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andrew11 [14]
3 years ago
15

g The average work week in Los Angeles was 40.1 hours in the first quarter of 2019. It is believed that the pandemic has led to

a reduction in the average work week. To test the validity of this belief, the hypotheses are
Mathematics
1 answer:
Gemiola [76]3 years ago
6 0

Answer:

b. Hо : μ ≥ 40.1; Ha : μ > 40.1

Step-by-step explanation:

Note: The complete options to the question is attached as picture below

The alternative hypothesis is focusing on <em>"the recession has led to a reduction in the average work week".</em>

<em>S</em>o, it will be less than the past average. i.e, 40.1.. so, we will use a less than (<) sign to write the alternative hypothesis.

<u>The hypotheses are as below:</u>

Hо : μ ≥ 40.1 (Null hypothesis)

Ha : μ > 40.1 (Alternative hypothesis)

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How many liters of a 10% antifreeze solution and a 40% antifreeze solution must be mixed to make 15 liters of a 25% solution? Ro
butalik [34]

Answer:

7.5 liters of a 10% antifreeze solution AND

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Step-by-step explanation:

According to the question,we were asked to find out how many liters of 10% anti freeze solution and 40% anti freeze each to make a 15 liters 25% mixture

Let’s call

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Since "X" was used to fill for the unknown amount of 10% anti freeze solution,we have 7.5 liters of the 10% solution and another 7.5 liters for the 40% solution to end up with 15 liters of the desired 25% solution.

8 0
3 years ago
Solve (x – 3)2 = 49. Select the values of x.
PIT_PIT [208]

Answer:

<h3>x = 27.5</h3>

Step-by-step explanation:

(x - 3)2 = 49 \\  \frac{(x - 3)2}{2}  =  \frac{49}{2}  \\ x - 3 = 24.5 \\ x - 3 + 3 = 24.5 + 3 \\ x = 27.5 \\

6 0
2 years ago
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Multiple samples of students were asked four questions, with the sampling variability of their answers to question 4 being the h
iogann1982 [59]
The variability measures the closeness of the individual data provided. So, the most reliable sampling is the one with the lowest variability. 

For this case, the question with the lowest sampling variability is question 3. Therefore, we can conclude that the answers to which of the questions are most reliable is question 3. 
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melamori03 [73]

Answer:

Step-by-step explanation:

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