A medical researcher claims that less than 24% of adults in a certain country are smokers. In a random sample of 250 adults from that country, 18% say that they are smokers. At the significance level, is there enough evidence to support the researcher’s claim? Find the p-value and interpret its meaning Decide whether to reject or fail to reject the null using the p-value approach. Make an interpretation of your decision in the context of the claim.

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Q: What specifically is used to decide whether to reject or fail to reject the null hypothesis? To…

A: Level of signicance is the pre-assigned value.

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A: +ve sign = 308-ve sign = 421ties = 30Total = 308+421+30        = 759significance level  0.05

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A: The data set for the sleep and no sleep group,SleepNo sleep14813986913117109910131212811111491312The…

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A: B Double-blinding

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A:

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A: Given,n=286x=24and α=0.01

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A: a. To find whether the proportion of pf working students has changed, the null and alternative…

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A:

Q: Assume that you plan to use a significance level of a = 0.05 to test the claim that p1 = P2. Use the…

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A: Given that  Sample size n =65 Favorable cases x =27 Sample proportion p^=x/n  =27/65 =0.4154 NOTE:-…

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A: Given median cost of a used car = $12000Total number of used cars in sample = n = 15Total number of…

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A: Given If the P-value of a hypothesis test is 0.103, what would your decision be when the level of…

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A: a)It is needed to check whether hours of sleep are independent of age.

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A: HypothesisThe P-value=0.27

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A: Assume that matched pairs of data from a poll of Internet users who were asked if they make travel…

Q: Assume that matched pairs of data from a poll of Internet users who were asked if they make travel…

A:

Q: Assume that matched pairs of data from a poll of Internet users who were asked if they make travel…

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Q: It is a statement that is accepted when the sample data does not provide sufficient evidence to…

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Q: Professors collected data consisting of eye color and gender of statistics students. Among 1056…

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Q: A genetic experiment involving peas yielded one sample of offspring consisting of 439 green peas and…

A: Given DataTotal peas(n) = green peas + yellow peas = 439 + 160 = 599

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A: This is two sample proportion test. and also two tailed test.

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A: Formula Used: χ2 = ∑i=1n(O-E)2E Eij = RT-CTN RT = Row Total CT = Column Total

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A: It is given that a sample of offspring consisting of 442 green peas in which 142 are yellow peas.

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Q: The null hypothesis usually represents the   a. preconceived ideas of the researcher.     b. status…

A: A null hypothesis is a type of hypothesis used in statistics that proposes that there is no…

Q: Activity 1.1 Look for a sample survey online. Copy five questions and identify what kind of survey…

A: Types of survey questions:

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Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.