A researcher wants to investigate the number of hours high school students spend doing homework each night. After surveying 1,200 high school students, the researcher makes the claim that she is 95% confident that the number of hours students spend doing homework each night is between 0.6 and 2.8 hours. What is the mean and margin of error for this confidence interval?

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2.1± standard deviation results in a 95% confidence interval. ... A researcher wants to investigate the number of hours high school students spend ... After surveying 1,200 high school students, the researcher makes the claim that she is 95% confident that the number of hours students spend doing homework each.

Step-by-step explanation:

$4

step-by-step explanation:

$30×5=$150

$150 minus $130=$20

$20÷5=$4.

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b is 38 degrees.

a is 52 degrees.

this is because if b is 38 and a is 14 degrees more than b than 38+14=52 and 52+38=90 degrees. hope this .