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FrozenT [24]
3 years ago
9

Frances has no money in her checking account. she writes 3 checks for $35 each. the bank imposes $15 penalty because she has ove

rdrawn her account. how much money is in her account now?
Mathematics
2 answers:
Marizza181 [45]3 years ago
8 0
0-35=-35-(-35)=-70-(-35)=-105-(-15)=-120. so -120 would be your answer. hope this helped. 
Gwar [14]3 years ago
8 0

Answer:

-\$120

Step-by-step explanation:

We have been given that Frances has no money in her checking account. She writes 3 checks for $35 each.

The amount drawn from the account would be 3\times \$35=\$105.

The amount after imposing $15 penalty would be \$105+\$15=\$120.

Since Frances has no money in her checking account initially, so she will have a debt of -\$120.

Therefore, she has -\$120 in her account now.

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A study was conducted to investigate the effectiveness of hypnotism in reducing pain. An SRS of 8 subjects was randomly selected
chubhunter [2.5K]

Answer:

e. No, the p-value is greater than 0.01, so there is insufficient evidence at the 0.01 level to conclude that pain levels are lower after hypnotism.

Step-by-step explanation:

Hello!

The study's objective is to test if hypnotism reduces pain.

A sample of n=8 subjects was taken and the pain level was recorded in each subject before and after being hypnotized.

The variable of interest was determined by calculating the difference of pain level after - before hypnosis. This is a paired sample test and the variable can be determined as:

Xd: Difference between pain level felt after hypnosis and pain level felt before hypnosis of a subject.

The sample average and standard deviation obtained were:

Xd= -3

Sd= 3

And the variable is presumed to be approximately normal.

An approximately normal distribution is enough to conduct a paired sample t-test.

If the claim is that hypnosis reduces pain, then the average pain level after hypnosis should be less than the average pain level before hypnosis, then the average difference is expected to be negative, symbolically: μd < 0

The test will be one-tailed and so will be the p-value.

Remember: The p-value is defined as the probability corresponding to the calculated statistic if possible under the null hypothesis (i.e. the probability of obtaining a value as extreme as the value of the statistic under the null hypothesis).

So first step is to calculate the value of the statistic under the null hypothesis and then you can calculate the p-value.

H₀: μd ≥ 0

H₁: μd < 0

t_{H_0}= \frac{X_d-Mu_{d}}{\frac{S_d}{n} }= \frac{-0-0}{\frac{3}{\sqrt{8} } } = -2.828= -2.83

The DF of the t-test are n-1= 7

Then you can calculate the p-value as:

P(t₇≤-2.83)= 0.0127

The level of the test is α: 0.01

The decision rule is:

If p-value ≤ α, reject the null hypothesis.

If p-value > α, do not reject the null hypothesis.

The p-value > α the decision is to not reject the null hypothesis.

Correct option: e. No, the p-value is greater than 0.01, so there is insufficient evidence at the 0.01 level to conclude that pain levels are lower after hypnotism.

I hope this helps!

5 0
3 years ago
If 4 is subtracted from twice a number, the result is 10 less than the number. Write an equation to solve this problem. Use n as
skelet666 [1.2K]
2n-4= n-10
-n. -n
n-4=-10
+4. +4
n=-6

Final answer: -6
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Quadrilateral ABCD is rotated 270° clockwise about the origin. What is the orientation of the rotated figure, and what quadrant
USPshnik [31]

Answer:

the second quadrant

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16 2/3 percent of what number is 72
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The answer is about 432.178
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Three kids are dividing a pizza with a total of 8 pieces. How many pieces can each kid
Alex

Answer:

Each kid can have 2 pieces

Step-by-step explanation:

8 / 3 = 2.67

6 0
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