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miskamm [114]
2 years ago
5

How to find z statistic for test?

Mathematics
1 answer:
alexandr402 [8]2 years ago
3 0
The z-score is calculated by the formula (x - mu)/sigma, where x is the value, mu is the mean, and sigma is the standard deviation.
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Truck tire life is normally distributed with a mean of 60,000 miles and a standard deviation of 4,000 miles. what is the probabi
olasank [31]
To solve for the P(54,000≤x≤66000) we proceed as follows:
z-score=(x-μ)/σ
μ-60000
σ-4000
thus:
when x=66,000
z-score=(66000-60000)/4000=1.5
P(z≤1.5)=0.9332
when x=54000
z=(54000-60000)/4000
z=-1.5
P(z≤-1.5)=0.0668
thus
 P(54,000≤x≤66000) 
=P(z≤1.5)-P(z≤-1.5)
=0.9332-0.0668
=0.8664

Answer: 0.8664
8 0
3 years ago
Which answer represents the domain of the logarithmic function given below? F(x) = log8x
MrRissso [65]

Answer:

C. x>0

Step-by-step explanation:

Given: f(x)=log(8x)

To find the domain of a logarithmic function, we need to take the argument, 8x, and set it greater to zero. This is because an argument of a logarithmic function cannot be zero or negative.

8x>0

x>0

So since x is greater than zero, we have just found out our domain:

Interval Notation: (0, ∞)

Set Notation: {x|x>0}

3 0
2 years ago
Read 2 more answers
Jason is planning to travel to Philadelphia to Orlando. His destination is 1,010 miles one way. If he flies, he can get a one-wa
Marysya12 [62]
A is the answer because it costs $295 for the ticket and $271.9 in total if he drives in car. So therefore driving is less expensive.
3 0
3 years ago
Find the product of the given polynomials. <br> (5x + 8 – 6r) (4 + 2r – 7)<br><br><br>​
Inessa05 [86]

Answer:

-12r² + 10xr - 15x + 34r - 24

Step-by-step explanation:

1. Organize it, variables first - as well as adding constants such as 4 and -7

(5x - 6r + 8) (2r - 3)

2. Start by multiplying the 5x by (2r - 3), then -6r, followed by 8

(10xr - 15x) + (-12r^2 + 18r) + (16r - 24)

3. Simplify

10xr - 15x - 12r² + 18r + 16r - 24

4. Order by greatest to smallest factorial

-12r² + 10xr - 15x + 18r + 16r - 24

5. Combine like variables

-12r² + 10xr - 15x + 34r - 24

6 0
2 years ago
What is the least common multiple of 3,7,9
KengaRu [80]


The least common multiple is 63.

Explanation: 63 is the least number that 3 7 and 9 can go into evenly. Therefore, it is the least common multiple.

8 0
3 years ago
Read 2 more answers
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