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Bogdan [553]
2 years ago
15

Please help me!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics
1 answer:
mihalych1998 [28]2 years ago
6 0

Answer:

sorry dont know

Step-by-step explanation:

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A high school student took two college entrance exams, scoring 1070 on the SAT and 25 on the ACT. Suppose that SAT scores have a
antoniya [11.8K]

Answer:

Due to the higher z-score, he did better on the SAT.

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Determine which test the student did better on.

He did better on whichever test he had the higher z-score.

SAT:

Scored 1070, so X = 1070

SAT scores have a mean of 950 and a standard deviation of 155. This means that \mu = 950, \sigma = 155.

Z = \frac{X - \mu}{\sigma}

Z = \frac{1070 - 950}{155}

Z = 0.77

ACT:

Scored 25, so X = 25

ACT scores have a mean of 22 and a standard deviation of 4. This means that \mu = 22, \sigma = 4

Z = \frac{X - \mu}{\sigma}

Z = \frac{25 - 22}{4}

Z = 0.75

Due to the higher z-score, he did better on the SAT.

8 0
3 years ago
Pls help me I’m failing only do one I just need it to be in frame ._.
lorasvet [3.4K]

Answer:

get someone else to do it

Step-by-step explanation:

wish you luck

7 0
3 years ago
A culture of 100,000 bacteria triples every hour. How many bacteria were there 3 hours ago? (easy steps please)​
Crank

Answer:

If it multiplies by 3 each hour, you would divide by three if you are looking for the first term. It is Geometric Sequence.

Step-by-step explanation:

100,000/3=33333.3333333 (1/3)

5 0
3 years ago
Amanda is riding her bicycle. She rides for 17.5 kilometers at a speed of 7 kilometers per hour. For how many hours does she rid
Misha Larkins [42]
She was riding for 2 hours and 30 mins
8 0
3 years ago
Help me please , will mark brainliest
Gnom [1K]

Answer:

1. 160ft

2. 218.64ft

3. 84ft

4.  140.67

Step-by-step explanation:

L*W*H / 3

5 0
2 years ago
Read 2 more answers
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