HELP PLEASE WILL MARK BRAINLIEST

Mathematics

1 answer:

White raven [17]2 years ago

7 0

Answer:

Wyatt must get a score of 150 on Exam B in order to do equivalently well as he did on Exam A.

Step-by-step explanation:

Let's calculate the test statistic of each score based on the mean and standard deviation of each test.

This statistic will show us <u><em>how far from the mean, measured in standard deviations, Wyatt's test score is</em></u>.

The formula for the test statistic is:

$\displaystyle Z = \frac{x- \mu}{\sigma}$
x = observed value
$\mu$ is the population mean
$\sigma$ is the population standard deviation

Let's calculate the test statistic for each test.

$\displaystyle Z = \frac{45-35}{5} = \frac{10}{5}= 2$

$\displaystyle Z = \frac{x-100}{25}$

Since we want the test statistic to be <u>the same for both</u> exam A and exam B, let Z = 2 and <em>solve for x</em> for Exam B.

$\displaystyle 2 = \frac{x-100}{25} \\ 50 = x - 100 \\ x = 150$

Wyatt must get a score of 150 on Exam B in order to do equivalently well as he did on Exam A. This score means that Wyatt is 2 standard deviations from the mean score on Exam B as he scored on Exam A.

You might be interested in

Jennifer is shopping with her mom. They pay 2 dollars per pound for tomatoes. What is the constant of proportionality in the sit

pantera1 [17]

2x=y where 2 is dollars per tomatoe, x is amount of pounds of tomatoes, and y is amount of money spent in total. say you got 3 pounds of tomatoes; the equation would be 2(3)=y. y=6. Hope I helped!

5 0

3 years ago

A savings account for a car is set up with an initial balance of $2500, and $100 is added every month

Montano1993 [528]

Answer:

Step-by-step explanation:

3600 = 100x+2500

1100 = 100x

x = 11

3 0

3 years ago

21. Water that is sprayed upward from a

sleet_krkn [62]

Answer:

2 seconds to maximum height
20 meters maximum height
4 seconds to reach the ground

Step-by-step explanation:

The function can be graphed using a graphing calculator, geometry app, or spreadsheet. One such graph is attached. Often, these tools are capable of identifying extrema and intercepts.

<h3>extreme</h3>

The vertex of the graph is reported as (x, y) = (2, 20). This means the maximum height is reached after 2 seconds. That maximum height is 20 meters.

<h3>intercept</h3>

The drop is launched from ground level at x = 0 seconds. It returns to ground level at x = 4 seconds.