Assume that a sample is used to estimate a population proportion p. Find the 80% confidence interval for a sample of size 342 with 43.9% successes. Enter your answer as an open-interval (i.e., parentheses) using decimals (not percents) accurate to three decimal places. 80% C.I. = Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places.

Q: The results: A. Are, or B. Are not   significantly: A. High, or B. Low   so there: A. is, or B. is n...

A: Here you are given that claim Most adults would not erase all of their personal information online i...

Q: Before every​ flight, the pilot must verify that the total weight of the load is less than the maxim...

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Q: Consider the following hypotheses: H0: μ = 470HA: μ ≠ 470 The population is normally distributed wit...

A: From the provided information, The hypotheses are as follow: H0: µ = 470 HA: µ ≠ 470 Population stan...

Q: Suppose that the prevalence of diabetes in the U.S. is 10% and that the prevalence of cardiovascular...

A: Solution: Let A be event that a person in the U.S has diabetes and B be the event that a person in t...

Q: How large must the sample size be in order to to estimate a true proportion to within one percentage...

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Q: Suppose that the distribution function of X is given by 0, b }). d. Find P (X < ).

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

Q: How many different ways can 6 identical hardback books, 3 identical paoerback books, and 3 identical...

A: Given that there 6 identical hardback books, 3 identical paperback books and 3 identical boxed books...

Q: The Wall Street Journal reported that 33% of taxpayers with adjusted gross incomes between $30000 an...

A: It is given that 33% of taxpayers with adjusted gross incomes between $30000 and $60000 itemized ded...

Q: The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 0.90...

A: X~Normalμ=0.901,σ2=0.3012 Sample size = n = 44.  

Q: A student estimates that the amount of time needed to solve a homework problem is exponentially dist...

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Q: Assume that a simple random sample has been selected from a normally distributed population and test...

A: Given that, A safety administration conducted crash tests of child booster seats for cars. Listed be...

Q: What price do farmers get for their watermelon crops? In the third week of July, a random sample of ...

A: Since we know population standard deviation, use z-distribution to find z-critical value. Find z-cri...

Q: Suppose the heights of 18-year-old men are approximately normally distributed, with mean 66 inches a...

A: Let "x" be the heights of 18-year-old men. Draw the normal curve and shade the area between z=-0...

Q: A particular fruit's weights are normally distributed, with a mean of 736 grams and a standard devia...

A: Let X denote the particular fruit's weights are normally distributed, with a mean of μ=736 grams and...

Q: The Confidence Interval: A. Does not include, or B. Includes   So the means before and after the tre...

A: Given information After treatment Sample Standard deviation = 24.7 min Sample mean = 74.8 min Sample...

Q: You are a teacher at a gifted school, and you feel that the newest class of students is even brighte...

A: Given that, You are a teacher at a gifted school, and you feel that the newest class of students is ...

Q: Suppose the prevalence of alcoholism among college students is 20% among those living in group housi...

A: It is given that the prevalence of alcoholism(A) among college students is 20% among those living in...

Q: see attached

A: Test statistic (z) = -2.31 and claim p=1/6  That is given test is two tailed test. Significance leve...

Q: Based on past experience, a bank believes that 8.8 % of the people who receive loans will not make p...

A: Given : sample size = 210 p = 0.088 μp^ = p μp^ =0.088 σp^ =p×(1-p)n σp^ =0.088×(1-0.088)210 σp^ =0....

Q: 20. Assume that women's heights are normally distributed with a mean given by µ=63. in, and a standa...

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Q: consider an x distribution with standard deviation σ = 10. (For each answer, enter an exact number.)...

A: The standard error for the sampling distribution can be calculated as: σx=σn Given: σ = 10 σx =5 (a)...

Q: You have an SRS of size 51 and calculate the one-sample t statistic. What is the critical value t* s...

A: Given information Sample size n = 51 Degrees of freedom = 51 – 1 = 50 Significance level = 0.02

Q: 2

A: Probability = 0.5 Sample size = 9

Q: Find the area of the shaded region. The graph depicts IQ scores of adults, and those scores are norm...

