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Triss [41]
3 years ago
15

Suppose that a company claims that its air fresheners last 23 days, on average. You take many large samples, and find, each time

, that the mean number of days of the sample is outside the 95% confidence interval. Based on this information alone, which of the following is probably not the mean number of days that the company's air fresheners last?
A. 19
B. 21
C. 17
D. 23
Mathematics
2 answers:
dlinn [17]3 years ago
5 0

Answer:

23

Step-by-step explanation:


Snowcat [4.5K]3 years ago
5 0

Answer:

Option D is the answer.

Explanation:

A company claims that its air fresheners last 23 days, on average. Many large samples are taken each time it is found that the mean number of days of the sample is outside the 95% confidence interval.

This implies:

23\times0.95=21.85

So, below 21.85 is the probable mean number of days that the company's air fresheners last.

Therefore, 23 is not the mean number of days that the company's air fresheners last.

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If the average grade on an English class rose from 70 to 85 what is the approximate percent increase ?
mixer [17]

Answer: The approximate percent increase is 121.42857%. This is a rounded value. To get this, first you would need to find out which increased and in what direction. Of course, the 70 turned into an 85. So you can divide 85 by 70 and receive a number. Then in whatever form you found it, decimal, fraction, or even percent straight away, ensure the value is a percentage.

70 -> 85

85/70

About 1.21 [decimal]

1.21 x 100 = 121 [add the %]

121% [rounded]


4 0
3 years ago
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Why is the answer A? Plz explain.
emmasim [6.3K]

Answer:


Step-by-step explanation:

the answer cannot be 5. Why? Because the minimum will occur when 12 and 5 point in opposite directions like both are on the x axis pointing to 0 from the east and pointing to zero coming from the west.

12 - 5 = 7

You cannot get a result less than that.

4 0
3 years ago
Find the midpoint of JK if J(-7. -5) and K(-3,7).
qaws [65]

Answer:

( − 5 , 1 )

Step-by-step explanation:

Use the midpoint formula to find the midpoint of the line segment.

7 0
3 years ago
Please help!!!! Can’t figure it out.
OleMash [197]

Answer:

A) x = 12

Step-by-step explanation:

if its a right angle? then the angle in total is 90 degrees,

subtract the 35 from 90 to get 55 degrees,

4x + 7 = 55 solve this

4x = 48

x = 12

8 0
2 years ago
Plz help me with this problem it’s not that hard at all !!
Brums [2.3K]

Answer:

43x-19y+74

hope this helps!!:)

Step-by-step explanation:

3 0
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