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gladu [14]
3 years ago
5

C/8 = - 12 please help fast

Mathematics
2 answers:
Brums [2.3K]3 years ago
6 0

Answer:

x = -96

Step-by-step explanation:

Sloan [31]3 years ago
5 0
X=-84

Divide the 8 in uu get -4
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The manager of Petco, a nationwide chain of pet supply stores, wants to study characteristics of the customers, particularly the
shutvik [7]

Answer:

The 95% confidence interval would be given by (19.141;23.538)  

Step-by-step explanation:

1) Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

\bar X=21.34 represent the sample mean for the sample  

\mu population mean (variable of interest)

s=9.22 represent the sample standard deviation

n=70 represent the sample size  

2) Confidence interval

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

In order to calculate the critical value t_{\alpha/2} we need to find first the degrees of freedom, given by:

df=n-1=70-1=69

Since the Confidence is 0.95 or 95%, the value of \alpha=0.05 and \alpha/2 =0.025, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.025,69)".And we see that t_{\alpha/2}=1.994

Now we have everything in order to replace into formula (1):

21.74-1.994\frac{9.22}{\sqrt{70}}=19.141    

21.74+1.994\frac{9.22}{\sqrt{70}}=23.538

So on this case the 95% confidence interval would be given by (19.141;23.538)    

3 0
3 years ago
What times 3 equals 4?
Mice21 [21]

Answer:

heres your answer 1.3333

7 0
2 years ago
What is an written expression for 20+5×9
BartSMP [9]

Answer:

Five times nine plus twenty

Step-by-step explanation:

Just remember the order of operations... multiplication and division are done first before adding and subtracting.

7 0
3 years ago
What is the answer to the problem 16g +20h with the distributed property applied​
e-lub [12.9K]
36 g I’m pretty sure that’s the answer
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3 years ago
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How to solve 6x+3=5x+10
laila [671]
6x+3=5x+10 \\\\ 6x-5x=10-3 \\\\ \boxed{x=7}
7 0
3 years ago
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