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RUDIKE [14]
2 years ago
7

In a recent survey of 150 teenagers, 93 stated that they always wear their seat belt when they travel in a car. Assuming the dis

tribution is approximately normal, find the point estimate and standard error for the proportion of teenagers that always wear a seat belt when traveling in a car. Round your answers to two decimal places, as needed.
Mathematics
1 answer:
irinina [24]2 years ago
3 0

Answer:

Point estimate = 0.62

Step-by-step explanation:

Point estimate = x/n

Given

n is the sample size = 150

X = Those that wear their seat belt

X = 93

Point estimates = 93/150

Point estimates = 0.62

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Which graph represents the function f(x)= 0.2^x + 3
Dennis_Churaev [7]

The third graph or bottom left graph represents f(x) = 0.2^{x} + 3.

Step-by-step explanation:

Step 1:

To determine which of the given graphs represents the equation f(x) = 0.2^{x} + 3, we substitute some values in the place of x.

When x=0, f(x) = 0.2^{x} + 3, f(0) = 0.2^{0} + 3= 4.

Anything with an exponent of 0 will equal 1.

So the graphs on the right side cannot be the answers.

Step 2:

Now we substitute another value to determine which graph represents f(x) = 0.2^{x} + 3.

When x=1, f(x) = 0.2^{x} + 3, f(1) = 0.2^{1} + 3= 4.2.

The value of f(x) when x=1 is lesser than the value of f(x) when x =0.

So the third graph or bottom left graph represents f(x) = 0.2^{x} + 3.

5 0
3 years ago
Look at the arrows in the drawings below. Indicate whether the arrows are parallel, perpendicular, or neither.
IceJOKER [234]

Answer:

In A and D the arrows are perpendicular, in B they are parallel and in C they are neither parallel nor perpendicular.

Step-by-step explanation:

3 0
3 years ago
The probability Jake will arrive at school on time is<br> 0.87. What is the complement of this?
3241004551 [841]

Answer:sorry need some points for help

Sorry so sorry

Step-by-step explanation:

Sorry

5 0
3 years ago
Read 2 more answers
Determine the better buy. 12 oz for $2.69 or 16 oz for $2.49?
topjm [15]
12 oz for 2.68 = .22 per unit
16 oz for 2.49 = .16 per unit

the 16 oz for 2.49 is your better deal

5 0
3 years ago
Read 2 more answers
2. John and Jen went to the farmers market to buy fruit. John bought 3 boxes of oranges and 9 boxes of cherries for $78. Jen bou
jenyasd209 [6]

Answer:

Let the cost of orange be X and cost of cherry be y

3x + 9y = 78

8x + 4y = 58

Solving equation using elimination method

multiplying eq 1 with 8 and eq 2 with 3

8(3x + 9y ) = 78(8)

3( 8x + 4y) = 3(58)

24x + 72 y = 624

24x + 12y = 174

subtracting,

60 y = 450

y = 7.5

3x + 9(7.5) = 78

3x + 67.5 = 78

3x = 78 - 67.5

3x = 10.5

x = 3.5

<h2>Box of orange = $3.5 </h2><h2>Box of cherry = $7.5</h2>
7 0
1 year ago
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