All categories

3 years ago

Please help for a brainlist ;))

1 answer:

6 0

The answer is option A.

The $50 initial membership fee represents the y-intercept (b), while the $20 monthly membership fee represents the slope (m) of the equation.

You might be interested in

Shelby is shopping for fruit to pack in her lunch each day this week. She's sees that grapes are on sale for $1.49/lb and pears

kvasek [131]

Answer:

What am i supposed to be solving please give more description

Step-by-step explanation:

5 0

3 years ago

Select True or False from each pull-down menu, depending on whether the corresponding statement is true or false.

Nina [5.8K]

Answer:

1) FALSE

2) FALSE

3) TRUE

4) TRUE

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Part 1

The mean and standard deviation of a normally distributed random variable which has been standardized are one and zero, respectively.

The mean and the deviation for the normal standard distribution are:

$\mu=0, \sigma =1$

So then that's FALSE.

Part 2

Using the standard normal curve, the z−score representing the 10th percentile is 1.28.

We are looking for a value a, that satisfy this:

$P(X>a)=0.90$ (a)

$P(X$ (b)

We can find a z value that satisfy the condition with 0.10 of the area on the left and 0.90 of the area on the right it's z=-1.28. On this case P(Z<-1.28)=0.10 and P(Z>-1.28)=0.90

So that's FALSE.

Part 3

Let z1 be a z−score that is unknown but identifiable by position and area. If the symmetrical area between −z1 and +z1 is 0.9544, the value of z1 is 2.0

If we find this probability:

$P(-2.0< Z$

So on this case we can approximate to 0.9544. And that's TRUE.

Part 4

Using the standard normal curve, the z−score representing the 75th percentile is 0.67.

We are looking for a value a, that satisfy this:

$P(X>a)=0.25$ (a)

$P(X$ (b)

We can find a z value that satisfy the condition with 0.75 of the area on the left and 0.25 of the area on the right it's z=0.67. On this case P(Z<0.67)=0.75 and P(Z>0.67)=0.25

So that's TRUE.

5 0

3 years ago

Two planes intersect in a point Oray line line segment

ratelena [41]

Answer:

Line

Step-by-step explanation:

Planes intersect along a line.

5 0

3 years ago

given 65,72 and 96 as the three sides of a triangle, classify it as one of the following in the picture. please help!!!!

Valentin [98]

Answer: A) Acute

Step-by-step explanation:

Compare the sum of the squares of the two smaller numbers (a² + b²) to the square of the largest number (c²).

If a² + b² > c², then the triangle is Acute

If a² + b² = c², then the triangle is Right

If a² + b² < c², then the triangle is Obtuse

65² + 72² ____ 96²

4225 + 5184 ____ 9216

9409 > 9216 So, the triangle is Acute.

7 0

3 years ago

Suppose that at Northside High, the number of hours per week that seniors spend on homework is approximately Normally distribute

Aliun [14]

Answer:

The mean of the sampling distribution of means for the 36 students is of 18.6 homework hours per week.

Step-by-step explanation:

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

In this question:

For the population, the mean is 18.6. So, by the Central Limit Theorem, the mean of the sampling distribution is also 18.6.

3 0

3 years ago