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daser333 [38]
3 years ago
7

Third grade homework 1.3 rounding to the nearest

Mathematics
2 answers:
Vikentia [17]3 years ago
4 0
The answer to the nearest of 1.3 is 1.0
schepotkina [342]3 years ago
3 0
The answer is 1.) because 3 would always round to 0
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Which statement correctly compares the parking rates for each lot?
cupoosta [38]

Answer: O Lot B costs $0.01 more

Step-by-step explanation: I think it’s O Lot B costs $0.01 more per hour than Lot A

3 0
3 years ago
An automobile club reported that the average price of regular gasoline in a certain state was ​$2.61 per gallon. The following d
laila [671]

Answer:

2.618-2.98\frac{0.078}{\sqrt{15}}=2.56    

2.618+2.98\frac{0.078}{\sqrt{15}}=2.68    

So on this case the 99% confidence interval would be given by (2.56;2.68)

Step-by-step explanation:

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 represent the sample mean for the sample  

\mu population mean (variable of interest)

s represent the sample standard deviation

n represent the sample size  

Solution to the problem

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 mean and the sample deviation we can use the following formulas:  

\bar X= \sum_{i=1}^n \frac{x_i}{n} (2)  

s=\sqrt{\frac{\sum_{i=1}^n (x_i-\bar X)}{n-1}} (3)  

The mean calculated for this case is \bar X=2.618

The sample deviation calculated s=0.078

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

df=n-1=15-1=14

Since the Confidence is 0.99 or 99%, the value of \alpha=0.01 and \alpha/2 =0.005, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.005,14)".And we see that t_{\alpha/2}=2.98

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

2.618-2.98\frac{0.078}{\sqrt{15}}=2.56    

2.618+2.98\frac{0.078}{\sqrt{15}}=2.68    

So on this case the 99% confidence interval would be given by (2.56;2.68)    

5 0
3 years ago
Please help me this is about to be overdue!!!
Hoochie [10]

I think three might be the correct answer

3 0
3 years ago
A number is 2 hundreds more than 355. What is the number?
Charra [1.4K]
If the number is 200 more than 355, then your number is 555.

How did I get that?
355 + 200 = 555
6 0
3 years ago
Samantha's age is 3 years more than half her uncle's age. If her uncle's age is z years, which of the following expressions best
melisa1 [442]

Answer:

See below

Step-by-step explanation:

z  = uncle's age

1/2z +3   = Sam's age

4 0
2 years ago
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