8 12 15 17 P(X) 8 1 3 5 P(X) 0.35 0.25 0.22 0.12 2 3 4 0.18 5 0.02 P(X) 5. 0.15 0.25 0.36 0.04 almu
Q: 1.The National Academy of Science reported that 45% of research in mathematics is published by US…
A:
Q: (a) If you make α too big (e.g., α = 0.2 (you should never use α > 0.1)), what kind of error are you…
A: 7) (a) Type I error: In hypothesis testing the Type I error is said to be committed when true null…
Q: You are conducting a study to see if the probability of a true negative on a test for a certain…
A: The null and alternative hypothesis is, The type of test is left tailed test The value of test…
Q: 2) A large industrial explosion occurred near a densely populated region in a major city. The…
A: Given data >60: High Exposure 40-59: Medium Exposure 20-39: Low Exposure <20: No exposure…
Q: 2. Several factors influence the value obtained for a t statistic. Some factors affect the numerator…
A: t-statistic is: t=nx¯-μ0sWhere,x¯: sample meanμ0:hypothesized population means:sample standard…
Q: You are conducting a study to see if the proportion of voters who prefer Candidate A is…
A: From the provided information, The hypotheses are as follow: H0: p = 49% H1: p > 49% The test is…
Q: Parts for a machine are acceptable within the ’tolerance’ limits of 20.5 to 20.6 mm. From previous…
A: Given information, the parts are normally distributed N(20.56; 0.02). That is, µ=20.56 σ2=0.02 Given…
Q: 6-28. Suppose that X, X,... X, are n values of a variable X andX is the arithmetic mean. Can we…
A:
Q: In a big university with over 10,000 students, 20% of all students work full time. A random sample…
A:
Q: Nearsighted. It is believed that nearsightedness affects about 8% of all children. In a random…
A: Given : number of success , x= 21.0 sample size, n = 194 population proportion,p=…
Q: 3. (20 points) In early April, about 14% of San Diego tested positive for Coronavirus. We randomly…
A: Solution
Q: 6.The market share analysis company, Net Applications, monitors and reports on the use of the…
A: If we have n trials each having two outcomes, say Success and Failure, trials being independent and…
Q: A garden is inhabited by Argentinian ants that group in spatially separated colonies which are…
A:
Q: organization randomly sampled 400 America reported such difficulty. This may indicate th alternative…
A: Given : population proportion , p = 0.28
Q: 1. right-tailed test 2. two-tailed test 3. left-tailed test a=0.05 a=0.01 a=0.05 n=25 n=20 n=5
A: The provided information is 1. For Right-tailed test α=0.05 n=25 The degrees of freedom is df=n-1…
Q: 10.23 Certain rockets are manufactured with a range of 2,500 meters. It is theorized that the range…
A:
Q: 5. An online seller produced concentrated calamansi juice and claims that their one-liter bottle has…
A: We have to write null and alternative hypothesis for given data...
Q: A company that produces a certain medicine claims that less than 0.1% of the people who take the…
A: as in question it is not giving that claimes ratio increases or decreasea after changing. so,I am…
Q: Which of the following is the point estimate of the response rate to a sudden event in less than 1…
A: Given : n=1200 , X=354 We want to find the point estimate of the response rate to a sudden event is…
Q: 3- The CO2 concentration of the flue gas air has been registered every 10th second. The last five…
A: Given the first four ACF as r0=2.30, r1=1.61, r2=1.13, r3=0.79
Q: 1.Suppose that you randomly pick a large number of tickets from a box with tickets numbered from 1…
A: Note: Hi! Thank you for the question. As you have posted multiple independent questions, according…
Q: 6 The blood pressure of a diabetic taken at random has a normal distribution with mean 126 and…
A: Given that Diabetic--- Mean = 126 , variance = 60 Non diabetic --- Mean = 121 , variance = 40 P (…
Q: Fifty people are selected randomly from a certain population and it is found that 12 people in the…
A: Given: Fifty people are selected randomly from a certain population and it is found that 12 people…
Q: 7 What middle interval of z-scores includes 75% of all z-scores? a -1.16 1.16 b -1.15…
A: We have given that, middle interval of z-scores includes 75% of all z-scores?
