Until recently, an average of 60 out of every 100 patients has survived a particularly severe infection. When a new drug was administered to patients from a random sample, 12/15 survived. (10 pts) a. Please identify the statistical test to be used. b. Please compute the test statistic and p-value. c. Does the new drug appear to be effective? Why or why not?

Q: tried on 20 prospective employees and produces a sample standard deviation of 8 points. Are scores…

A: Given data : sample size, n = 20 population standard deviation,σ= 5 sample…

Q: When the sample size is over 30, when would the t test be used instead of normal distribution?

A: A t test will be used, when the population standard deviation is unknown and either the population…

Q: Under what conditions can the mean of the sample be treated as a value that is from a population…

A: From the above data  under what conditions can the mean of the sample be treated as a value that is…

Q: A population has a standard deviation of 18. On average, how much differece should exist for a…

A:

Q: A research center claims that 24​% of adults in a certain country would travel into space on a…

A: Givensample size(n)=800p^=0.27α=0.10

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A: The quartile is a term used in statistics that divides the statistical observation into 4 divisions.…

Q: Given a distribution with a mean of 90 and a standard deviation of 10, what is the probability of…

A: Given Information: μ=90 σ=10 x1=85 x2=110

Q: The student senate at a large university feels that their seniors have a debt much less than $3,150,…

A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will…

Q: For Division I athletes the NCAA uses a sliding scale, based on both core GPA and the combined…

A:

Q: Do the "Height in Inches" data set adhere to the empirical rule? Would you conclude that| the…

A: (b). Check whether the data of “Height in Inches” follows approximately normal distribution: The…

Q: Suppose the mean fasting cholesterol of teenage boys in the United States is μ = 175 mg/dL with σ =…

A: Given,  μ = 175 mg/dL σ = 50 mg/dL x¯= 195 mg/dL n = 39

Q: When testing a hypothesis about a single mean, if the sample size is 51 and the population standard…

A: From the provided information, Sample size (n) = 51 The population standard deviation is known.

Q: If a distribution is normal with μ = 60 and σ = 15, what is the z score of 40?

A:

Q: A repeated-measures, a matched-subjects, and an independent-measures study all produce a t statistic…

A: Given study produces a t statistic with df=16.

Q: A premed student in statistics class wants to test the claim that the mean body temperature is less…

A: Given information- Population mean, μ = 98.6℉ Sample size, n = 12 Significance level, α = 0.05 We…

Q: For a population of leghorn chickens, the mean number of eggs laid per chicken is 7.3 with standard…

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Q: In a survey of women in a certain country (ages 20 - 29), the mean height was 66.5 inches with a…

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A: We have to find test statistics.

Q: Rashid is 84 inches tall. If the height of males in the United States is nor- mally distributed with…

A: Height of Rashid = x = 84 inches. Mean =  70 Standard deviation = 4 The z-score is given by z-score…

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A: From the provided information,

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A:

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A:

Q: The police chief selects a sample of 49 local police officers from a population of officers with a…

A: Given n=49, x̄=74, μ=72, σ=7 , ɑ=0.05  Test the hypothesis at ɑ=0.05

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A: The null hypothesis: H0:μ=36 And the alternative hypothesis: Hα:μ≠36 The test statistic is t=x-μ0sn

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Q: Consider the experiment of tossing a fair coin three times and observing the number of heads that…

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Q: A z-score that is 6 points below the mean corresponds to a z = -2.00. What is the populations'…

A:

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A:

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A:

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A: State the hypotheses.

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Q: State the null and alternative hypotheses for the statistical test described below. Testing to see…

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Q: All other conditions being equal, does a larger sample size increase or decrease the corresponding…

A: The formula to calculate z statistic is given as,

Q: A researcher wanted to determent mine if there was a significant difference in fat content between…

A: For the above problem we should use t-test for difference of means.

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A: Z score is the distance of data point from its mean in terms of its standard deviation. It is…

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A:

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A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

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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.