If an athlete is tested for a certain type of drug usage, then the test will come out either positive or negative. However, these tests are never perfect. Some athletes who are drug free test positive, and some who are drug users test negative. The former are called false positives; the latter are called false negatives. Assume that 5% of all athletes use drugs, 4% of all tests on drug-free athletes yield false positives, and 10% of all tests on drug users yield false negatives. Define the events as follows: Free: an athlete is drug free. User: an athlete is a drug user. Positive: an athlete is tested positive Negative: an athlete is tested negative. Then, we have P(User) - 0.05, P(Positive Free) = 0.04, and P(Negative User) - 0.10, What is the probability that a randomly selected athlete tests positive, P(Positive)? a. 0.083 b. 0.127 c. 0.308 d. 0.312

Answers

Answer 1

Answer:

positive...............

Related Questions

Estimate the diameter of a circle with a circumference of 80 ft. Use 3.14 for pi

Answers

Round your answer to the nearest hundredth if necessary. Estimate the diameter of a circle with a circumference of 80 feet.

Use the distributive property and mental math to find the product 5 x 49

Answers

5x49=245 this is simple math

Answer: 5 x 49 = 245

What is the distance between (1, -1) and (-2,3) ?

Answers

Answer:

the answer is 5

please someone help me, ill give brainiest pls just help me its my last question on math:

Which comparison is correct?
1 2 3 or 4

1. 7 < 3
2. -2 > -7
3. -9 > 4
4. -6 > -5

Answers

Answer:

2. -2> -7 ...............

2 is the anser hahdhwkqkqoqowijwbs

Can you please help me

Answers

9514 1404 393

Answer:

volume: 200 cm³surface area: 220 cm²

Step-by-step explanation:

The usual formulas are useful for this.

V = LWH

V = (10 cm)(4 cm)(5 cm) = 200 cm³

The volume is 200 cubic centimeters.

SA = 2(LW +H(L +W))

SA = 2((10 cm)(4 cm) +(5 cm)(10 cm +4 cm)) = 2(40 +5(14)) cm² = 220 cm²

The surface area is 220 square centimeters.

Write the expanded form for each expression.

2(i + 5j)

-0.4(h - 1)

i(8 + 2h-6)

Answers

Answer:

2i + 10j

-0.4h + 0.4

8i +2hi - 6i = 2i + 2hi

URGENT
Solve each triangle. Show work.

Answers

Answer:

Multiply the 27 yd × 30 yd then after the other one do the same thing but after All divide it by 17

A car travels 56 miles in 3.5 hours.
a. What is the unit rate?
b. How long will it take the car to travel 120 miles?
c. How far will the car travel in 6 hours?

Answers

A = 16 miles per hour
B = 7.5 hours
C = 96 miles

Step by step explanation:

A: If the car travels 56 miles in 3.5 hours you divide the 56 miles by the 3.5 hours and then you will get your unit rate of 16 miles per hour.

B: Now that you know that your unit rate is 16 miles per hour you can figure out how long it will take the car to travel 120 miles. To find this answer all you have to do is divided the amount the car traveled, 120 miles, by the unit rate, 16 miles per hour. After doing the division you will get your answer of 7.5 hours/ 7 hrs and 30 mins.

C: This one is pretty simple. All you have to do is take your unit rate of 16 and multiply it by the 6 hours. After doing your multiplication you will get your answer of 96 miles.

I hope you understand and this answered all of your questions. :)

The ratio of green to white candles is 2:5. If there are 32 green candles, how many white candles are there?

Answers

Answer:

80?

Step-by-step explanation:

Answer:

80 white candles

Step-by-step explanation:

I use a way that makes it easy for me

2:5 means [tex]\frac{2}{5}[/tex]

so when you write [tex]\frac{2}{5} =[/tex][tex]\frac{32}{x}[/tex]

that means you do the cross multiplication method which makes the equation go that way:

[tex]2x=32*5[/tex]

[tex]2x=160\\x= 80[/tex]

Ms. Gittens went out to dinner and the total bill was $60. She wants to give the waiter a %20 tip. How much money should Ms. Gittens give the waiter for a tip?

Answers

Answer:

$12

Step-by-step explanation:

20% of 60 = 12

Answer:

12 .....20% of 60 is = 12

Step-by-step explanation:

3
1

+a=
4
5
mmmmmmmmmmmmmmmmmmmmmmmmm

Answers

i'm confused, can you tell me the question?

ryan climbed 100 steps in 50 seconds. How many steps did he climbed per second? Step by step. Show the full procedure.

Answers

Well Ryan climbed at a speed of 100 steps per 50 seconds so if you take the steps which is a hundred and the time of 50 seconds and divide the two you will get a result of 2 steps per second.

Which equation represents 7/3 ? Select all that apply.

Answers

I’ll say B , E , and D hope this helps

Let h(x)=|2x|-4. Find h(x) when x = -7.
a)-10
b) 10
c) -13
d) 13
Plzzz

Answers

Maybe use math photo

On a coordinate plane, triangles A B C and D E F are shown. Triangle A B C has points (negative 10, negative 10), (negative 10, negative 4), and (4, negative 10). Triangle D E F has points (0, 8), (12, 4), and (5, 0). Which statement is true of the right triangles ABC and DEF? Area of ABC is greater than area of DEF. Area of ABC is less than area of DEF. Area of ABC is equal to the area of DEF. There is not enough information to compare the areas of triangles ABC and DEF.

