Statistics

Statistics

Just answer these questions

1-    Build the 90% confidence interval of, it is know that, from a random sample of 9 people, the mean length of time it take to complete the course is, 109 seconds, with a standard deviation of, 23 seconds?

2-    NeliCavuto, a Fox News show host said, a recent poll is incorrect, in a recent election. He said, the poll said that, candidate A (name with held) “would receive 52% of the vote.” The election was held and candidate a lost with 48% of the vote. Thus, Cavuto concluded, “the poll was incorrect.” Cavuto did not say anything about the margin of error in the poll, which was 5%. Was Canvto’s summary misleading to his viewers? Use statistical ideas to justify your answer, one-way or other. I don’t care if you thing Fox os truth or a complete lie, in here we use statistics to support our ideas and not ideology.

3-

Rate of return%

Scenario     Probability     Auto stock     Gold stock     Portfollo Return %

Recession     1/3    -8    +20    -1.0

Normal     1/3    +5    +3    +4.5

Boom    1/3    +18    -20    +8.5

Expected return         5    1    4

Variance         112.7    268.7    15.2

Standard deviation         10.6    16.4    3.9

Portfollo return = (.75 * auto stock return) + (.25 * gold stock return)

During question 3 from where we get Standard deviation or how we get Standard deviation?

Place this order with us and get 18% discount now! to earn your discount enter this code: special18  If you need assistance chat with us now by clicking the live chat button.