Question

an article reported on a long - term study of the effects of hurricanes on tropical streams of a forest. the study shows that a hurricane had a significant impact on stream wa shows a sample of 10 ammonia fluxes in the first year after the hurricane. data are in kilograms per hectare per year. complete parts (a) through (c) below.
91 75 144 144 171 117 56 56 89 158

a. find the mean.
the mean is 110.1.
(type an integer or decimal rounded to one decimal place as needed.)

b. find the median.
the median is 104.0.
(type an integer or decimal rounded to one decimal place as needed.)

c. find the mode(s). select the correct choice below and, if necessary, fill in the answer box within your choice.
a. the mode(s) is(are)
(use a comma to separate answers as needed.)
b. there is no mode.

Explanation:

Part (c)

Step1: Recall the definition of mode

The mode is the value(s) that appear most frequently in a data set.

Step2: Count the frequency of each data point

• Data points: 91, 75, 144, 144, 171, 117, 56, 56, 89, 158
• Frequency of 56: 2 (appears twice)
• Frequency of 144: 2 (appears twice)
• All other data points (91, 75, 171, 117, 89, 158) appear once.

Since both 56 and 144 appear with the highest frequency (2 times), they are the modes.

Answer:

A. The mode(s) is(are) 56, 144.