tragikovas
2022-09-13
Answered

Find the unknown term of the proportion: 0,9/15=0,3/x

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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 2021-09-06

Define what is meant by the term ratio. Compare and contrast rates, proportions, and percentages. Give an example of each one

asked 2022-01-21

How do you simplify $24:34?$

asked 2021-09-10

TD Canada Trust discovers that the estimated proportion of clients defaulting on a loan, if the interest rate is lower than$15\mathrm{\%}$ , is 0.34. They also discover that the estimated proportion of clients defaulting on a loan, given the interest is greater than or equal to $15\mathrm{\%}$ , is 0.52.

a) What is the odds ratio of defaulting given the interest rate is greater than or equal to$15\mathrm{\%}$ relative to the interest rate is lower than $15\mathrm{\%}$ ? Interpret this odds ratio.

b) If we were to analyze this data using the following logistic regression model, what are the estimates of$\beta}_{0$ and $\beta}_{1$ ? Showyourwork.

l$\mathrm{log}(\frac{p}{1}-p)={\beta}_{0}+{\beta}_{1}x$

(Where p is the probability of defaulting on a loan and x is an indicator variable that is 1 when the interest rate is greater than or equal to$15\mathrm{\%}$ and 0 when the interest rate is less than $15\mathrm{\%}$ )

a) What is the odds ratio of defaulting given the interest rate is greater than or equal to

b) If we were to analyze this data using the following logistic regression model, what are the estimates of

l

(Where p is the probability of defaulting on a loan and x is an indicator variable that is 1 when the interest rate is greater than or equal to

asked 2022-06-02

The radius of a circle with area a is approximately square root of a/3. the area of a circular mouse pad is 51 square inches. estimate its radius to the nearest integer

asked 2021-08-14

The given proportion is thue or false. Given: $\frac{19}{8}=\frac{14}{6}$

asked 2022-03-19

**Directions**:Rewrite the given proportion according to the property indecated in the table.Show the correct process for each property (10points)

**GIVEN PROPORTION: **15/c = 4/d

Cross - multiplication Property | |

Alternation Property | |

Inverse Property | |

Addition Property | |

Subtraction Property |