Math

StatisticsQ&A LibraryA researcher wishes to estimate the percentage of adults who support abolishing the penny. What size sample should be obtained if he wishes the estimate to be within 4 percentage points with 99% confidence if (a) he uses a previous estimate of 28%? (b) he does not use any prior estimates?Start your trial now! First week only $4.99!*arrow_forward*

Question

A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size sample should be obtained if he wishes the estimate to be within 4 percentage points with 99% confidence if

(a) he uses a previous estimate of 28%?

(b) he does not use any prior estimates?

Tagged in

Math

Statistics

Find answers to questions asked by students like you.

Q: An aerosolized vaccine for measles was developed in Mexico and has been used on 4 million children s...

A: As per the questionLet X be the random variable that denotes number of children who developed an imm...

Q: From a sample with n=32, the mean number of televisions per household is 4 with a standard deviation...

A: Chebyshev’s rule can be used for the large set data. It says that at least 1-1/k2 percentage of the ...

Q: A relay microchip in a telecommunications satellite has a life expectancy that follows a normal dist...

A: A)The number of months should the satellite be insures for to be 95% secure that it will last beyond...

Q: Suppose 36 participants complete an experiment where ads are presented subliminally during a task (e...

A: a). From the provided information, the null and alternative hypothesis can be stated as:H0:µ=0.50, t...

Q: 4. Suppose a new sample is chosen and you got the following estimated OLS line: predicted birthweigh...

A: Introduction:Effect of scale change of the predictor, on the regression coefficients:Suppose x denot...

Q: Political Survey- A political analyst found that 43% of 300 randomly selected republican voters feel...

A: It is given that p hat is 0.43 and sample size (n) is 300. The confidence level is 0.95.

Q: The lengths of pregnancies are normally distributed with a mean of 266 days and a standard deviation...

A: Click to see the answer

Q: A certain flight arrives on time 90 percent of the time. Suppose164 flights are randomly selected. U...

A: Hello welcome! According to our principles cannot answer more than three subparts in any question. S...

Q: r9o1010 Au cimal places) sadle Cx03.9 63 The average score of local students on a college entrance e...

A: From the provided information, the average (μ) and standard deviation (σ) of local students on a col...

Q: To estimate the mean score ? of those who took the Medical College Admission Test on your campus, yo...

A: Part-aGivenStandard deviation = 6.5According to 68-95-99.7 rule with in one standard deviation of me...

Q: 38. P(1.12 -1.43) For Exercises 41 through 46, find the z value that corre- sponds to the given are...

A: 41.It is known that in a standard normal distribution, P(Z≤0) = P(Z≥0) = 0.5.

Q: Today, the waves are crashing onto the beach every 5.8 seconds. The times from when a person arrives...

A: The probability density function (PDF) of the uniformly distributed random variable with parameters ...

Q: Consider a binominal experiment with 2 trials, and p=0.4 d. Find the probability of at least one suc...

A: In this context, X has a Binomial distribution with parameters n = 2 and p = 0.4. Since X is a discr...

Q: The caffeine content (in mg) was examined for a random sample of 50 cups of black coffee dispensed b...

A: Given sample size of black coffee cups n = 50Caffeine content mean = 110mgStandard deviation = 7.1 m...

Q: E and F are mutually exclusive events. P(E) = 0.91; P(F) = 0.42. Find P(E | F)

A: Mutually Exclusive Events: The events E and F are mutually exclusive events. That is, P(E and F)=0.

Q: Please show TI 84 steps

A: According to the provided information, a fingerprints expert will correctly identify the match 83% o...

Q: You work for a soft-drink company in the quality control division. You are interested in the standa...

A: a) The sample standard deviation is and it is obtained below: From the given information, there are ...

Q: A manufacturer of a chocolate candies uses machines to package candies as they move along a filing l...

A: It is given that sample mean and standard deviation are 8.159 and 0.051, respectively.The test hypot...

Q: Suppose that you are buying a car for $50,000, including taxes and license fees. You saved $10,000 f...

A: 13. a) The monthly payment for incentive A is $698 and it is obtained below: From the given informat...

Q: I have to draw a P-Value graph using variables I calculated in a Chi-square test using Phstat in Mic...

A: Given Chi square test,Critical value = 12.59test statistic = 5.61p value = 0.47In chi square test th...

Q: I go to a Mexican Restaurant that serves my favorite foods. I can choose from a topped sopapilla, t...

A: The food can choose from a topped sopapilla, two enchiladas or cheese quesadillas. The water or Peps...

Q: The US population is 13% African American. If you were to take a SRS of 500 Americans, what is the ...

A: It is given that the sample size n is 500 and p hat = 0.13.

