1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
andrew11 [14]
3 years ago
6

Matthew participates in a study that is looking at how confident students at SUNY Albany are. The mean score on the scale is 50.

The distribution has a standard deviation of 10 and is normally distributed. Matthew scores a 65. What percentage of people could be expected to score the same as Matthew or higher on this scale?
a) 93.32%
b) 6.68%
c) 0.07%
d) 43.32%
Mathematics
1 answer:
Alex Ar [27]3 years ago
7 0

Answer:

b) 6.68%

Step-by-step explanation:

Normal Probability Distribution

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

The mean score on the scale is 50. The distribution has a standard deviation of 10.

This means that \mu = 50, \sigma = 10

Matthew scores a 65. What percentage of people could be expected to score the same as Matthew or higher on this scale?

The proportion is 1 subtracted by the p-value of Z when X = 65. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{65 - 50}{10}

Z = 1.5

Z = 1.5 has a p-value of 0.9332.

1 - 0.9332 = 0.0668

0.0668*100% = 6.68%

So the correct answer is given by option b.

You might be interested in
PLease help me out will mark brainliest<br><br> 88pts
Reil [10]

Answer:

8

Step-by-step explanation:

by mutiplying the inequality

7 0
3 years ago
Edgar has 2.8 meters of rope. If he cuts it into 7 equal parts, how long will each piece be?
WITCHER [35]
2,8 meters than cuts it into 7 equal parts so each piece will be 

2,8/7 = 0,4 meters 

hope helped 
8 0
3 years ago
Read 2 more answers
The ratio of students wearing sandals to those wearing sneakers is 5 : 1. If there are 30 students in the class, and all of them
Igoryamba

Step-by-step explanation:

5:1 =<u> </u><u>5</u>

<u> </u><u> </u><u> </u> 1

= <u>5</u><u> </u><u> </u>× 30

<u> </u><u> </u><u> </u><u> </u>1

any standing alone is on one so

<u>6</u><u> </u>× <u>3</u><u>0</u>

1 1

<u>1</u><u>8</u><u>0</u>

1

180

7 0
3 years ago
4 of 10<br> As an estimation we are told 5 miles is 8<br> km.<br> Convert 100 km to miles.<br> miles
kaheart [24]

8km=5miles

1miles= 5/8=0.625mile

100km = 100x0.625=63.5 miles

3 0
1 year ago
The average adult human has approximately 2.5 X 10' red blood cells and 7 X 10' white
Anit [1.1K]

Answer:

\large \boxed{r =\dfrac{\text{RBC}}{\text{WBC}};\,\text{400 times}}

Step-by-step explanation:

I think your missing numbers are

RBC = 2.5 × 10¹³ and  

WBC = 7    × 10¹⁰

This is a ratio question.

You are asked to find the ratio of RBCs to WBCs.

Let r = the ratio.

Then the equation for the ratio is

\mathbf{r} =\mathbf{ \dfrac{\text{RBC}}{\text{WBC}}}

Insert the values and do the division.

\begin{array}{rcl}r& =& \dfrac{\text{RBC}}{\text{WBC}}\\\\& =&\dfrac{2.5 \times 10^{13}}{7 \times 10^{10}}\\\\& =&\mathbf{400}\\\end{array}\\\text{The number of RBCs is $\large \boxed{\textbf{400 times}}$ as great as that of the WBCs.}

8 0
3 years ago
Other questions:
  • The speed of the light is 3x10 9 m/s, how much time it would to travel a distance of 1000km
    11·1 answer
  • He truck is rented at $40 per day plus they charge per mile of use the truck travel 15 miles in one day and the total charge was
    10·2 answers
  • 6 points and brainliest answer
    15·1 answer
  • Wilma is twice as old as Jamal, and Jamal is 3 years older than Tim. The sum of all their ages is 17.
    11·1 answer
  • What are the real solutions of the equation x^4= 81?
    13·1 answer
  • Which<br> expression is equivalent to<br> X^-5/3
    10·1 answer
  • You buy a hat for $12 and give the cashier a $20 bill. How much change do you receive?
    5·1 answer
  • In ΔMNO, m∠M = 57° and m∠N = 75°. Which list has the sides of ΔMNO in order from shortest to longest?
    15·1 answer
  • If Emma has all a's and one d what is her gpa? she has 6 classes in total
    14·1 answer
  • Find the value of the equation
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!