ka1leE
2021-08-13
Answered

To compare and contrast ratios and rates.

You can still ask an expert for help

oppturf

Answered 2021-08-14
Author has **94** answers

Calculation:

The ratio and rates are quite similar. A ratio is a relationship or comparison of two numbers. A ratio is used to compare two number with similar units.

For example, the ratio of boys and girls in a class. If there are 25 boys and 32 girls in a class then the ratio of boys to girls in that class is given by

While the term rates is used to compare two numbers with different units.

For example, a person can walk 6 miles in 2 hour, then the rate of his walking will be give by

asked 2021-05-14

Consider the accompanying data on flexural strength (MPa) for concrete beams of a certain type.

$\begin{array}{|ccccccc|}\hline 11.8& 7.7& 6.5& 6.8& 9.7& 6.8& 7.3\\ 7.9& 9.7& 8.7& 8.1& 8.5& 6.3& 7.0\\ 7.3& 7.4& 5.3& 9.0& 8.1& 11.3& 6.3\\ 7.2& 7.7& 7.8& 11.6& 10.7& 7.0\\ \hline\end{array}$

a) Calculate a point estimate of the mean value of strength for the conceptual population of all beams manufactured in this fashion.$[Hint.\text{}?{x}_{j}=219.5.]$ (Round your answer to three decimal places.)

MPa

State which estimator you used.

$x$

$p?$

$\frac{s}{x}$

$s$

$\stackrel{~}{\chi}$

b) Calculate a point estimate of the strength value that separates the weakest$50\mathrm{\%}$ of all such beams from the strongest $50\mathrm{\%}$ .

MPa

State which estimator you used.

$s$

$x$

$p?$

$\stackrel{~}{\chi}$

$\frac{s}{x}$

c) Calculate a point estimate of the population standard deviation ?.$[Hint:\text{}?{x}_{i}2=1859.53.]$ (Round your answer to three decimal places.)

MPa

Interpret this point estimate.

This estimate describes the linearity of the data.

This estimate describes the bias of the data.

This estimate describes the spread of the data.

This estimate describes the center of the data.

Which estimator did you use?

$\stackrel{~}{\chi}$

$x$

$s$

$\frac{s}{x}$

$p?$

d) Calculate a point estimate of the proportion of all such beams whose flexural strength exceeds 10 MPa. [Hint: Think of an observation as a "success" if it exceeds 10.] (Round your answer to three decimal places.)

e) Calculate a point estimate of the population coefficient of variation$\frac{?}{?}$ . (Round your answer to four decimal places.)

State which estimator you used.

$p?$

$\stackrel{~}{\chi}$

$s$

$\frac{s}{x}$

$x$

a) Calculate a point estimate of the mean value of strength for the conceptual population of all beams manufactured in this fashion.

MPa

State which estimator you used.

b) Calculate a point estimate of the strength value that separates the weakest

MPa

State which estimator you used.

c) Calculate a point estimate of the population standard deviation ?.

MPa

Interpret this point estimate.

This estimate describes the linearity of the data.

This estimate describes the bias of the data.

This estimate describes the spread of the data.

This estimate describes the center of the data.

Which estimator did you use?

d) Calculate a point estimate of the proportion of all such beams whose flexural strength exceeds 10 MPa. [Hint: Think of an observation as a "success" if it exceeds 10.] (Round your answer to three decimal places.)

e) Calculate a point estimate of the population coefficient of variation

State which estimator you used.

asked 2021-09-14

Given expression is,

$\frac{12}{20}=\frac{18}{30}$

We need to determine whether the ratios are equal.

We need to determine whether the ratios are equal.

asked 2022-04-30

asked 2021-12-11

To calculate: the total of stamps in the collection and the number of stamps from U.S. in the collection.

Given information:

There are 15 stamps from Canada and they are$\frac{3}{11}$ of the total collection.

Given information:

There are 15 stamps from Canada and they are

asked 2021-12-17

What is 120% of 50?

asked 2021-08-18

To find:

The given rate 78 bushels of fruit from 12 trees as a unit rate.

The given rate 78 bushels of fruit from 12 trees as a unit rate.

asked 2020-10-26

292 Parents wre asked if they have a headache. 67% said yes. What is the margin of error?