Question
For problems 4 - 9, use the following information. A 2019 study by the Pew Research Center found that 63% Instagram users visit the site
For problems 4 - 9, use the following information.
A 2019 study by the Pew Research Center found that 63% Instagram users visit the site or app on a daily basis. Suppose we take a random sample of eight Instagram users. Let X = number of users who visited Instagram that day. Find the following probabilities:
4) (27 points) Construct a Probability Distribution Table. Round all probabilities to 4 decimal places.
I encourage you to use technology like your calculator, Excel, or a website to build your probability table.
Use your table from #4 to find the following probabilities.
5)(1 point) (=7)
6)(2 points) (8)
7)(4 points) (35)
8)(4 points) (>4)
9)(2 points) (2<<4)
Use the following information for problems 10 - 13.
The Bronx Zoo reported that the mean wingspan of their Monarch Butterflies is 7.8 cm. Assume that the distribution of wingspan stays normal, with a standard deviation of 0.7 cm.
Sketch the normal (bell) curve for each problem and show each calculation.
10) (4 points) Find the probability that a randomly selected Monarch Butterfly has a wingspan less than 7 cm.
11) (5 points) Find the probability that a randomly selected Monarch Butterfly has a wingspan greater than 8 cm.
12) (6 points) Find the probability that a randomly selected Monarch Butterfly has a wingspan between 6.6 and 8.2 cm.
13) (1 point) Find the 50th percentile of the wingspan of Monarch Butterflies at the Bronx Zoo.
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