1. Harry is interested in whether owls fly at different speeds during the day and at night. He times how long it takes one group of 25 owls to fly between two set
locations during the day and he times a different group of 25 different owls
between the two locations at night.
a. What type of t-test will Harry use?
One sample
Independent samples
Paired-samples
b. Is the test:
One-tailed positive
One-tailed negative
Two-tailed

Is 8.50 an answer or no? ?

Answer: d. 39 cmin the diagram, the approximate length of the minor arc de is 39 centimetres.step-by-step explanation: the formula for the length of an arc in a circle is as displayed below.let the length of the minor arc de = xx = 2( pi )r × angle of sector / 360°from this, we will substitute the values given from the problem into the formula to obtain the length of the minor arc de.x = 2( pi )r × angle of sector / 360°r = radius = 25cmpi as an approximate value = 3.14angle of sector = 120°x = 2( 3.14 )( 25 ) × 120° / 360°x = 157 × 1 / 4x = 39.25x = 39 ( rounded to the nearest whole number as an approximate value )