A travel agent wants to determine how much the average client is willing to pay for a weekend at an all-expense paid resort. The agent surveys 30 clients and finds that the average willingness to pay is $2,500 with a standard deviation of $840. However, the travel agent is not satisfied and wants to be 95% confident that the sample mean falls within $150 of the true average. What is the minimum number of clients the travel agent should survey

So the answer for this case would be n=12 rounded up to the next integer

Explanation:

represent the sample mean

population mean (variable of interest)

s=840 represent the sample standard deviation

n represent the sample size  

The margin of error is given by this formula:

   (a)

And on this case we have that ME =150 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

  (b)

The critical value for 95% of confidence interval, the significance level if 5% and the critical value would be , replacing into formula (b) we got:

So the answer for this case would be n=12 rounded up to the next integer

the first successful, urban blues recording, selling more than 75,000 copies, was made in year 1920.

mamie smith recorded the first commercially successful example of the urban blues,   with the recording of “crazy blues”."crazy blues" was recorded on august 10, 1920, in new york city. within a month of the release of “crazy blues” it had sold 75,000 copies.

answer; empowerment and collaboration;