Answers

Answer:

Area of ABC is greater than area of DEF

Step-by-step explanation:

Answer:

A. Area of ABC is greater than area of DEF.

If C is the incenter of ∆AMD, m∠A M C = 3 x + 6 and m∠ DMC= 8 x − 49.
find ∠ M A D (just numbers, no degrees signs).

Answers

Answer:51.

Hope this will help you lot.

Answer:

<MAD=66

Step-by-step explanation:

to find x:

8x-49=3x+6

x=11

to find DMC:

8(11)-49

<DMC=39

<ADM=36

to find ADC:

36/2

<ADC=18

If I have 10 apples, 3 oranges and 7 pears how may oranges do i have?

Answers

Isn’t it supposed to be 3 oranges ?

Answer:

20 oranges.

Step-by-step explanation:

If you add 10 and 3 that gives you 13,

now add the 7 and that should give you 20.

If $6,000 is invested for 5 years with a 3.5% yearly interest rate, what is the amount of simple interest earned?

Answers

Answer:

1,050

Step-by-step explanation:

Simple Interest = Principle×Rate×Time/100

=6,000×5×3.5/100

=1,050

what is -2.14285714 rounded to the nearest whole

Answers

Answer:

-2

Step-by-step explanation:

what is the volume of this composite solid

Answers

Answer:

Step-by-step explanation:

198 cubic meters

what is the answer to 5 + 5

Answers

Answer:

Step-by-step explanation:

A phone company plans on offering their new smartphone in four colours: white, black, silver and rose gold. They anticipate that 30% of shoppers will prefer white, 35% will prefer black, 20% will prefer silver and 15% will prefer rose gold. They perform market research by asking a random sample of 350 potential customers which colour they prefer.

Color White Black Silve Rose Gold
Frequency 99 135 89 27

Can the company conclude that their expected distribution was accurate using a 10% level of significance?

a. Calculate the test statistic.
b. Determine the critical value(s) for the hypothesis test.
c. Conclude whether to reject the null hypothesis or not based on the test

Answers

COLOR I need help with this qeustion also pls tell me when u get the answer

The test statistics is χ² = 8.31

The critical value is 6.251.

We reject the null hypothesis that the expected distribution is accurate.

What is hypothesis testing?

Hypothesis testing is a statistical method that is used to make decisions about a population based on a sample of data.

It involves testing a null hypothesis (H0) against an alternative hypothesis (Ha) using statistical techniques.

We have,

To test whether the expected distribution was accurate, we need to perform a chi-square goodness-of-fit test.

The null hypothesis is that the expected distribution is accurate, and the alternative hypothesis is that it is not accurate.

The expected frequencies are:

Color:

White Black Silver Rose Gold

105 122.5 70 52.5

i.e

Expected Freq:

0.3 x 350 = 105

0.35 x 350 = 122.5

0.2 x 350 = 70

0.15 x 350 = 52.5

Using the formula for the chi-square goodness-of-fit test statistic:

χ² = ∑ (Observed Frequency - Expected Frequency)² / Expected Frequency

χ² = [(99-105)²/105] + [(135-122.5)²/122.5] + [(89-70)²/70] + [(27-52.5)²/52.5]

χ² = 8.31

The critical value for the chi-square test with 3 degrees of freedom (4 categories - 1) and a significance level of 0.10 is 6.251.

Since the calculated test statistic (8.31) is greater than the critical value (6.251), we reject the null hypothesis that the expected distribution is accurate.

Therefore, the company cannot conclude that their expected distribution was accurate using a 10% level of significance.

Thus,

The test statistics is χ² = 8.31

The critical value is 6.251.

We reject the null hypothesis that the expected distribution is accurate.

Learn more about hypothesis testing here:

https://brainly.com/question/30588452

#SPJ2

Suppose a pack of candy bars has 4 bars. Each bar weighs 3.38 ounces. How much does the pack weigh?

Answers

Answer:

13.52 ounces I think...

Step-by-step explanation:

4x3.38 subtract the decimal and add it again...

If each person uses 70 gallons of water per day, how many gallons will 57 people use in a day?

Answers

3990

Step-by-step explanation:

57*70=3990

How many 1/5s are in 1?

Answers

Answer:

Step-by-step explanation:

What is the equation of the line in slope-intercept form?
Write your answer using integers, proper fractions, and improper fractions in simplest form.

Answers

Answer:

y = -3/2x - 2

y int is -2

x int is -3/2

. If the circumference of a circle is 20π inches long what is the measure of the diameter in inches?

Answers

Answer:

d≈6.37

Step-by-step explanation:

whats the slope of the line shown???

Answers

Answer:

1 over 2 or 1 half, you can use rise(y value) over run(x value)

I NEED HELP ASAP!!! PLEASE HELP!!!

Answers

Answer:

from B we get y = -2x + 2

part c: slope, m =-2 and b=2

Step-by-step explanation:

Yes this is correct ^^^^

9 +10 =

please help

I will give brainliest and 5 star and 10 points for the best answer

Answers

What’s 9 + 10? 21 :(

Answer:

910

Step-by-step explanation:

just remove the plus sign (+) to get your answer :)

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