A doctor claims that less than 30% of all persons exposed to a certain amount of radiation will feel any ill effects.If in a random sample only 1 of 19 persons exposed to such radiation felt any ill effects,test Ho:p=0.30 against H1:p<0.30 at the 0.05 level of significance

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

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A: Given : Here, By conservative method df = 11 Corresponding critical value is : t=±2.201 By Formula…

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A: Correct answer is  (A)

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Q: In a previous year, 61% of females aged 15 and older lived alone. A sociologist tests whether this…

A: np(1-p)= 400×0.6×0.4=96&gt;10  Hence, the sample size is under 5%op population size and consider as…

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A: We have to find critical value.

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A: The hypothesized proportion is 0.53.

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…

Q: determine with 95% confidence that his drug avoids diagnosis of insomnia as a side-effect?

A: Solution: Given that, Sample of size,n=65 Sample mean ,X_bar=6.6 Population s.d, sigma=1.1…

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A: ANSWER: For the given data,

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

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

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Q: clinical​ trial, 29 out of 853 patients taking a prescription drug daily complained of flulike…

A: The null and alternative hypotheses are: Ho: p = 0.029Ho:p=0.029 Ha: p &amp;gt; 0.029Ha:p&gt;0.029…

Q: ​If, in a sample of n=20 selected from a normal​ population, X=55 and S=20​, what are the critical…

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Q: 3) A certain country claims that their COVID-19 vaccine is more than 80% effective. In their…

A: The null hypothesis is H0: p = 0.80, and the alternative hypothesis is Hα:p&gt;0.80

Q: In a clinical trial, 19 out of 861 patients taking a prescription drug daily complained 1.9% of this…

A: Given that, Because np0(1-p0) = 861×0.019×(1-0.019)=16.04818≈16.0&gt;10, the sample size is less…

Q: A standardized IQ test is known to be normally distributed and has μ=100 and σ=10. there is a common…

A: Given that, A standardized IQ test is known to be normally distributed and has μ=100 and σ=10. there…

Q: According to a certain government agency for a large country, the proportion of fatal traffic…

A: Given information: According to a government agency for a large country, the proportion of fatal…

Q: In a random sample of  320  cars driven at low altitudes,  50  of them exceeded a standard of  10…

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Q: Without using software, how would you estimate the number of degrees of freedom for this problem

A: It is given that Sample size for treatment group n1 = 22 Sample size for control group n2 = 24

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Q: A common characterization of obese individuals is that their body mass index is at least 30 [BMI =…

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Q: The NAEP considers that a national average of 283 is an acceptable performance. Using α = .05, run a…

A: Introduction: Denote μ as the true average score in 2019.

Q: A hypothesis test is performed to determine if the proportion of all six packs of seltzers sold in a…

A: Given : n=152 P=0.50 Test statistic (z) =2.60 P value =0.0047

Q: In a clinical​ trial, 29 out of 853 patients taking a prescription drug daily complained of…

A: Claim : more than 2.9​% of this​ drug's users experience flulike symptoms as a side effect