what is the value of x? please I need step by step solution

2021-12-28

what is the value of x? please I need step by step solution

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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 2021-08-14

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

asked 2021-09-12

Given the proportion $\frac{a}{b}=\frac{8}{15}$ , what "ratio" completes the equivalent proportion $\frac{a}{8}$

asked 2022-07-30

A family paid $24,750 ,as a down payment for a home. If this represents 15% of the price of the home, find the price of the home.

The price of the home is ? $

The price of the home is ? $

asked 2021-09-14

Solve the following proportion: $\frac{2}{2a-1}=\frac{3}{5(a-2)}$

A ratio of 42 to 12 is the same as a ratio of ? to 2

Solve the following proportion:$\frac{x-3}{4}=\frac{x+2}{2}$

Solve the following equation:$8-\frac{1}{2}M=15$

Solve the following equation:$9-(x+5)=2x-(4-x)$

A ratio of 42 to 12 is the same as a ratio of ? to 2

Solve the following proportion:

Solve the following equation:

Solve the following equation:

asked 2022-09-03

A car rental company charges a daily rate of $28 plus $0.40 per mile for a certain car. Suppose that you rent that car for a day and your bill (before taxes) is $208.

How many miles did you drive?

How many miles did you drive?

asked 2021-08-20

To find the Gear ratio of the Driving gear, 40 teeth. driven gear, 5 teeth.