Mathematics, 31.10.2021 03:10 Tariah5970
On the planet of Mercury, 4-year-olds average 2.8 hours a day unsupervised. Most of the
unsupervised children live in rural areas, considered safe. Suppose that the standard deviation is 1.4
hours and the amount of time spent alone is normally distributed. We randomly survey one Mercurian 4-year-old living in a rural area. We are interested in the amount of time X the child spends alone per day. (Source: San Jose Mercury News) Round all answers to 4 decimal places where possible.
a. What is the distribution of X? X-N( , )
b. Find the probability that the child spends less than 1.8 hours per day unsupervised.
c. What percent of the children spend over 2.5 hours per day unsupervised. [] %
Round to 2 decimal places)
d. 67% of all children spend at least how many hours per day unsupervised? hours. []
Answers: 1
Mathematics, 21.06.2019 18:30, princessbri02
Which of the following is the result of expanding
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Mathematics, 21.06.2019 21:20, madisontrosclair2
Amajor grocery store chain is trying to cut down on waste. currently, they get peaches from two different distributors, whole fruits and green grocer. out of a two large shipments, the manager randomly selects items from both suppliers and counts the number of items that are not sell-able due to bruising, disease or other problems. she then makes a confidence interval. is there a significant difference in the quality of the peaches between the two distributors? 95% ci for pw-pg: (0.064, 0.156)
Answers: 3
On the planet of Mercury, 4-year-olds average 2.8 hours a day unsupervised. Most of the
unsupervis...
Mathematics, 25.02.2021 17:50
Mathematics, 25.02.2021 17:50