What is the value of the lower quartile? 2 2.5 3 6

If you have a test average of 92 and a standard deviation of 1.8, you generally do well on tests.

MrRa [10]

Is that it is think it is 118

4 0

3 years ago

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What is the value of the expression below? 0.72/0.36*2

Tanya [424]

Answer:

Step-by-step explanation:

0.72/0.36 x 2

0.72/0.72

1

I'm always happy to help :)

8 0

3 years ago

Consider the following hypothesis test: H 0: 20 H a: < 20 A sample of 60 provided a sample mean of 19.5. The population stand

viva [34]

Answer:

We reject the null hypothesis and accept the alternate hypothesis. Thus, it be concluded that the population mean is less than 20.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 60

Sample mean, $\bar{x}$ = 19.5

Sample size, n = 60

Alpha, α = 0.05

Population standard deviation, σ = 1.8

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 20\\H_A: \mu < 20$

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

$z_{stat} = \displaystyle\frac{19.5 - 20}{\frac{1.8}{\sqrt{60}} } = -2.151$

Now, $z_{critical} \text{ at 0.05 level of significance } = -1.64$

Since,

$z_{stat} < z_{critical}$

We reject the null hypothesis and accept the alternate hypothesis. Thus, it be concluded that the population mean is less than 20.

5 0

3 years ago

Find f(3) for f(x) = 1/2(4)^x A. 8 B. 32 C. 6 D. 64

Elza [17]

1/2 (4)^3

1/2 x 64

32

7 0

3 years ago

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(SUPER EASY) ILL GIVE BRAINLIEST TOO. just answer all the questions you know.

wolverine [178]

Answer:

what is the question

Step-by-step explanation:

5 0

2 years ago