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Sauron [17]
3 years ago
5

I need help por favor gracias

Mathematics
2 answers:
tekilochka [14]3 years ago
8 0

Answer:

3.40

Step-by-step explanation:

2.89 divided by 85 gives 0.034 times by 100 gives 3.40

Alchen [17]3 years ago
5 0
The answer to the question

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According to a 2014 research study of national student engagement in the U.S., the average college student spends 17 hours per w
Nadusha1986 [10]

Answer:

Step-by-step explanation:

We would set up the hypothesis test. This is a test of a single population mean since we are dealing with mean

For the null hypothesis,

µ = 17

For the alternative hypothesis,

µ < 17

This is a left tailed test.

Since the population standard deviation is not given, the distribution is a student's t.

Since n = 80,

Degrees of freedom, df = n - 1 = 80 - 1 = 79

t = (x - µ)/(s/√n)

Where

x = sample mean = 15.6

µ = population mean = 17

s = samples standard deviation = 4.5

t = (15.6 - 17)/(4.5/√80) = - 2.78

We would determine the p value using the t test calculator. It becomes

p = 0.0034

Since alpha, 0.05 > than the p value, 0.0043, then we would reject the null hypothesis.

The data supports the professor’s claim. The average number of hours per week spent studying for students at her college is less than 17 hours per week.

4 0
3 years ago
Denver has a current temperature of -5°, while Barcelona has a current temperature of 54°. What is the difference in temperature
irga5000 [103]

Answer:

59°

Step-by-step explanation:

Difference=54-(-5)

=54+5=59

7 0
2 years ago
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Add 8x to 2x and then subtract 5 from the sum. If x is a
Anuta_ua [19.1K]

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Step-by-step explanation:

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