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3 years ago

Properties of Transformation.

Mathematics

1 answer:

kumpel [21]3 years ago

8 0

Answer:

distance (lengths of segments remain the same)

angle measures (remain the same)

parallelism (parallel lines remain parallel)

collinearity (points remain on the same lines)

orientation (lettering order remains the same)

Step-by-step explanation:

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My quiz had 15 questions, I got a score of 67.8%. how many questions did I get wrong?

Ne4ueva [31]

You take 67.8/100×15
10.17
then take 15-10.17 the answer will be the wrongs u got
=4.83

4 0

3 years ago

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There were 324 adults surveyed. Among the participants, the mean number of hours of sleep each night was 7. 5 and the standard d

NeTakaya

The margin of error for 324 adults surveyed with 1.6 standard deviations is 0.1742.

<h3>What is the margin of error?</h3>

The margin of error can be defined as the amount of random sampling error in the results of a survey. It is given by the formula,

$\text{MOE}_{\gamma}=z_{\gamma} \times \sqrt{\frac{\sigma^{2}}{n}}$

$\text{MOE}$ = margin of error

$\gamma$ = confidence level

$z_{\gamma}$ = quantile

σ = standard deviation

n = sample size

As it is given that the sample size of the survey is 324, while the standard deviation of the survey is 1.6.

We know that the value of the z for 95% confidence interval is 1.96. Therefore, using the formula of the standard of error we can write it as,

$\text{MOE}_{\gamma}=z_{\gamma} \times \sqrt{\dfrac{\sigma^{2}}{n}}\\\\\text{MOE}_{\gamma}=1.96 \times \sqrt{\dfrac{1.6^{2}}{324}}\\\\\text{MOE}_{\gamma}=0.1742$

Hence, the margin of error for 324 adults surveyed with 1.6 standard deviations is 0.1742.

Learn more about Margin of Error:

brainly.com/question/6979326

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3 years ago

If 12 oz of honey costs 4.49 how much does 1 oz of honey cost

mihalych1998 [28]

Answer:

37 cents

Step-by-step explanation:

8 0

4 years ago

The scores on a math test are normally distributed with a mean of 78 and a standard deviation of 6. The test scores range from 0

Hunter-Best [27]

Answer:

The estimate for the number of students who took the test is 23.

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 78

Standard deviation = 6

Since the normal distribution is symmetric, 50% of the students had scores above the mean and 50% had scores below the mean.

Proportion of students who scored between 72 and 90:

72 = 78 - 6

So 72 is one standard deviation below the mean.

Of the 50% of the students who scored below the mean, 68% scored above 72.

90 = 78 + 2*6

So 90 is two standard deviations above the mean.

Of the 50% of the students who scored above the mean, 95% scored below 72.

Then

0.68*0.5 + 0.95*0.5 = 0.815

81.5% of the students scored between 72 and 90.

Nineteen students had test scores between 72 and 90. Estimate the number of students who took the test.

19 is 91.5% = 0.815 of the total number of students.

How much is 100% = 1?

19 - 0.815

x - 1

$0.815x = 19$

$x = \frac{19}{0.815}$

$x = 23.3$

Rounding to the nearest whole number

The estimate for the number of students who took the test is 23.

6 0

4 years ago

Pleas help me with this

Sidana [21]

Answer:

The probability of a number bigger than 4 when o dice is rolled is 2/6 or in decimal 0.333.....

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers