All categories

3 years ago

Help me plsssssssssssss

Mathematics

1 answer:

Zinaida [17]3 years ago

7 0

Answer:

40mph

Step-by-step explanation:

(60mph+20mph)/2

You might be interested in

What is the mean and MAD of this data set?

Hitman42 [59]

Answer:

Mean:6

Mad:2.29

Step-by-step explanation:

7 0

3 years ago

3.3.4 practice: modeling: factoring ax2+bx+c

deff fn [24]

I think it should be x(ax +b) + c. Not sure though.

3 0

3 years ago

A random sample of 100 observations from a quantitative population produced a sample mean of 22.8 and a sample standard deviatio

natima [27]

Answer:

We conclude that the population mean is 24.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 24

Sample mean, $\bar{x}$ = 22.8

Sample size, n = 100

Alpha, α = 0.05

Sample standard deviation, s = 8.3

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 24\\H_A: \mu \neq 24$

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

Formula:

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

Putting all the values, we have

$z_{stat} = \displaystyle\frac{22.8 - 24}{\frac{8.3}{\sqrt{100}} } = -1.44$

We calculate the p-value with the help of standard z table.

P-value = 0.1498

Since the p-value is greater than the significance level, we accept the null hypothesis. The population mean is 24.

Now, $z_{critical} \text{ at 0.05 level of significance } = \pm 1.96$

Since, the z-statistic lies in the acceptance region which is from -1.96 to +1.96, we accept the null hypothesis and conclude that the population mean is 24.

7 0

3 years ago

How do you solve n - 8 > 5

sergiy2304 [10]

n > 13

Step-by-step explanation:

n-8> 5=

Add 8 to both sides.

n > 5 + 8

Add 5 and 8 to get 13.

n > 13

________________________________

Please mark as brainliest

6 0

2 years ago

Read 2 more answers

Keith needed 100 feet of rope to make a border at a fundraising event his youth grew was holding at a local park. Someone gave h

Alexeev081 [22]

The rope is not long enough a meter is roughly 3 feet 3 inches totalling out to 98 feet and a few inches

6 0

3 years ago

Read 2 more answers