Q: For a population of m=50 and standard deviation of 6, describe the shape, the mean, and the standard...

A: The provided information is:

Q: A Gallup pool indicated that 29% of Americans spent more money in recent months than they used to. B...

A: Population of interest: The population of interest can be defined as the cluster of all the individu...

Q: Selecting a card- when a card is drawn from a deck, find the probability of getting a. A diamond ...

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are sol...

Q: Figure 1 shows sample proportions from samples of size n=40 from a population. Estimate the value of...

A: It is given that sample size (n) is 40.The given graph shows that the sampling distribution of propo...

Q: In a survey of 909 U.S.adults with children conducted by the financial Industry Regulatory Authority...

A: The hypotheses for the test is given below.Null hypothesis:H0: p = 0.30Alternative hypothesis:H1: p ...

Q: Please show TI 84 steps. Part d

A: a)t>2.718, df = 11=0.01( From Excel =T.DIST.RT(2.718,11))type error = significance level = 0.01re...

Q: A recent survey revealed that an American's Christmas spending averaged $830. Use this as the popula...

A: From the given information, let us define the random variable X as the amount of spending follows no...

Q: I'm studying for an exam tomorrow, and I keep getting stuck on the same section of problems, no matt...

A: The test is randomized, so, the answers will vary, one of the possible answers is given below:In thi...

Q: the distribution of certain test scores is a nonstandard normal distribution with a mean of 80 and ...

A: Given:Population mean (μ) = 80Population standard deviation (σ) = 3

Q: Delta Airlines quotes a flight time of 3 hours, 5 minutes for a particular flight. Suppose we believ...

A: Given dataActual flight time = 3 hours 5 minutes = 185 minutesNote 1 Hour = 60 MinLet X denotes flig...

Q: How hot is the air in the top (crown) of a hot air balloon? Information from Ballooning: The Complet...

A: a)Given:

Q: In 2008, the Detroit Lions set an NFL record by losing all 16 regular season games. Suppose that the...

A: It is given that n =16.Here, probability of winning an individual game is 0.10.

Q: Please show TI 84 steps

A: Click to see the answer

Q: A scrable players scores an average of 365 points per game with a standard deviation of 41. What is ...

A: From the given information,x (score) is the random variable that follows normal distribution with me...

Q: The manufacturer of a certain brand of household light bulbs claims that the bulbs produced by their...

A: The provided information are:Sample size (n) = 10Sample mean (x̄) = 1960Sample standard deviation (s...

Q: Figure 1 shows sample means from samples of size n=100 from a population. Estimate the value of the ...

A: It is given that sample size (n) is 100.The given graph shows that the sample means of a population,...

Q: Today, the waves are crashing onto the beach every 5.8 seconds. The times from when a person arrives...

A: Note:Hey there! Thank you for posting the question. However, since your question has more than 3 sub...

Q: Please see picture

A: It is provided that X defined as random variable, follow the distribution of Benford’s Law.a)To show...

Q: How many different three-letter words (including nonsense words) can be formed allowing repetition o...

A: From the given information, three letter words formed allowing repetition of letters.Three letter in...

Q: Personnel tests are designed to test a job applicant's cognitive and/or physical abilities. A part...

A: It is given that the mean and standard deviation are 74 and 7.4, respectively.

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores ar...

A: From the given data, normally distributed with mean (μ) =100 and standard deviation (σ) =15And, also...

Q: What is the total number of scores (N) for the distribution shown in the following table? X ...

A: The total number of scores in a frequency table can be referred as the sum of the products of freque...

Q: A survey asked buyers whether color, size, or brand influenced their choice of cell phone. How many ...

A: This problem involving 3 sets : Color, Size and Brandn(Color)=5n(Size)=8n(Brand)=16n(Color and Size)...

Q: According to scientists, the cockroach has had 300 million years to develop a resistance to destruct...

A: Obtain the critical value at 95% confidence level:It is given that,Sample mean = 10,693/5,000=2.1386...

Q: State the null and alternative hypothesis for the following: a) The average SAT in the state is repo...

A: a)Formulation of hypothesisNull Hypothesis: - mean for the local district is equal to 1010Alternativ...

Q: Please show TI 84 steps

A: The given data show that the surface roughness of coated interior pipes.

Q: The histogram shows the ages of 25 CEOs listed on a certain website. Based on the distribution, wha...

A: The histogram shows the ages of 25 CEOs.Given histogram is like a symmetric histogram.

Q: Assume that different groups of couples use a particular method of gender selection and each couple ...

A: Introduction:Consider giving birth to a girl to be a success. The probability of success is, p = 0.5...