Q: A new drug is released to market and it has been determined that the drug is responsible for causing…
A: According to the provided information, A new drug is released to the market and it has been…
Q: 6.75 Suppose that there are 6 deaths due to bladder can- cer among workers in a tire plant from…
A: Given n=1000 P=0.0018 95% confidence interval
Q: 39. Past experience shows that, if a certain machine is adjusted properly, 5 percent of the items…
A: Type I error: Type-I error is rejecting the null hypothesis H0, when the null hypothesis H0 is…
Q: 5. An experiment was designed to sec if regular exercise can hclp lower blood pressure for patients…
A: Introduction: Two groups of volunteers with high blood pressure are considered for the study. One…
Q: 2.37 Portfolio return: A portfolio's value ir during normal times. It decreases by 10% dr portfolio…
A:
Q: 12. In a random sample of 1000 homes in a certain city , it is found 220 were heated by oil. How…
A: Consider that x is the number of interest and n is the total number of sample size. Denote p as the…
Q: 5. When a sample is randomly selected from a population, what is most likely to occur? A. The sample…
A: The sample is the part of the whole population.
Q: A production process produces an item. On average, 16% of all items produced are defective. Each…
A: Given that 16% of all items produced are defective.This means (100-16)%=84% products are good. Given…
Q: Company Size Social Media Use Small Medium Large Yes 78 42 23 No 26 37 22 What is the calculated…
A: Observed values with marginal totals:
Q: On a freeway 85% of vehicles violate the speed limit (π = 0.85). From the population of all vehicles…
A: On a freeway 85% of vehicles violate the speed limit (π = 0.85). From the population of all…
Q: 7.1 The Central Limit Theorem for Sample Means (Averages) 61. Previously, De Anza statistics…
A: Given that - De Anza statistics students estimated that the amount of change daytime statistics…
Q: 9.1: State the null hypothesis, alternate hypothesis, and whether the proi eft, right, or 2 tailed.…
A: Comment: As per the our company guidelines we are supposed to answer only three subparts. Kindly…
Q: What’s wrong? Here are several situations where there is an incorrect application of the ideas…
A: Solution: 6.53. d. From the given information, z test statistic is equal to 0.018 and the level of…
Q: Marks 20-29 30-39 40-49 50-59 60-69 70-79 80- 89 No of Candidate 3 3 26 34 22 10 2 find mean
A: The midpoint and sums are, Marks Midpoint(x) No. of Candidate(f) xf 20 - 29 20+292=24.5 3 73.5…
Q: 7. Anursing school claims that more than 28% of its students plan to go into general practice. It is…
A:
Q: 2. A claim is made that the proportion of adults who text is less than 0.4. Find the test…
A: Given that p=0.40 , n=987 , X=398
Q: 3. In experiments, it is shown that on average only 1 in 10 wells drilled produces oil. Let x be the…
A: Given,on average only 1 in 10 wells drilled produces oil.So p=probability of successp=110=0.1
Q: 10 Chikungunya virus infection was recently introduced into the Dominican Republic. During the first…
A: Incidence Rate: The proportion of the number of cases by the number of persons at risk. With this…
Q: A medical researcher says that less than 83% of adults in a certain country think that healthy…
A: Given information- Population proportion, p = 0.83 Sample size, n = 200 Significance level, α = 0.05…
Q: 9. A weapons manufacturer uses a liquid propellant to produce gun cartridges. During the…
A: Note: Hi, thank you for the question. As per our company guideline we are supposed to answer only…
Q: c) 3n n=1 İM8
A: We will use Root test for convergency test
Q: 6. Twelve cars were equipped with radial tires and driven over a test course. Then the same 12 cars…
A: a) Here the test should be a paired t test because we are applying both radial and belted tiers over…
Q: _9.In t-test, if the resultant t value is -2.72 and p<.05, what is the interpretation? a. This test…
A: t = -2.72 p < 0.05
Q: Number of males among 100 Probability P-value 35 or fewer 0.002 40 or fewer 0.028 45 or fewer 0.184…
A:
Q: True or false: If P = 0.02, then a) The result is statistically significant at the 5% level. b) The…
A:
Q: 25. An experimenter has prepared a drug that he claims has side effects in 25% or less of those…
A: P(Type II error) = P(Do not reject Ho | p = 0.75)
Step by step
Solved in 3 steps with 3 images
- Suppose the probability of incorrectly transmitting a single bit is . Compute the probability of correctly receiving a -word coded message made up of -bit words.Suppose the probability of erroneously transmitting a single digit is P=0.03. Compute the probability of transmitting a 4-bit code word with (a) at most one error, and (b) exactly four errors.1. An online website on pregnancy testing says that *Usually, if all care has been taken, [home) pregnancy tests are 97% accurate." [R314] Assume that "97% accurate" means a false positive rate and a false negative rate of 3%. Since a woman is unlikely to use a home pregnancy test unless she thinks she's probably pregnant, assume that 80% of the women who try one are in fact pregnant. Explain why a positive test indicates pregnancy more than 99% of the time even thought the false positive rate is 3%.
