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Leya [2.2K]
3 years ago
12

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

Mathematics
1 answer:
Vinvika [58]3 years ago
4 0

Answer:

The point estimate for population mean is 8.129 Mpa.

Step-by-step explanation:

We are given the following in the question:

Data on flexural strength(MPa) for concrete beams of a certain type:

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

a) Point estimate of the mean value of strength for the conceptual population of all beams manufactured

We use the sample mean, \bar{x} as the point estimate for population mean.

Formula:

Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}

\bar{x} = \dfrac{\sum x_i}{n} = \dfrac{219.5}{27} = 8.129

Thus, the point estimate for population mean is 8.129 Mpa.

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50

Step-by-step explanation:

4 0
3 years ago
Sean used the $1,200 he got from his graduation party to open a savings account. If the account earns 1% interest each month and
Greeley [361]

Answer:

\$1,920

Step-by-step explanation:

we know that

The simple interest formula is equal to

A=P(1+rt)

where

A is the Final Investment Value

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r is the rate of interest  

t is Number of Time Periods

in this problem we have

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substitute in the formula above

A=\$1,200(1+0.01*60)

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6 0
3 years ago
6.
Softa [21]

Answer:

lower your mortgage interest rate

Step-by-step explanation:

The higher your credit score, the __lower your mortgage interest rate__.

Because the higher your credit score, the less risk you represent for a lender, so it will most likely grant you a lowest rate for your mortgage/loan.

The "lower your savings interest rate " is not the answer because savings interest rates are not related to the credit score...

"higher your car loan rate " and "higher risk you are to a creditor " are consequences of a low credit score.

5 0
3 years ago
Read 2 more answers
8. Which of the following is true of the commutative property under subtraction? A. 10 – 9 = 10 – 9 B. 10 + 9 = 9 + 10 C. 10 – 9
raketka [301]
D - the commutative property shoes you cannot flip those numbers without changing the value
3 0
3 years ago
Read 2 more answers
WHAT IS -(-2z+5y) HELP MY HOMEWORK IS DUE IN 50 MINUTES PLEASE
vampirchik [111]

Answer:

\boxed{ \bold{ \huge{ \boxed{ \sf{2z - 5y}}}}}

Step-by-step explanation:

\sf{ - ( - 2z + 5y)}

Distribute negative ( - ) sign through the parentheses

\sf{( - ) \times ( - 2z)  + ( - ) \times (5y)}

\dashrightarrow{ \sf{2z   + ( - 5y)}}

\dashrightarrow{ \sf{2z - 5y}}

Hope I helped!

Best regards! :D

7 0
4 years ago
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