Kaspaueru2

2021-12-18

A personality test is administered to a large group of subjects. Five scores are shown below, in original units and in standard units. Fill in the bla

.

$$\left[\begin{array}{ccccc}79& 64& 52& 72& -\\ 1.8& 0.8& -& -& -1.4\end{array}\right]$$

.

Nadine Salcido

Beginner2021-12-19Added 34 answers

The normal standard variable is z.

$z=\frac{x-\mu}{\sigma}$

When $x=79,z=1.8i.e.$

$1.8=\frac{79-\mu}{\sigma}\Rightarrow \mu +1.8\sigma =78$

When $x=64,z=0.8i.e.$

$0.8=\frac{64-\mu}{\sigma}\Rightarrow \mu +0.8\sigma =64$

Solving the two equations above results in

$\sigma =14$

Now, $\mu +1.8\left(14\right)=78\Rightarrow \mu =52.8$

When $x=52$

$z=\frac{52-52.8}{14}=-0.06$

When $z=-1.4$

$-1.4=\frac{x-52.8}{14}$

$\Rightarrow =33.2$

Answer: $\mu =52.8\text{}{\textstyle \phantom{\rule{1em}{0ex}}}\text{and}{\textstyle \phantom{\rule{1em}{0ex}}}\text{}\sigma =14$

usaho4w

Beginner2021-12-20Added 39 answers

Use z-score formula to find the missing values.

$z=\frac{x-mean}{sd}$

$sd=$ standard deviation

First you have to figure out the mean and standard deviation.

Lets

First you have to figure out the mean and standard deviation.

Lets

22+64

When a cold drink is taken from a refrigerator, its temperature is 5 degree C. After 25 minutes in a 20 degree C room its temperature has increased to 10 degree C. What is the temperature of the drink after 50 minutes?

How many minutes are there in $2\frac{3}{5}$ hours?

Find the answer for $64$ power $\frac{1}{6}$.

The following law describes the relationship between gas volume and pressure: ________. A)Boyle's law; B)Henry's law; C)Charles' law; D)Dalton's law

If an electric switch is open then no current flows through the circuit.

A)True;

B)FalseThe price elasticity of supply of a good is 0.8. Its price rises by 50 per cent. Calculate the percentage increase in its supply.

How many quarts are in 10 gallons?

When the net force acting on an object is zero, the total momentum of the system will:

A)remain constant;

B)increase with time;

C)decrease with time;

D)None of theseHow many centimeters are in four meters?

A notebook computer has a mass of 2.25 kilograms. About how many pounds does the notebook weigh?

If the dot product of two non-zero vectors is zero, then the vectors A)are parallel to each other. B)are perpendicular to each other. C)can have any orientation. D)are anti-parallel to each other.

Which is longer 5 miles or 10 kilometers?

9 grams is how many milligrams?

How to write $673.5$ in scientific notation?