9 - A survey conducted in a city revealed that 25% of the people do sports. 8 people are randomly selected. Find the variance of people known to exercise. A) 6.5 B) 3,5 C) 1.5 D) 4.5 E) 2,5

Q: 4 The blood group distribution in a certain country is A: 41%, B: 9%, AB: 4%, O: 46%. For a randomly…

A: 4. Given information: P(A)=41% P(B)=9% P(AB)=4% P(O)=46% a) The odds on having blood group A is,…

Q: In Exercises 9–12, assume that 50 births are randomly selected. Use subjective judgment to describe…

A: Subjective judgement:If the probability is close to 0, then the occurrence of the event is…

Q: A sample was taken of the salaries of four employees from a large company. The following are their…

A:

Q: The table shows a random sample of musicians and how they learned to play their instruments. Gender…

A: P(musician is a female AND had private instructor)

Q: A national nursing organization is lobbying congress for sunding to hire more nurses nationwide. One…

A: Here sample size n=9

Q: 19) A manufacturer of golf equipment wishes to estimate the number of left- handed golfers. How…

A: We have find confident proportion. .

Q: A study is conducted to estimate the average difference in bus ridership for a large city during the…

A:

Q: What is the probability of randomly selecting a sample of n = 36 with a value greater than M = 63…

A: given: M=63 n=36 mean=60 standard deviation = 12

Q: . A college claims that 70% of students receive financial aid. Suppose that 4 students at the…

A: It is given that 70% of students receive financial aid. Consider that X is a random variable,…

Q: (a) From the sample of 175 branches summarized above: (i) What proportion of branches are…

A:

Q: The following are the resultof the survey made by the quality control department in a certain…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…

Q: 3. Teachers teaching practical research are interested in knowing what study techniques their…

A:

Q: A survey asked 3494 randomly selected high school seniors about their computer use. Among the 1,734…

A: We have given that,  Favorable cases (males use computers for three or more hours a day) = (X) = 677…

Q: In an experiment on pea-breeding Mendel obtained the following frequencies of seed : 315 round and…

A:

Q: In a survey of 460 drivers from the South, 409 wear a seat belt. In a survey of 340 drivers from the…

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Q: In a survey of 180 females who recently completed high school, 80% were enrolled in college. In a…

A: There are two samples which are females and males. The random variable college enrollees follow…

Q: The type of household for the U.S. population and for a random sample of 411 households from a…

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Q: of the random variable K repres envoys of the random variable B.

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Q: A random sample of nine custom homes provided the following data on size and price. » denotes size…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: A population of N = 200 scores has u = 40 and o = 4. What is the population variance? O 33 O 8 0 9 O…

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Q: 12. Researchers at VCU studied fatal auto accidents between cars in which one has an air bag and the…

A: The population proportion by the sample proportion is calculated using the formula where is the…

Q: n a study of vehicle ownership, it has been found that 30% of U.S. households do not own a vehicle,…

A: Expected value (E) = 195* p

Q: For an analysis of variance comparing six treatment means with a separate sample of n = 7…

A: From the provided information, Number of treatment (k) = 6 Number of participants in each treatment…

Q: Nabisco, the maker of Chips Ahoy! Cookies claims that there are at least 1000 chocolate chips in…

A: Given : n = 42

Q: 7. A poll of 60 students selected at random at State University found that 12 were in favor of…

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Q: A university dean is interested in determining the proportion of students who receive some financial…

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Q: a. Compute the mean of the following sample values: 5, 9, 4, 10. b. Show that E(x - X) = 0, %3D 3.

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Q: A climatologist is interested in comparing the frequency of cloud cover in Thunder Bay and Sudbury.…

A: Level of measurement is used to understand the nature of the variable. There are four type of level…

Q: In SPSS , for a one sample t test, to find your p value for a one tailed test, multiply the p value…

A: Given statement, for a one sample t test, to find your p value for a one tailed test, multiply the p…

Q: Use the CLT again to determine the probability that the mean taxable wages in James' sample of 50…

A: It is given that mean is 28.29 and the standard deviation is 33.493.

Q: (18) Of 50 buildings in an industrial park, 12 have electrical code violations. If 10 buildings are…

A: Given : Of 50 buildings in an industrial park , 12 have electrical code violations  If 10 buildings…

Q: 2. Consider the weights (in Ibs.) of 9 Mathematics students. Weight 116 205 175 138 250 205 180 175…

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Q: A USA Today poll of 1600 children aged 8 – 12 found that 56% watch online videos every day. Let p̂…

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Q: A machine that produces a major part for an airplane engine is monitored closely. In the past, 10%…

A: For 95% confidence level we have to find sample size for given margin of error.

Q: A study was commissioned to find t the residents in certain town. The s random sample of 114…

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Q: f, in a random sample of 200 ​items, 30 are​ defective, what is the sample proportion of defective​…

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Q: In a city, 70% of the people prefer Candidate A. Suppose 30 people from this city were sampled. (a)…

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Q: 3. A researcher estimates that the average height of buildings in terms of the number of storey in…

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Q: Of all the pupils in a particular school, 45 % go to school by bus. In a random sample of 30 pupils,…

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Q: A random sample is one on which the

A:

Q: A record store owner finds that 15,0% of customers entering her store make a purchase. One morning…

A: Given,n = 188P = 0.15SE = ?

Q: In Exercises 9–12, assume that 50 births are randomly selected. Use subjective judgment to describe…

A: Given that,Subjective judgment:If the probability is close to 0, then the occurrence of the event is…

Q: 4) For sample space from n(u,0), the variance of mean is o.

A: 4. Given that the sample space is selected from nμ,σ2.

Q: A university administrator wishes to know if there is a difference in average starting salary for…

A: (a) Hypothesis: H0:μ1-μ2=0 H1:μ1-μ2≠0 The test is two tailed. (b) Test statistic:…

Q: a.) Is the distribution of commissions positively skewed, negatively skewed, or symmetrical? b.)…

A: we are given that  mean = 1385                              median = 1330…

Q: In Exercises 9–12, assume that 50 births are randomly selected. Use subjective judgment to describe…

A: In subjective judgment, one can have the following things.If the probability is close to 0, then the…

Q: 2. Classify each sample as simple random, stratified, cluster, or convenience. a) A researcher for…

A: Hey, since there are multiple subparts posted, we will answer first three subparts. If you want any…

Q: In Exercises 9–12, assume that 50 births are randomly selected. Use subjective judgment to describe…

A: Let event A denote the number of girls.

Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.