How many miles does the car travel in 1.5 hours

Mathematics

2 answers:

Pavlova-9 [17]4 years ago

8 0

Unknown because speed is not listed.

SVEN [57.7K]4 years ago

8 0

Well that depends on how fast it is going. I'm going to start at 5 mph go by 5 until I get to 80 mph
5 mph= 7.5 miles
10 mph= 15 miles
15 mph= 22.5 miles
20 mph= 30 miles
25 mph= 37.5 miles
30 mph= 45 miles
35 mph= 52.5 miles
40 mph= 60 miles
45 mph= 67.5 miles
50 mph= 75 miles
55 mph= 82.5 miles
60 mph= 90 miles
65 mph= 97.5 miles
70 mph= 105 miles
75 mph= 112.5 miles
80 mph= 120 miles

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A forestry researcher wants to estimate the average height of trees in a forest near Atlanta, Georgia. She takes a random sample

marusya05 [52]

Answer:

The margin of error for her confdence interval is of 0.3757.

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 18 - 1 = 17

99% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 17 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.99}{2} = 0.995$ . So we have T = 2.8982