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Y_Kistochka [10]

3 years ago

11

If used compensation to find product of 37x4 first she found 40x4=160 then adjusted that product by adding 3 groups of 4 to get

her final answer 172. What did she do incorrectly?

1 answer:

xeze [42]3 years ago

7 0

She added, but she added to 37, so she should have subtracted 3 groups of 4 instead of adding.

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Dean Halverson recently read that full-time college students study 20 hours each week. She decides to do a study at her universi

romanna [79]

Answer: The p-value is 0.154.

Step-by-step explanation:

Since we have given that

We claim that

Null hypothesis :

$H_0:\mu=20$

Alternate hypothesis :

$H_1:\mu$

Population mean = 20 hours

Sample mean = 18.5 hours

Sample standard deviation = 4.3 hours

Sample size n = 35

So, test statistic would be

$z=\dfrac{\bar{X}-\mu}{\dfrac{\sigma}{\sqrt{n}}}\\\\z=\dfrac{18.5-20}{\dfrac{4.3}{\sqrt{35}}}\\\\z=\dfrac{-1.5}{0.726}\\\\z=-2.066$

So, the p value would be 0.154.

Hence, the p-value is 0.154.

4 0

3 years ago

A football has a water container with 25 liters of water in it. Each players needs 3 liters of water to stay hydrated. Write as

KIM [24]

Improper fraction: 25/3
Mixed number: 8 1/3

8 0

3 years ago

A recent survey of 1090 U.S. adults selected at random showed that 623 consider the occupation of firefighter to have very great

REY [17]

Answer:

0.572

Step-by-step explanation:

From the question,

We have

n = 1090 of US adults

x = 623 selected from this population at random who consider the occupation to be one of great prestige

So we have that

The probability of X = x/n

= 623/1090

= 0.572

We conclude that 0.572 is the probability that a US adult selected at random thinks the occupation has great prestige.

7 0

3 years ago

-6(6v - 7) = 186<br> What does v equal?

Leni [432]

Answer:

-4

Step-by-step explanation:

-36v+42=186

-36v=144

v=-4

7 0

3 years ago

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Irma and Kate have summer jobs selling newspaper subscriptions door-to-door, but their

snow_tiger [21]

Check o go gg LE 2345

6 0

3 years ago