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A: Given that: Number of successes, x=244 Sample size, n=260 Confidence level = 0.95
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A: Expected value (E) =Total frequency 5
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Q: A research group conducted an extensive survey of 3182 wage and salaried workers on issues ranging…
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A: Given , Sample sizes : n1 =n2 = 200 Sample proportions : p^1 = 0.26 , p^2 = 0.23 Claim : There is a…
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A: Percentile : Percentile is the number such that certain percentage of data fall below that number.…
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Q: ) Does it appear that martial status and age group are i independent? Justify your answer.
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A: From the provided information, Sample size (n) = 339 From which 7 suffer from sleep apnea that is…
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A: We have to find we can support claim or not.
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A: Given that: Sample size, n=50 No. of successes, x=11 Population proportion, p=0.30
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A: Given: n1 = 200 n2 = 200 P1 = 29200 = 0.145 P2 = 24200 = 0.12 Formula used: Z-test =…
Q: Is the national crime rate really going down? Some sociologists say yes! They say that the reason…
A: Here from the given information we conduct Z test for proprtion.
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A: Claim : the percentage of commercial truck drivers who suffer from sleep apnea is not 4.1%
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A: given data, claims that 60% of students who take her class feel more enriched after completing…
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Q: Is the national crime rate really going down? Some sociologists say yes! They say that the reason…
A: Solution: Given information: n= 35 Sample size of arrests x= 26 arrests males aged 15 to 34 years…
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Q: In June of 1997, Australians were asked if they thought unemployment would increase, and 52%…
A: Given Information : In June of 1997, Australians were asked if they thought unemployment would…
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A: Given The data is as follows: α=0.01 Population proportion, p=0.70 The claim is that the pop.…
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A: We have to find test statastics.
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Q: Sleep apnea is a condition in which the sufferers stop breathing momentarily while they are asleep.…
A: Givenx=19n=308p^=19308=0.0617α=0.05
Q: A research group conducted an extensive survey of 3181 wage and salaried workers on issues ranging…
A:
Q: Can You Tell a Story About Your Parents? In a study, young adults in the US were asked to recall a…
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Suppose that 10% of weightlifters use banned substances, that a weightlifter who uses banned substances tests positive for them 97% of the time, and that a weightlifter who does not use banned substances tests positive for them 5% of the time.
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- I need help with these two questions?To better understand how husbands and wives feel about their finances, Money Magazine conducted a national poll of 1010 married adults age 25 and older with household incomes of $50,000 or more (Money Magazine website, December 14, 2014). Consider the following example set of responses to the question, “Who is better at getting deals?” Who Is Better? Respondent I Am My Spouse We Are Equal Husband 278 127 102 Wife 290 111 102 Round your answers to four decimal places, if necessary. a. Develop a joint probability table and use it to answer the following questions. Respondent I am My spouse We are equal Total Husband Wife Total b. Constract the marginal probabilities for Who Is Better (I Am, My Spouse, We Are Equal). Comment. P(I) = P(S) = and P(E) = “SelectI AmMy SpouseWe Are EqualItem 15 ” is the most likely response. c. Given that the respondent is a husband, what is the probability that he feels he is better at getting deals than…Dorinda is in second grade. She asks 6 of her classmates if they like to wear friendship bracelets. Four of her classmates said yes. Based on her findings, would it be reasonable to assume that about 2/3 of the pupils at her school (which has kindergarten through fifth grade) would also like to wear friendship bracelets? Why or why not?
- Consider a study that surveyed 50 people to rate how much they like their job. Ratings mean 1 for “hate my job”, 2 for “dislike my job”, 3 for “neutral”, 4 for “like my job” and 5 for “love my job”. This survey found that • 8 people hated their job• 14 people disliked their job • 15 people were neutral• 9 people liked their job, and • 4 people loved their job. (1) Write a description of the random variable describing this survey(2) Write a probability distribution describing the probability of the outcomes of this event. (3) What probability of people like their job?(4) Calculate the expected rating.We want to know if students with bronchitis at 5 years have more cough symptoms when they grow up. Out of 290 children with Bronchitis at Age 5, 32 of them has cough symptoms at Age 12. Out of 970 children with no Bronchitis at Age 5, 43 of them has cough symptoms at Age 12. Is the cough symptom equally prevalent in both populations?Sleep apnea is a condition in which the sufferers stop breathing momentarily while they are asleep. This condition results in lack of sleep and extreme fatigue during waking hours. A current estimate is that 9.7 million out of the 312.7million Americans suffer from sleep apnea, or approximately 3.1%A safety commission is concerned about the percentage of commercial truck drivers who suffer from sleep apnea. They do not have any reason to believe that it would be higher or lower than the population’s percentage. To test the claim that the percentage of commercial truck drivers who suffer from sleep apnea is not 3.1%, a simple random sample of 406commercial truck drivers is examined by a medical expert, who concludes that 55 suffer from sleep apnea. Does this evidence support the claim that the percentage of commercial truck drivers who suffer from sleep apnea is not 3.1%?Use a 0.05 level of significance. Step 3 of 3 : Draw a conclusion and interpret the decision.
- In a survey of families in which both parents work, one of the questions asked was, “Have you refused a job, promotion, or transfer because it would mean less time with your family?” A total of 200 men and 200 women were asked this question. “Yes” was the response given by 29% of the men and 24% of the women. Based on this survey, can we conclude that there is a difference in the proportion of men and women responding “yes” at the 0.05 level of significance?A friend of yours tells you that they heard that 65% of all college athletes end up losing a finger or toe in their college athletic career. You're highly skeptical of this, but your not sure if that percentage is an over exageration or an under exageration. You survey 101 former student-athletes and find that 60 of them lost a digit during their college athletic career. Is this enough evidence to conclude that the true percentage of student-athletes that lose a digit during their collegiate career is really different from 65%?A research group conducted an extensive survey of 2940 wage and salaried workers on issues ranging from relationships with their bosses to household chores. The data were gathered through hour-long telephone interviews with a nationally representative sample. In response to the question, "What does success mean to you?" 1470 responded, "Personal satisfaction from doing a good job." Let p be the population proportion of all wage and salaried workers who would respond the same way to the stated question. How large a sample is needed if we wish to be 95% confident that the sample percentage of those equating success with personal satisfaction is within 1.6% of the population percentage? (Hint: Use p ≈ 0.50 as a preliminary estimate. Round your answer up to the nearest whole number.) workers
- I need help answering this questionA researcher wants to conduct an experiment to determine which environment is best suited for studying - a library, in one's own room, or outside. A total of 30 university students volunteer to participate in the experiment. The researcher believes that gender has an effect on the results. What are the treatments in the experiment?Español According to previous studies, 10% of the U.S. population is left-handed. Not knowing this, a high school student claims that the percentage of left-handed people in the U.S. is 12%. The student is going to take a random sample of 900 people in the U.S. to try to gather evidence to support the claim. Let p be the proportion of left-handed people in the sample. Answer the following. (If necessary, consult a list of formulas.) (a) Find the mean of p. 0.12 (b) Find the standard deviation of p. X 5 (c) Compute an approximation for P(p≤0.12), which is the probability that there will be 12% or fewer left-handed people in the sample. Round your answer to four decimal places. A 27
