Ask question

Ask question

All categories

3 years ago

5

In a random sample of 75 individuals, 52 people said they prefer coffee to tea. 99.7% of the population mean is between 84/80/74

% and 64/58/54%. (Choose the option closest to your answer.)

1 answer:

myrzilka [38]3 years ago

7 0

84 and 54 are your answers

You might be interested in

What is equal to x+5=18 in a diagram

morpeh [17]

Answer

x=12

Step-by-step explanation:

7 0

3 years ago

tickets to a play cost $11 each. There is also a service charge of $4 per order. Write ab equation for the relationship that giv

MA_775_DIABLO [31]

Y+(11•X)+4

Hope this helped!

5 0

4 years ago

Read 2 more answers

Question 3 of 10

yarga [219]

Answer: 60000

Step-by-step explanation:

The ten thousands place is the 5th digit from the right. Because the digit in the thousands place is less than 5, round down to 60000.

3 0

2 years ago

Read 2 more answers

The level of nitrogen oxides (nox) in the exhaust after 50,000 miles or fewer of driving of cars of a particular model varies no

mina [271]

<span>Answer: 0.533</span>

Explanation: Note that

$x \ \textgreater \ I \\ \Leftrightarrow x - 0.3 \ \textgreater \ I - 0.3 \\ \\ \Leftrightarrow \boxed{\frac{x - 0.3}{0.1} \ \textgreater \ \frac{I - 0.3}{0.1}} (1)$

Let

$z_1$ = z-score for I.
$z_2$ = z-score for x.

The formula for z-score is given by

$\text{z-score} = \frac{(\text{data point}) - (\text{mean})}{(\text{standard deviation})}$

So,

$z_2 = \frac{x - 0.3}{0.1}$

$z_1 = \frac{I - 0.3}{0.1}$

Based on inequality in (1),

$z_2 > \ z_1$

So,

$P(x \ \textgreater \ I) = 0.01
\\
\\ \Leftrightarrow P \left (\frac{x - 0.3}{0.1} \ \textgreater \ \frac{I - 0.3}{0.1} \right ) = 0.01 
\\
\\ \Leftrightarrow P(z_2 \ \textgreater \ z_1) = 0.01
\\
\\ \Leftrightarrow 1 - P(z_2 \leq z_1) = 0.01
\\
\\ \Leftrightarrow \boxed{P(z_2 \leq z_1) = 0.99}$

Since $z_1$ and $z_2$ are z-scores and the level of nitrogen oxides are normally distributed, using normal distribution calculator (or table),

$z_1 = 2.326
\\
\\ \Leftrightarrow \frac{I - 0.3}{0.1} = 2.326
\\
\\ \Leftrightarrow I - 0.3 = 0.1(2.326)
\\
\\ \Leftrightarrow I - 0.03 = 0.2326
\\
\\ \Leftrightarrow \boxed{I \approx 0.533}$

4 0

4 years ago

Simplify the rational expression: <br> 4a²-36/24-8a<br><br> (__/2)

Pavlova-9 [17]

Answer:

- (a + 3) / 2

Step-by-step explanation:

(4a² - 36)/(24 - 8a) =
4( a² - 9) /8(3 - a) =
( a² - 9) /2(3 - a) =
(a + 3)(a - 3)/2(3 - a) =
- (a + 3) (3 - a)/2(3 - a) =
- (a + 3) / 2

3 0

3 years ago