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Leona [35]
3 years ago
15

Is this answer right?? If not please help.

Mathematics
1 answer:
pickupchik [31]3 years ago
8 0
I think your are right
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I'm a survey of 200 employees, 65% agreed that the management of the cafeteria should be changed. If the confidence interval is
suter [353]

Answer:

Step-by-step explanation:

Confidence interval for population proportion is expressed as

Sample proportion ± margin of error

Margin of error = z × √pq/n

Where

z represents the z score corresponding to the confidence level

p = sample proportion. It also means probability of success

q = probability of failure

q = 1 - p

From the information given,

Sample proportion, p = 65/100 = 0.65

q = 1 - 0.65 = 0.35

n = 200

To determine the z score, we subtract the confidence level from 100% to get α

α = 1 - 0.95 = 0.05

α/2 = 0.05/2 = 0.025

This is the area in each tail. Since we want the area in the middle, it becomes

1 - 0.025 = 0.975

The z score corresponding to the area on the z table is 1.96. Thus, the z score for a confidence level of 95% is 1.96

Margin of error = 1.96√(0.65)(0.35)/200

Margin of error = 0.066 = 6.6%

The maximum boundary of the interval is

0.65 + 0.066 = 0.716

5 0
3 years ago
Plz someone help me
makvit [3.9K]
Let me break this down a little bit:

Joe has a savings account with $422 in it.

He also has a credit card, meaning that whatever he spends on his credit card, he'll have to pay back later.

So far, he has purchased $524 worth of merchandise.

If you subtract $422 from $524 it will equal =$122 he owes.

Therefore, Joes overall balance is reflected as a POSITIVE number.

The $122 dollars is represented as what he owes which would be a NEGATIVE number.

The ultimate answer to this question is POSITIVE.

Hope this helps! :)
7 0
3 years ago
If the average speed of a car is 45 km/hr, how far can it travel in 40 min?
alexandr1967 [171]

Answer:

30 kilometers

Step-by-step explanation:

40 min=2/3 hour

2/3*45=30

3 0
3 years ago
I got this wrong I need help please
statuscvo [17]
<h3>Answer: Choice A) </h3>

No, the piecewise graph is NOT a function because it does NOT pass the vertical line test.

The vertical line test is where we try to pass a line through more than one point on the curve. If it is not possible to do this, then the graph is said to "pass the vertical line test".

In this case, the given graph fails the vertical line test. Look at something like x = -2. We can draw a vertical line through here to pass through more than one point. One point is on the upside-down V shape, and the other point is on the parabolic shape. Plugging x = -2 into this leads to more than one y outputs.

A function is only possible if any valid x input (from the domain) leads to exactly one output y value (in the range).

8 0
3 years ago
What is the median of this set of values?
saw5 [17]

Answer:

D.8

Step-by-step explanation:

In order to find median you need to find the middle number of the set by crossing each one out until you get to the middle. I hope this helps!

6 0
3 years ago
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