A hypothesis test was performed to decide whether the mean number of words spoken per day by men is fewer than for women. αα = 0.05 and p = 0.02. If a man and a woman are randomly selected there is a 2% chance that the man will speak fewer words than the woman on that day.

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A: We want to test the hypothesis Given  X1=215, n1=250 X2=260, n2=340

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A: Given: p1^=4101000p2^=4201200

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Q: Step 6 of 6 :   Make the decision to reject or fail to reject the null hypothesis.

A: The sample proportion for first sample is, p^1=x1n1=20210=0.0952 The sample proportion for second…

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Q: When a data set has one or two values that are much higher than all of the others which of our 3…

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A: Solution: Given information: n= 110 Sample size of traffic fatalities x= 49 traffic fatalities…

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A: cell phone no cell phone 100 154 101 129 93 129 101 71 87 128 120 123 142 126 115…

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A: The Question asked is : Question: Based on the result and the choice of your X, suggest whether Dr…

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A: Cell Phone (CP) No Cell Phone (NCP) 113 118 116 162 120 131 110 169 125 106 89 117 126…

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A: The sample size is 108, and population proportion is 0.36. Checking condition:…

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A: Given information: μ=1.50x¯=1.35s=0.50n=9α=0.10

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A: Here, population standard deviation is not known. Hence, it is appropriate to use one sample t-test.…

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Q: A certain financial services company uses surveys of adults age 18 and older to determine if…

A: a. Null Hypothesis: H0:p1=p2 Alternative Hypothesis: Ha:p1-p2≠0 Test Statistic: From the given…

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A: Here 2 proportion of Z test statistics is applicable.   ===========================

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A: Step 2: n1=135 n2=175 x1=14 x2=8 The sample proportion of p^1 is, p^1=x1n1    =14135   =0.104

Q: A recent study investigated whether cell phone users experience separation anxiety when they cannot…

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Q: Y1 + Y2 + 2 or iz = Y2 2

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Q: The manufacturer of a new racecar engine claims that the proportion of engine failures due to…

A: Solution: Given information: n1= 115 Sample size of new engine x1= 12 new engine failed n2= 120…

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Q: A recent study investigated whether cell phone users experience separation anxiety when they cannot…

A: Standard error of the difference between two means is a useful descriptive statistic in confidence…

Q: The manufacturer of a new racecar engine claims that the proportion of engine failures due to…

A: Given data : x1= 14.0 n1= 135 x2= 8.0 n2= 175

Q: If a treatment is expected to increase scores among a population with u= 20, then the alternative…

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Q: Of a random sample of 100 college students, 35 expected to achieve a higher standard of living than…

A: Since, we need to compare lower standard of living with higher standard of living. Therefore, out of…

Q: A researcher wants to test the hypothesis that college students weigh less on average than the…

A: Note: Thank you for the question. Since the complete question is missing, we have checked whether…