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Likurg_2 [28]
3 years ago
12

When the sample size and sample standard deviation remain the same, a 99% confidence interval for a population mean, µ will be n

arrower than the 95% confidence interval for µ?
Mathematics
1 answer:
motikmotik3 years ago
5 0
A 99% confidence interval will be wider compared to a 95% confidence interval. This is because while you don't know what the true value of mu is, you are more confident that the parameter is in the interval.

In essence, you are casting a wider net which leads to the higher level of confidence. Imagine if there was a 100 mile stretch of straight land, and somewhere on this line was a special rock that you are looking for. You would be 100% confident if you said "the rock is somewhere on that piece of land", and less confident the more you shrunk the interval.
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Are the ratios 6:2 and 2:6 equivalent?
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no

Step-by-step explanation:

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A lathe is set to cut bars of steel into lengths of 6 centimeters. the lathe is considered to be in perfect adjustment if the av
Nitella [24]
The hypothesis testing for this problem is:
a. The hypothesis for this problem are:
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Alternative: Ha: μ≠6
 
b. Test
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4 0
3 years ago
The Rodriguez family and the Hill family each used their sprinklers last summer. The water output rate for the Rodriguez family'
brilliants [131]

Answer:

x = 23.33 hr    Rodriguez sprinkler

y  = 26.66 hr   Hill sprinkler

Step-by-step explanation: INCOMPLETE QUESTION

Requiered information:

the water output rate for both sprinkler families

We assume : Rodriguez family   40 lts/hr

                      Hill family   35 lts/ hr

Total water output  1900 lts

and total combined hours working is 50 hr

Let call  "x"  time in hours sprinkler of Rodriguez family worked

and "y" time in hours sprinkler of  Hill  family worked

Then if total output was 1900 lts

40*x  +  35*y  = 1900    and   x  +  y  =  50

We have a two equation system, solving

y  =  50 - x     ⇒     40*x  +  35 * ( 50 - x )

40x  =  1750 -  35x

75 x  =  1750        ⇒    x  = 1750/75          ⇒    x = 23.33 hr

and   y  =  50  -  23.33     ⇒   y  =  26.66 hr

6 0
3 years ago
. (8 X 1) + (5 X 160) + (9 x 10) =
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Step-by-step explanation:

4 0
3 years ago
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Is 9/36 a rational number?
AURORKA [14]

Answer:

yes, it is

Step-by-step explanation:

a rational number is any number that can be expressed as a quotient or fraction

5 0
3 years ago
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