A: It is given that IQ scores follows N (100, 15).

Q: In a sample of 16 fish from my pond it was found that 5 are under 165 grams in weight.  Based on thi...

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Q: 1-You will be conducting a study focusing on the relationship between student studying hours and fin...

A: Solution: To test the relationship between any two variables, a correlation test is used. The correl...

Q: It is very important to be able to find probabilities for a given z score.  Using software or a Stan...

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Q: Find the regression​ equation, letting the first variable be the predictor​ (x) variable. Using the ...

A: Given,

Q: A consumer magazine has conducted a simple random sample of 15 owners of a certain automobile and as...

A:   Obtain the 99% confidence interval for the population mean.   The 99% confidence interval for the ...

Q: III-   In a study of the effects of early Alzheimer’s disease on nondeclarative memory, Reber et al....

A: Confidence Interval: In statistics, we can say a range of values of the specified population paramet...

Q: A researcher collected how many grams of fat people on a specific diet consumed at breakfast and at ...

A: This is a consequence of regression.  It is useful in statistics. 

Q: Can I get some help please

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Q: According to Masterfoods, the company that manufactures M&M's, 12% of peanut M&M's are brown, 15% a ...

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Q: 13) Find the probability of "at least 4" using the probability distribution below. Write your answer...

A: (13) Obtain the probability of "at least 4" using the probability distribution below. The probabilit...

Q: You recently sent out a survey to determine if the percentage of adults who use social media has cha...

A: Given Information: Percentage of adults who used social media five years ago = 56%  i.e., proportion...

Q: The method of tree ring dating gave the following years A.D. for an archaeological excavation site. ...

A: This question requires accurate results, Hence I will use excel to solve this question. https://...

Q: A sample of n = 49 scores with M = 43 is selected from a population with µ = 40 with σ = 21. What is...

A: Mean = 40 Standard deviation = 21 Sample size = 49 Sample mean = 43

Q: Flip a fair coin 100 times. Use X to denote the number of heads we get. Find Var(X)

A: Flip a fair coin 100 times.  Let X to denote the number of heads we get.

Q: 18

A: Z score is given. Right tailed test

Q: Determine the margin of error for the confidence interval for the proportion:   0.578&lt;μ&lt...

A: The confidence interval for the trilinear inequality is given by Therefore,    

Q: suppose that a category of world-class runners are known to run a marathon (26 miles) in an average ...

A: Here since the mean is symmetrically distributed mean is equal to median. Given mean=143

Q: An investment counselor calls with a hot stock tip. He believes that if the economy remains​ strong,...

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Q: A large number of identical items are placed into service at time 0. The items have a failure rate f...

A: Note: Thank you for the question. Since multiple subparts are posted, according to our policy, we ar...

Q: The manager of a computer retails store is concerned that his suppliers have been giving him laptop ...

A: Solution: Let X be the laptop replacement times. From the given information, X follows normal distri...

Q: Find the minimum sample size n needed to estimate u for the given values of c, o, and E c= 0.95, o =...

A: Since we know population standard deviation, use z-distribution to find z-critical value. Find z-cri...

Q: Models help us describe and summarize relationships between variables. Understanding how process var...

A: scatter plot for above data:

Q: The values listed below are waiting times (in minutes) of customers at two different banks. At Bank ...

A: Sample size is n=10, The standard deviation is calculated as follows: Mean =∑xn            =6.4+6.6+...

Q: A poll is taken in which 345 out of 500 randomly selected voters indicated their preference for a ce...

A: Given information n = 500 x = 345 Sample proportion

Q: Evaluate the expression. C(7, 4) · C(9, 4)

A: Given : C(7, 4) · C(9, 4) C(n, r) = n!r!×n-r! C(7, 4) = 7!4!×7-4! C(7, 4) = 7×6×53×2×1 C(7, 4) = 35

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.