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3 years ago

15

If a fair-number cube with sides numbered from 1 to 6 is tossed 240 times, approximately how many times would the fair-number cu

be land on a number that is greater than 2?

1 answer:

LenKa [72]3 years ago

8 0

It wouls be greater 50times

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You measure 46 textbooks' weights, and find they have a mean weight of 77 ounces. Assume the population is normally distributed

andre [41]

Using the z-distribution, the 99% confidence interval for the true population mean textbook weight is (72.37, 81.63).

<h3>What is a z-distribution confidence interval?</h3>

The confidence interval is:

$\overline{x} \pm z\frac{\sigma}{\sqrt{n}}$

In which:

$\overline{x}$ is the sample mean.

z is the critical value.

n is the sample size.

$\sigma$ is the standard deviation for the population.

In this problem, we have a 99% confidence level, hence $\alpha = 0.99$ , z is the value of Z that has a p-value of $\frac{1+0.99}{2} = 0.995$ , so the critical value is z = 2.575.

The other parameters are given as follows:

$\overline{x} = 77, \sigma = 12.2, n = 46$

Hence the lower and upper bound of the interval are given, respectively, by:

$\overline{x} - z\frac{\sigma}{\sqrt{n}} = 77 - 2.575\frac{12.2}{\sqrt{46}} = 72.37$

$\overline{x} + z\frac{\sigma}{\sqrt{n}} = 77 + 2.575\frac{12.2}{\sqrt{46}} = 81.63$

More can be learned about the z-distribution at brainly.com/question/25890103

#SPJ1

3 0

2 years ago

Ali drove 754 miles in 13 hours.

Rudiy27

Answer:

464 miles

Step-by-step explanation:

Divide.

She drove 754 miles in 13 hours. So that means her rate(her speed) was 58 mph.(754/13= 58)

Multiply.

So if she were to drive at the same rate for only 8 hours that would be 464 miles.( 58 x 8= 464)

8 0

3 years ago

andrey2020 [161]

Answer:

the third distribution

7 0

3 years ago

A quadratic function has a line of symmetry at x = –3 and a zero at 4.

vesna_86 [32]

I have my hints here on how to solve the questions one and two:

<span>Q1: Just find the distance from -3 to 4. That's 7.

Q2: It is 7 units to the left of -3. Subtract 7 from -3. That's -10
</span>
I hope my answer has come to your help. God bless and have a nice day ahead!

7 0

3 years ago

Read 2 more answers

Given the first type of plot indicated in each pair: which of the second plots could not always be generated from it? a. dot plo

Elenna [48]

Answer:

C

Step-by-step explanation:

Dot plot is usually in the form of stem & leaf. The only difference is that, stem& leaf presents the actual values while dot plot usually represent the value in dots. Hence, we can easily generate dot plot from stem & leaf!

For (a) dot plot and box plot, dot plot presents all the data while box plot presents only the five-num statistics, namely:

1. minimum

2. 1st quartile (Q1)

3. median

4. 3rd quartile (Q3)

5. Maximum

And outliers, if any!

Thus, dot plot cannot directly generate box plot

For (b). Histogram and stem & leaf. Although both usually help us understand the skewness of data distribution, however, histogram deals with frequency distribution (counts of number of occurrence) and plotted on the intervals and stem&leaf list the values.

For (d). Even though dot plot shoots up and down like the histogram, the content is different. In dot plot, it is the actual value represented in dots. But in histogram, it is the frequency distribution of the class intervals.

3 0

3 years ago