what is the null and alternative hypothesis?
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A: Defines that p is true proportion of the number of on-line purchases of footwear made during all of…
Q: In a survey of working parents (both parents working), one of the questions asked was "Have you…
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Q: None
A: Step 1: Children who were given antibiotics before they were one year old (for example, for ear…
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Q: A random sample of 113 felons convicted of nonviolent crimes in a state prison system completed a…
A: Given , n= 113 , x = 58 Here One prop Z test is applicable
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A: Solution: Given information: n= 300 Sample size of clients k= 3 Categories P1= 0.35 Probability of…
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A: Solution: The Minitab output for one proportion is given.
Q: Is the national crime rate really going down? Some sociologists say yes! They sat that the reason…
A: H0:P =0.70H1:P≠0.70
Q: If Tectronic is asked for a second presentation, what is the probability that the company will get…
A: here define events company get order = O asking for second presentation = S p(O) = 0.60 p(O') =…
Q: A (hypothetical) experiment is conducted on the effect of alcohol on perceptual motor ability. Ten…
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Q: An auto shop wants to examine the proportion of customers that have to retur after an appointment.…
A: Given that Sample sizes n1=402 , n2=319 Sample proportion p1^=0.224 , p2^=0.251
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A: Observational study: In observational study, the individuals of the study are observed by the…
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Q: In 2016, the New York Times reported that the average American spent 50 minutes per day on Facebook,…
A: From the given information, AverageFacebook=50 Average reading, exercising, or actually socializing…
Q: A company surveyed adult Americans about their consumer debt. The article reported that 48% of…
A: Solution-:Let, p_1-be the proportion of Gen Xers who do not pay off their credit cards each monthand…
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A: Proportions of confidence interval: The following is the formula for confidence interval of the…
Q: ng 100d insecurity, which is having a disruption of food intake because of lack of money or other…
A: It is needed to test, whether the researcher’s sample was consistent with reports.
Q: A research group conducted an extensive survey of 3093 wage and salaried workers on issues ranging…
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Q: A random sample of n1 = 148 people ages 16 to 19 were taken from the island of Oahu, Hawaii, and 14…
A: a) The level of significance, denoted by α, is defined as the probability of incorrectly rejecting…
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A: we know that applications of the paired sample t-test include case-control studies or…
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A: From the given information we conduct chi squared test.
Q: Suppose a survey of 899 college students who were asked about their smoking behavior. Of the…
A: Given Information : Suppose a survey of 899 college students who were asked about their smoking…
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Q: A random sample of n1 = 154 people ages 16 to 19 were taken from the island of Oahu, Hawaii, and 11…
A: The given data is as follows: For island of Oahu, The sample size n1 is 154 and the number of high…
Q: A study sponsored by the American Savings Education Councilt included data from a survey of 1752…
A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…
Q: In a survey of working parents (both parents working), one of the questions asked was "Have you…
A: From the provided information,
Q: (h) What is the value of the sample statistic?
A: p1 = 0.324 p2 = 0.182p-value = 0.002
Q: As many as 20% of all Americans contract influenza each year. A sample of 400 randomly selected…
A: The pis the proportion of all Americans who contract influenza each year p=0.20 The sample size is…
Q: According to a study on the effects of smoking by pregnant women on rates of asthma in children, for…
A: n= 319 no of children developed asthma = x = 82Population proportion of children who developed…
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Q: . Find a 90% confidence interval for p. (Round your answers to three decimal places.) lower limit…
A: Given data,n=2982x=1608Sample proportion p=x/n =1571/2929 =0.5364z-value at 90% Confidence is…
Q: A company surveyed adult Americans about their consumer debt. The article reported that 48% of…
A: Solution-: Let, p_1-be the proportion of Gen Xers who do not pay off their credit cards each month…
Q: Do well-rounded people get fewer colds? A study on the Chronicle of Higher Education was conducted…
A: Obtain the 99% confidence interval for the difference in the two population proportions. The 99%…
Q: You may need to use the appropriate appendix table or technology to answer this question Fewer young…
A: In year A, 61.9% of people under 20 years who were eligible had a driver's license.In year B, 49.7%…
Q: The General Social Survey is an annual survey given to a random selection of about 1500 adults in…
A: (a)Given:Source of variationDegrees of freedom (df)Sum of Squares (SS)Mean Square (MS)F…
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Q: A bank classifies its customer as either good or bad credit risks. Based on historical data, the…
A: Let A denotes the event that a random customer turns out to be a good credit risk and B denotes the…
Q: e side effects. Do the data presented in the table provide enough evidence to infer that the…
A: (Please note that the proportion of side effects of headache is stated as 25%, which leads to…
Q: A random sample of n1 = 157 people ages 16 to 19 were taken from the island of Oahu, Hawaii, and 12…
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Q: (a-1) Specify the decision rule. (A negative value should be indicated by a minus sign. Round your…
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Q: The impact of a low-calorie diet on laboratory mice's longevity is being investigated by a medical…
A: Given the data as Group E Group F 900 1037 907 905 751 1023 833 988 920 1078 787 1011…
Q: In 2016, the New York Times reported that the average American spent 50 minutes per day on Facebook,…
A: Let x¯1 and x¯2 be the sample mena time spent on Facebook and Other activities respectively. x¯1=50…
Q: In 1990, 58% of Americans 18 years old and older reported they have a great deal of concern…
A: Introduction: Here, the hypothesized proportion is given as 58% or p = 0.58. The researchers collect…
