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Amanda [17]
3 years ago
11

The scores on a standardized test are normally distributed with a mean of 80 and standard

Mathematics
1 answer:
blsea [12.9K]3 years ago
3 0

Answer:

84.5

Step-by-step explanation:

Given :

Mean μ = 80

Standard deviation, σ = 5

Z = number of standard deviations from the mean, Z = 0.9

Teat score, x

Using the Zscore formula :

Zscore = (x - μ) / σ

Plugging in our values :

0.9 = (x - 80) / 5

Cross multiply

0.9 * 5 = x - 80

4.5 = x - 80

4.5 + 80 = x

x = 84.5

Test score = 84.5

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Answer:

Explained

Step-by-step explanation:

No, Multiplication does not always makes number bigger. When number is Multiplied by any number less than 1 the magnitude of the number decreases. Also any number multiplied by a negative number also reduces the number,

Example 5×2= 10 and 5×0.2= 1 clearly , 1<5

also, 5×(-2) = -10 which is also less than 5.

6 0
4 years ago
Evaluate the expression when a=-6 and c= 2 .<br> a-4c
Harman [31]

Answer:

-14

Step-by-step explanation:

a-4c=(-6)-4(2)=-6-8=-14. Hope this helps!

5 0
3 years ago
Read 2 more answers
Find the slope and y-intercept of the line
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Answer:

C

Step-by-step explanation:

The slope is 1.  Note how each time x increases by 1 unit, y also increases by 1 unit.

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Answer C is correct.

5 0
3 years ago
Alex is thinking of a double fact. The sum is greater than the sum of 7+7 but less than the sum of 8+9. What fact is Alex thinki
schepotkina [342]
Use an inequality:
S = sum

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14 < S < 17

so the sum is between 14 and 17


8 0
4 years ago
identify the type of data​ (qualitative/quantitative) and the level of measurement for the expenses of respondents in a survey.
Paha777 [63]

Expenses of respondents in a survey is a quantitative data and the level of measurement is a ratio scale.

<h3>What is a Qualitative and a Quantitative Data?</h3>

A quantitative data can be described as a type of data that you can measure or counted, and also given a numerical value to, while a qualitative data is a type of data that cannot be expressed using numbers.

Examples of quantitative data include, number of students in a class, weight of students in a class, etc.

Examples of qualitative data include hair color, religion, nationality, etc.

Expenses of respondents can be given numerical values, therefore, expenses of respondents in a survey is a quantitative data and the level of measurement is a ratio scale.

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brainly.com/question/96076

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6 0
1 year ago
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