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3 years ago

What is the length of line BC , rounded to the nearest tenth?

Mathematics

1 answer:

GuDViN [60]3 years ago

6 0

Hi I Think The Answer is:

31.2 units

Hope This Helped

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Health insurers are beginning to offer telemedicine services online that replace the common office visit. A company provides a v

Veronika [31]

Answer:

$\text {CI} = (60.54, \: 81.46)\\\\$

Therefore, we are 95% confident that actual mean savings for a televisit to the doctor is within the interval of ($60.54 to $81.46)

Step-by-step explanation:

Let us find out the mean savings for a televisit to the doctor from the given data.

Using Excel,

=AVERAGE(number1, number2,....)

The mean is found to be

$\bar{x} = \$71$

Let us find out the standard deviation of savings for a televisit to the doctor from the given data.

Using Excel,

=STDEV(number1, number2,....)

The standard deviation is found to be

$s = \$ 22.35$

The confidence interval is given by

$\text {confidence interval} = \bar{x} \pm MoE\\\\$

Where the margin of error is given by

$$ MoE = t_{\alpha/2}(\frac{s}{\sqrt{n} } ) $ \\\\$

Where n is the sample of 20 online doctor visits, s is the sample standard deviation and $t_{\alpha/2}$ is the t-score corresponding to a 95% confidence level.

The t-score is given by is

Significance level = α = 1 - 0.95 = 0.05/2 = 0.025

Degree of freedom = n - 1 = 20 - 1 = 19

From the t-table at α = 0.025 and DoF = 19

t-score = 2.093

So, the margin of error is

$MoE = t_{\alpha/2}(\frac{s}{\sqrt{n} } ) \\\\MoE = 2.093\cdot \frac{22.35}{\sqrt{20} } \\\\MoE = 2.093\cdot 4.997\\\\MoE = 10.46\\\\$

So the required 95% confidence interval is

$\text {CI} = \bar{x} \pm MoE\\\\\text {CI} = 71 \pm 10.46\\\\\text {CI} = 71 - 10.46, \: 71 + 10.46\\\\\text {CI} = (60.54, \: 81.46)\\\\$

Therefore, we are 95% confident that actual mean savings for a televisit to the doctor is within the interval of ($60.54 to $81.46)

7 0

3 years ago

What is the distance between (1, 3) and (5, 8)

katovenus [111]

I think you’d do (5,8) - (1,3) to get (4,5)

8 0

3 years ago

Read 2 more answers

There is a 15% discount on all items in a store. You buy a $12 shirt and $45 jeans. What will be your total cost?

Nina [5.8K]

Answer:

The total cost of the shirt and Jean's together with a 15% discount would be $48.45.

Step-by-step explanation:

if you at 12 and 45 you get 57 now if you multiply that by .15 which would be 15% you would get $48.45.

6 0

3 years ago

Read 2 more answers

If a pound of bread is worth 1.75 and a orange is worth 0.50 per pound. How many pounds of oranges have an equivalent cost to 3

Alexus [3.1K]

Answer:

C. 10.5 pounds

Step-by-step explanation:

The worth of 3 loaves of bread is 3 times that of one loaf:

3 × 1.75 = 5.25

You want the number of pounds of oranges (p) at 0.50 per pound that has this same worth:

0.50p = 5.25

p = 5.25/0.50 = 10.50

10.5 pounds of oranges have an equivalent cost to 3 loaves of bread.

5 0

3 years ago

Which deposit earns more interest, $250 at 6% per year, or $400 at 4% per year? show how you know.

cestrela7 [59]

Answer:

$400 at 4% per year

Step-by-step explanation:

because then you put 400 and use the formula of interest you can see which gives bigger

7 0

2 years ago

Read 2 more answers