Q: A auto shop wants to examine the proportion of customers that have to return after an appointment.…
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- From the U.S. Census Bureau’s American Community Survey in 2019 it was found that 33.13%of United States residents over the age of 25 had an educational attainment of a bachelor’sdegree or higher. In the District of Columbia, the percentage of residents over the age of 25 whohad attained a bachelor’s degree or higher was 59.67%. An investigator for the U.S. CensusBureau took a random sample of seven residents from the District of Columbia and asked themtheir highest educational degree they had obtained. a) Verify that the sample from the District of Columbia satisfies the conditions of thebinomial experiment. Write one sentence to check each requirement in context of theinvestigation.b) Assuming the sample from the District of Columbia is a binomial experiment, build theprobability distribution in a single table and include the table in your solutions. You maypresent this table horizontally or vertically and leave the probabilities unrounded. Thereare two possible ways to do this: To…According to a study on the effects of smoking by pregnant women on rates of asthma in their children, for expectant mothers who smoke 20 cigarettes per day, 22.2% of their children developed asthma by the age of two in the US. A biology professor at a university would like to test if the percentage is different in another country. She randomly selects 319 women who only deliver one child and smoke 20 cigarettes per day during pregnancy in that country and finds that 82 of the children developed asthma by the age of two. In this hypothesis test, Do the hypothesis test. Use a level of significance of a = 0.05; Use the unrounded values in Excel to find the answers for #3 and #4 1. This is an example of 2. Find the standard error. 3. Find the z value. Question 10 V a hypothesis test.Some scientists believe that the sickle-cell trait lowers the risk of developing malaria. To explore this belief, 398 children in Africa were tested for the sickle-cell trait and malaria. The results are presented in Table 1 Test, at the 5% level of significance, whether there is an association between the sickle- cell trait and malaria. Step 1: Step 2: Step 3: Step 4: Step 5: Step 6:
- A random sample of n1 = 148 people ages 16 to 19 were taken from the island of Oahu, Hawaii, and 14 were found to be high school dropouts. Another random sample of n2 = 125 people ages 16 to 19 were taken from Sweetwater County, Wyoming, and 5 were found to be high school dropouts. Do these data indicate that the population proportion of high school dropouts on Oahu is different (either way) from that of Sweetwater County? Use a 1% level of significance.A random sample of n1 = 157 people ages 16 to 19 were taken from the island of Oahu, Hawaii, and 12 were found to be high school dropouts. Another random sample of n2 = 129 people ages 16 to 19 were taken from Sweetwater County, Wyoming, and 6 were found to be high school dropouts. Do these data indicate that the population proportion of high school dropouts on Oahu is different (either way) from that of Sweetwater County? Use a 1% level of significance. (a) What is the level of significance? What is the value of the sample test statistic? (Test the difference p1 − p2. Do not use rounded values. Round your final answer to two decimal places.) (c) Find (or estimate) the P-value. (Round your answer to four decimal places.)A random sample of n1 = 148 people ages 16 to 19 were taken from the island of Oahu, Hawaii, and 14 were found to be high school dropouts. Another random sample of n2 = 125 people ages 16 to 19 were taken from Sweetwater County, Wyoming, and 5 were found to be high school dropouts. Do these data indicate that the population proportion of high school dropouts on Oahu is different (either way) from that of Sweetwater County? Use a 1% level of significance. I need help with sketching, (d) and (e)
- Suppose we are interested in the risk of peripheral neuropathy among persons with diabetes. To study this relationship, we identify 100 persons with a history of diabetes. At an initial examination, three of those 100 persons were found to have peripheral neuropathy. Five years later, the group was reexamined and 12 additional persons were found to have peripheral neuropathy. Based on that information, which of the following is closest to the five- year risk of peripheral neuropathy in this group of patients? А. О.03 В. О.07 С. О.12 D. 0.15 E. 0.17A manufacturer of laptop computers claims that only 1% of their computers are defective. In a sample of 600 computers, it was found that 3% were defective. If the proportion of defectives were really only 1%, there would be than 1 chance in 1000 of getting such a large proportion of defective laptops in the sample. Is there statistically significant evidence against the manufacturer's claim? Why or Why not?Frq styled response
- Based on information from Harper's Index, 37 out of a random sample of 100 adult Americans who did not attend college believe in extraterrestrials. However, out of a random sample of 100 adult Americans who did attend college, 47 claim that they believe in extraterrestrials. Does this indicate that the proportion of people who attend college and who believe in extraterrestrials is higher than the proportion who did not attend college? (a) State the hypotheses in plain language. (b) Fill in the table below, then enter this table in the left side of the Rossman-Chance applet. No college College Total Believe in ETs 84 Did not believe in ETs 116 Total 100 100 200 (c) Compute the point estimate for the difference in the proportion believing in extraterrestrials between those not attending college and those attending college. Pne – Pe = (d) Complete at least 1000 simulations in the Rossman-Chance app 2 and report your findings below. (For help with the applet, refer to the e "Using the…In an article published in 2012 at Telegraph.co.uk, Warranty Direct gave engine failure rates for a variety of car brands based on their database of UK direct consumer warranties. The following are known: ● Hondas failed at a rate of 1 in 344. ● Fords failed at a rate of 1 in 80. ● Audis failed at a rate of 1 in 27. Suppose Hondas account for 20% of sales at a particular dealer, Audis 30%, and Fords 50%. Assuming the engine failure rates apply to these vehicles. Determine the probability that a randomly selected vehicle from this dealer will experience engine failure.In a 2018 Poll 447 out of 486 supported universal background checks for all gun sales in the U.S. In a similar poll from 2015, 276 of 321 interviewed supported universal background checks. Is this significant evidence that the percent of the population that supports universal background checks in the U.S. has decreased during this time?