A major challenge in designing marketing communications is being able to grab the attention of the target audience in a crowded media field. Which of the following factor(s) contribute to creating this challenge?

a. Fragmentation of mass media
b. Proliferation of alternative ways to reach consumers
c. Increasing skepticism of consumers in receiving marketers' messages
d. Desire of consumers to co-create the meaning of brands
e. All of the answers are correct

The average u.s. household has $178,600 in life insurance. the standard deviation is $25,500. a local insurance agent would like to see how households in his city compare to the national average, and selects a simple random sample of 30 households from the city. for the households in the city, the average amount of life insurance is $188,800. a. based on the sample results, construct a 95% confidence interval for the true average amount of life insurance for households in the city. b. test the h0 : $178,600 ? ? to determine if the city's sample average is significantly different from the u.s. average amount of life insurance per household. use the conventional levels of significance.