A student selects 49 batteries from a population with a mean mass value of 72±7.0 g(uts). She measured a sample mean and obtained a value of 74±7.0 g (uts). Conduct aone-independent z-test to determine whether mass values are different at 0.05significance level. Hint: Use the formula for paired t-test to obtain zcalc.

Given: Population mean μ = 72 Population standard deviation σ = 7 Sample size n = 49 Sample mean X =…

Answered: A student selects 49 batteries from a…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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An article includes the accompanying data on compression strength (lb) for a sample of 12-oz aluminum cans filled with strawberry drink and another sample filled with cola. Beverage Sample Size Sample Mean Sample SD Strawberry Drink 10 535 24 Cola 10 559 15 Does the data suggest that the extra carbonation of cola results in a higher average compression strength? Base your answer on a P-value. (Use ? = 0.05.) State the relevant hypotheses. (Use ?1 for the strawberry drink and ?2 for the cola.) H0: ?1 − ?2 = 0Ha: ?1 − ?2 ≥ 0H0: ?1 − ?2 = 0Ha: ?1 − ?2 ≠ 0 H0: ?1 − ?2 = 0Ha: ?1 − ?2 < 0H0: ?1 − ?2 = 0Ha: ?1 − ?2 > 0 Calculate the test statistic and determine the P-value. (Round your test statistic to one decimal place and your P-value to three decimal places.) t = P-value = State the conclusion in the problem context. Reject H0. The data suggests that cola has a higher average compression strength than the strawberry drink.Reject H0. The…
The average age for licensed drivers in a county is µ = 41.6, σ = 12, and the distribution is approximately normal. A county police officer was interested in whether the average age of drivers receiving speeding tickets differed from the average age of the driving population. She obtained a sample of N = 16 drivers with speeding tickets. The average age for this sample was M = 34.4 and alpha = 0.05. calculate statistical power for this study.
The Amercian Water Works Association reports that the per capita water use in a single family home is 69 gallons per day. A new housing development agency had builders intall more efficient water fixtures and conducted a survey of residents. 36 residents responded and the sample mean water use was 64 galons with a SD of 8.8 gallons per day. At the 0.10 level of significance, is that enough evidence to conclude that these residents surveyed are using less water on average ?
A manufacturer is interested in the output voltage of a power supply used in a PC. Output voltage is assumed to be normally distributed, with standard deviation 0.25 V, and the manufacturer wished to test Hg: H = 8 against H1: u # 8, using n = 10 units. Statistical Tables and Charts (a) The critical region is 8.14. Find the value of a. Round the answer to 3 decimal places. a = 1 eTextbook and Media (b) Find the power of the test for detecting a true mean output voltage of 8.08 V. Round the answer to 3 decimal places. The power of the test is 1 eTextbook and Media
Given H0 : =μ23, Ha : ≠μ23, and =P0.029 . Do you reject or fail to reject H0 at the 0.01 level of significance? fail to reject H0 not sufficient information to decide reject H0
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The police chief selects a sample of 49 local police officers from a population of officers with a mean physical fitness rating of 72 ± 7.0 (μ±σ) on a 100-point physical endurance rating scale. He measures a sample mean physical fitness rating on this scale equal to 74. He conducts a one-independent sample z test to determine whether physical endurance increased at a .05 level of significance.
The Board of Transportation and Safety (BTS) wants to examine the safety mechanisms of A, B, and C-class cars. Samples of 10 cars for each class were used. The board members collect the pressure exerted overall on the driver’s body during an impact test. Assume alpha of 0.05. What is dfbetween = ? What is dfwithin = ? What is the critical test statistic: ? A B C 27 21 48 13 23 39 11 10 22 15 27 30 34 34 31 n(A) = 5 n(B) = 5 n(B) = 5 T(A)=100 T(B)=115 T(C)=170 SS(A)=86 SS(B)=135 SS(C)=151 What is the MSbetween=? What is the MSwithin=? What is the calculated test statistic? Given the values of your critical test statistic and calculated test statistic, do you reject the null?
X wi Q3/Answer the following question: 1- Prove that the M.P.V for value was measured several times represented weighted mean E-1xi wi X Ewi 2- Find the volume of cylinder with stander error if you have (r= 5± 0.05) (h= 15 m ±0.02m) (* Note V= har² ).
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