence or two.
Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?
Graph one shows a number of observations that are very spread out but generally trending from the top left of the graph to the bottom right.
ExxonMobil's required return for equity, re is 14%. Its required return for debt, rd is 8%, its debt-to-total-value ratio L, is 35%, and its marginal tax rate, T is 40%, calculate its (adjusted WACC)?
State appropriate null and alternative hypotheses. Report the test statistic, its degrees of freedom, and the P-value. What do you conclude?
A jar contains 2 black marbles and 8 white marbles. If you randomly pick 2 marbles without replacement, what is the probability that you get one marble of each color?
A quality control engineer selects a part to be tested. The part is then declared acceptable, repairable, or scrapped. Then another part is tested. List all the possible outcomed of this experiment.
School seniors in his random sample, 159 believe that "getting rich" is an important goal. Can he conclude, at the 0.05 level of significance, that the proportion has indeed changed?
A nationwide test taken by high school sophomores and juniors has three sections, each scored on a scale of 20 to 80. In a recent year, the national mean score for the writing section was 47.2 , with a standard deviation of 10.2.
Conditional and compound probabilities.The table below gives the distribution of blood types by gender in a group of 1000 individuals.
State the null hypothesis and the alternate hypothesis. State the decision regarding the null hypothesis.
Bring to mind a research question that interests you, or a current event that utilizes statistics to present results, that you can use as an example for this discussion. State the research question or the current event and results.
A firm plans to hire 100 employees during the year. It expects that 25 of these employees will obtain graduate degrees within the next 5 years of being hired.
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