A manufacturer of aspirin claims that the proportion of headache sufferers who get relief with just two aspirins is 63.4%. What is the probability that in a random sample of 490 headache sufferers, no more than 289 obtain relief? Remember to use the continuity correction and calculate z-scores to at least 3 decimal places. Give probabilities to 4 decimal places. Probability 0.0239

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Q: Approximately 10% of students have a composite score below what level

A: If X is the composite score of the students, then we need to search for a x, such that P[X≤x]=0.1.

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Q: Hans has scored 75, 73, and 93 on his previous three tests. What score does he need on his next test…

A: Person H has scored 75, 73, and 93 on his last three tests.

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Q: Of the 300 visitors polled,O liked to ski or snowboard. (Type a whole number.)

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Q: µ = 43 and s = 8, what is the z score ? Margret X = 43, z = Katie X = 55, z = Dorinda X = 47, z =…

A: Given that  µ = 43 and s = 8 Formula for Z-score  Z=(X-µ)/s

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Q: a. A statistics class is made up of 18 men and 22 women. What percentage of the class is male? b. A…

A: We have to solve problems using formula  P(event) = no. Of favorable outcomes / total outcomes

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Q: ts) Suppose that 2% of all children have tuberculosis (TB). When a child who has TB is given the…

A: Let A1: The child has TB A2: The child does not have TB From given information P(A1)=0.02 P(A2)=0.98

Q: Ms. Eisenman wanted to know her average student’s score on the most recent chapter test and what…

A: Ms. Eisenman wanted to know her average student’s score on the most recent chapter test and what…

Q: A student's statistics test is 18 questions and worth 30% of their overall grade. The student is…

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Q: Sam did a survey and found out that 92% of all seniors are ready to graduate and leave for college.…

A: From the provided information, 92% of all seniors are ready to graduate and leave for college that…

Q: What is p value ?

A: The​ P-value is the probability of observing difference in the sample statistic this high or higher…

Q: What is the power of a test?

A: Power of test is the probability of rejecting the null hypothesis when it is false. Therefore, the…

Q: A poll done for Newsweek found that 15% of Americans have seen or sensed the presence of an angel. A…

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Q: A popular blog reports that 45% of college students log in to Instagram on a daily basis. The Dean…

A: Given  p=45%, n=203, X=106 , level of significance ɑ=0.06 Note: According to Bartleby guidelines…

Q: A popular blog reports that 45% of college students log in to Instagram on a daily basis. The Dean…

A: Given that:Sample size, Number of students logging in daily (Number of favorable cases), Level of…

Q: you have two results for p= technically which one is the correct reference?

A: We have to find the value of p.

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A: Given that, When taking a 28 question multiple choice test, where each question has five possible…

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Q: Jose has scored  79 ,  84 , and  85  on his previous three tests. What score does he need on…

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Q: Test the claim that the proportion of people that own lawn mowers is more than 59%. If you fail to…

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Q: 2. Chronic pain has led many people in our country seeking pain-relief to become addl company want…

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Q: If Gena's score is 85, the class average is 82, and the SD is 4, what is Gena's Z-score?

A: If Gena's score is 85, the class average is 82, and the SD is 4, what is Gena's Z-score?

Q: Researchers conducted a study to determine whether there were significant differences in graduation…

A: Given that, probability, p= 96% = 0.96 So q= 1-p= 1-0.96= 0.04 And sample size is n= 13 So X~…

Q: Using the before-and-after brand perception scores in the table below and assuming that the…

A: Before After D (D-dbar)^2 47 57 10 25 52 54 2 9 67 72 5 0 31 37 6 1 62 60 -2 49 59 68 9…

Q: The principal of Paul Revere High School bragged that his 2016 graduating class of 1500 students…

A: Given:Number of categories = 3Level of significance (α) = 0.05.

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A: Defines that p is true proportion of all students, who have a part-time job.

Q: Jason scored a 83% out of 100 and his perantile rank was 12 Rogns scored a 85% out of 100 his car…

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