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Snowcat [4.5K]
3 years ago
5

standard error describes a measure of the variability for the means of samples taken from a population. true or false.

Mathematics
2 answers:
lesya692 [45]3 years ago
5 0
The answer is true for this question 
anastassius [24]3 years ago
5 0
Ummmm, i am pretty sure its true, sorry if i am wrong but last time i checked it was true.
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Cube root of b to the 27 power​
TiliK225 [7]

\sqrt[3]{b^{27}}=\sqrt[3]{(b^9)^3}=b^9

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Thursday afternoon 80 kids visited the library. Of those students 60 checked out a book before they left. What percentage of the
Fittoniya [83]

Answer48

Step-by-step explanation:

80 times 60 equals 4800 divided by 100 equals 48

3 0
3 years ago
  Find the value of r, if K is between J and L.  if JK = 6r, KL = 3r, and JL = 27
Ne4ueva [31]
        6r            3r
J_______K_______L
--------------27------------

JK + KL = JL
6r + 3r = 27
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5 0
3 years ago
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There are 40 marbles in a bag if 14 if the marbles are red what percent of the marbles in the bag are red
Neporo4naja [7]
\frac{14}{40} \times 100\%=\frac{7 \times 2}{20 \times 2} \times 100\%=\frac{7}{20} \times 100\%=7 \times \frac{100}{20} \%=7 \times 5\%=35\%

35% of the marbles are red.
4 0
3 years ago
The director of a state agency believes that the average starting salary for clerical employees in the state is less than ​$35 c
MrRissso [65]

Answer:

There is not enough evidence to conclude that  average starting salary for clerical employees in the state is less than ​$35,000 per year.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 35,000 dollars per year

Sample mean, \bar{x} = 34,700 dollars per year

Sample size, n = 100

Alpha, α = 0.10

Population standard deviation, σ = 3,500 dollars per year

First, we design the null and the alternate hypothesis

H_{0}: \mu = 35,000\text{ dollars per year}\\H_A: \mu < 35,000\text{ dollars per year}

We use one-tailed z test to perform this hypothesis.

Formula:

z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }

Putting all the values, we have

z_{stat} = \displaystyle\frac{34700 - 35000}{\frac{3500}{\sqrt{100}} } = -0.8571

Now, z_{critical} \text{ at 0.10 level of significance } = -1.28

Since,  

z_{stat} > z_{critical}

We fail to reject the null hypothesis and accept the null hypothesis.

Thus, there is not enough evidence to conclude that  average starting salary for clerical employees in the state is less than ​$35,000 per year.

3 0
3 years ago
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