- A medical researcher says that less than 74%of adults in a certain country think that healthy children should be required to be vaccinated. In a random sample of 600adults in that country, 71% think that healthy children should be required to be vaccinated. At α=0.01, is there enough evidence to support the researcher's claim? Complete parts (a) through (e) below. (a) Identify the claim and state H0 andHa. Identify the claim in this scenario. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.) Fill the percentage on the correct answer A. % of adults in the country think that healthy children should be required to be vaccinated. B. Less than %of adults in the country think that healthy children should be required to be vaccinated. C. The percentage of adults in the country who think that healthy children should be required to be vaccinated is not %. D. More than…A research center claims that 26% of adults in a certain country would travel into space on a commercial flight if they could afford it. In a random sample of 1000 adults in that country, 29% say that they would travel into space on a commercial flight if they could afford it. At α=0.05, is there enough evidence to reject the research center's claim? Complete parts (a) through (d) below. (a) Identify the claim and state H0 and Ha. "Recall that the claim is the percentage of adults in the country would travel into space on a commercial flight if they could afford it. Let a success be an adult in the country who would travel into space on a commercial flight if they could afford it. Translate the claim made about the population parameter from a verbal statement to a mathematical statement." (b) Use technology to find the P-value. (c) Decide whether to reject or fail to reject the null hypothesis and (d) interpret the decision in the context of the original claim.A research center claims that 30% of adults in a certain country would travel into space on a commercial flight if they could afford it. In a random sample of 1100 adults in that country, 34% say that they would travel into space on a commercial flight if they could afford it. At α=0.05, is there enough evidence to reject the research center's claim? Complete parts (a) through (d) below. (a) Identify the claim and state H0 and Ha. Identify the claim in this scenario. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.) A. At least enter your response here% of adults in the country would travel into space on a commercial flight if they could afford it. B. 3030% of adults in the country would travel into space on a commercial flight if they could afford it. C. The percentage adults in the country who would travel into space on a commercial flight if they could…
- A research center claims that 30% of adults in a certain country would travel into space on a commercial flight if they could afford it. In a random sample of 1100 adults in that country, 34% say that they would travel into space on a commercial flight if they could afford it. At α=0.05, is there enough evidence to reject the research center's claim? Complete parts (a) through (d) below. (a) Identify the claim and state H0 and Ha. Identify the claim in this scenario. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.) A. At least enter your response here% of adults in the country would travel into space on a commercial flight if they could afford it. B. enter your response here% of adults in the country would travel into space on a commercial flight if they could afford it. C. The percentage adults in the country who would travel into space on a commercial…5. Suppose that 560 out of 1000 people polled believe that this country needs immigration reform. Is there convincing evidence that more than half of the people of this country believe in immigration reform? Take α = 0.05. a. State the null (H0) and alternative hypothesis (Ha). b. Use Excel to find the test statistic and to find the P-value. c. State your conclusion in terms of the null hypothesis.Suppose that we use the two-toss method for estimating the rate of a rare and embarrassing condition in a population (call it "U"). The more acceptible answer we'll call "V".36 students toss their coins, and those who toss heads-heads will flip their answers: if they're a "V", they'll say "U"; if they're a "U", they'll say "V".When we count up the number saying "V", we get 21 out of 36.What's the estimated rate of the more common and acceptible "V" condition?
- Suppose that we use the two-toss method for estimating the rate of a rare and embarrassing condition in a population (call it "U"). The more acceptible answer we'll call "V". 36 students toss their coins, and those who toss heads-heads will flip their answers: if they're a "V", they'll say "U"; if they're a "U", they'll say "V". When we count up the number saying "V", we get 25 out of 36. What's the estimated rate of the more common and acceptible "V" condition? LicenseFor example, for student ID s1243657, the 4th digital of s1243657 is “3”, therefore variable “A” is “Use interactive activities”; the 5th digital of s1243657 is “6”, therefore variable “B” is “Give a lot of assignments”; the 6th digital of s1243657 is “5”, therefore variable “C” is “Good communication skills. Take student id S12042516 as an example. With the data collected, Dr Tian ran a test to see if there were significant relationships between A, B, C and satisfaction toward e-learning. i ) Suggest the test that should be used and explain your reason. State the independent and dependent variables, underlying null and alternative hypotheses.Suppose that 0.63 of all adults own a car. Random samples of adults are taken and the proportion of each sample that owns a car was found.31.21% of all sample proportions were greater than 0.6937. What is σp^? σp^=
