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Q1) Burning rates of 2 different solid-fuel propellants utilized in aircrew escape systems are being studied. It is known that both propellants have about same standard deviation of burning rate, that is σ1=σ2=3 centimeters per second. 2 random samples of n1=20 and n2=20 specimens are tested, sample mean burning rates are x bar 1=18 centimeters per second and x-bar2=24 centimeters per second.
a) Test hypothesis that both propellants have same mean burning rate. Utilize α=0.05. Compute the P value.
b) Create a 95% confidence interval on difference in means μ1-μ2. Determine the practical meaning of this interval.
At a large department store, the amount a shopper spent and the shopper's gender (male or female) were recorded. To determine if gender is useful in explaining the amount of money a shopper spends at the store we could
Solve the equations using linear algebra
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Examined the effect of body position on blood pressure
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If a blue ball is selected you win nothing. Let X be the amount that you win. The expected value of X and let the random variable X be a random number with the uniform density curve given below
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An SRS of 100 of a certain popular model car in 1993 found that 20 had a certain minor defect in the brakes. An SRS of 400 of this model car in 1994 found that 50 had the minor defect in the brakes. Let p1 and p2 be the proportion of all cars of t..
A recent census of a small town in Michigan showed that 60% of the residents are male, 20% have college degrees, and 15% are both male and college graduates.
Make use of Excel to determine the right-tail p-value.
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