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jok3333 [9.3K]
2 years ago
5

PEASE HELP ASAP!!!!!!!

Mathematics
2 answers:
Veseljchak [2.6K]2 years ago
8 0
Solve using step by step equations
kiruha [24]2 years ago
4 0
If u solve using the step by step equation process u will get the answer
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supervisor records the repair cost for 25 randomly selected dryers. A sample mean of $93.36 and standard deviation of $19.95 are
Simora [160]
<h2><u>Answer with explanation:</u></h2>

The confidence interval for population mean (when population standard deviation is unknown) is given by :-

\overline{x}-t^*\dfrac{s}{\sqrt{n}}< \mu

, where n= sample size

\overline{x} = Sample mean

s= sample size

t* = Critical value.

Given : n= 25

Degree of freedom : df=n-1=24

\overline{x}= \$93.36

s=\ $19.95

Significance level for 98% confidence interval : \alpha=1-0.98=0.02

Using t-distribution table ,

Two-tailed critical value for 98% confidence interval :

t^*=t_{\alpha/2,\ df}=t_{0.01,\ 24}=2.4922

⇒ The critical value that should be used in constructing the confidence interval = 2.4922

Then, the 95% confidence interval would be :-

93.36-(2.4922)\dfrac{19.95}{\sqrt{25}}< \mu

=93.36-9.943878< \mu

=93.36-9.943878< \mu

=83.416122< \mu

Hence, the 98% confidence interval for the mean repair cost for the dryers. = 83.4161

4 0
3 years ago
Carlos wrote three numbers between 0.33 and 0.34. What numbers could he have written?
kiruha [24]
There is an infinite number of numbers between 0.33 and 0.34
for example, 0.331, 0.332, 0.3321213323, 0.3333333, 0.3336778, etc.
There should be more to the question.
5 0
2 years ago
Tell weather the given value is a solution of the inequality
natta225 [31]
Yes, 8 is a solution

r - 3 ≤ 9; r  = 8

plug in 8 to r

(8) - 3 ≤ 9
5 ≤ 9 (true)

hope this helps
4 0
3 years ago
Read 2 more answers
True or false
boyakko [2]

Answer:


Step-by-step explanation:


8 0
2 years ago
Read 2 more answers
Which equation can be used to verify that 534 – 68 = 466?
IgorC [24]

Answer:

466 + 68

Step-by-step explanation:

We can easily check a subtraction problem with an addition problem.

Calculate the sum of the subtracted and the difference. If the sum is equal to the minuend in the original subtraction problem, the answer is correct.

Minuend - Subtrahend = Difference

466 + 68 = 534

The statement '534 – 68 = 466' is correct.

Hope this helps.

6 0
2 years ago
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