Page 3 of 5 8. In order to create a 90% confidence interval estimating the population proportion of people who eat cereal for breakfast, what is the minimum sample size needed? Assume this data follows a normal distribution and the estimate will be within 3.5%. Round your answer to the next whole number.

Q: Suppose that prior to conducting a coin-flipping experiment, we suspect that the coin is fair. How…

A: Given that  Population proportion p=1/2=0.5 Margin of error =E =0.12/2=0.06

Q: Given the information provided, need help checking for outliers in each data set and state the value…

A: From the above data First find the the outliers of caffeine pill The data for caffeine pills 22.8,…

Q: A telemarketer's computer selects phone numbers at random. The telemarketer has recorded the number…

A: age frequency under 18  30 18-25 27 26-35 38 36-45 59 over 45 54

Q: Are

A:

Q: Question 13 Experience has shown that 15%. of municipal rates bills contain an estimated amount for…

A: Given that 15% of municipal rate bills contain an estimated amount for electricity usage. so…

Q: You are testing the claim that the mean GPA of night students is less than the mean GPA of day…

A: given data  n1 = 30x¯1 = 2.92s1 = 0.83n2 = 55x¯2 = 2.77s2 = 0.39test statistic (t) = ?

Q: The frequency distribution was obtained using a class width of 0.5 for data on cigarette tax rates.…

A: Formula Used: Population Mean μ = ∑FX∑F Population standard deviation σ = ∑FX2-nμ2n Where  n = ∑F

Q: Vitamin D, whether ingested as a dietary supplement or produced naturally when sunlight falls upon…

A: Given that, n= 2700 and p = 23% = 0.23

Q: The widths of platinum samples manufactured at a factory are normally distributed, with a mean of…

A: Given Mean=1.2 Standard deviations=0.2

Q: The familywise error rate for two uncorrected t-tests, each using an alpha level of α' = .05, would…

A: Given that, Number of tests = 2  Alpha = 0.05

Q: Instruction: Answer the following questions. Show your complete solutions. 1. Let X be a rs from…

A: Note:: According to Bartleby guidelines expert solve only one question and rest can be reposted.

Q: The Acme Company has developed a new battery. The engineer in charge claims that the new battery…

A: Given: For Old Batteries: n1 = 100 X1 = 190 s1 = 20 For New Batteries: n2 = 100 X2 = 200 s2 = 40…

Q: If you use a  0.05 level of significance in a​ two-tail hypothesis​ test, what decision will you…

A: The given ZSTAT is -2.03 and level of significance is 0.05.

Q: Find the population variance and standard deviation. 4, 7, 11, 13, 15 Choose the correct answer…

A: Solution - Find the population variance and standard deviation of the following data  X :…

Q: What is the shape of the sampling distribution of r? In what way does the shape depend on the size…

A: Followings are the Explanation of the question Correlation :- Correlation is a defined as a…

Q: Among 6171 cases of heart pacemaker​ malfunctions, 307 were found to be caused by​ firmware, which…

A: Given Data  Cases of heart pacemaker malfunctions = 6171  Pacemaker malfunctions caused by firmware…

Q: Job Bids A landscape contractor bids on jobs where he can make  $2750  profit. The probabilities of…

A:

Q: is a standard normal variable, find the probability. P>z0.68     0.2177     0.3156     0.2483…

A: X~N( 0 , 1 )   μ=0  , ?=1 (for standard normal distribution)    Z-score =( x - μ )/?

Q: For the standard normal variable Z, find the probability P(Z>2.86)P(Z>2.86) : P(Z>2.86)=

A: Given data for the standard normal variable Z  find the probability p(z>2.86)=?

Q: A consumer products testing group is evaluating two competing brands of tires, Brand 1 and Brand 2.…

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

Q: Tdf=53T∼Tdf=53, use technology to find the probability P(T>2.16)P(T>2.16): P(T>2.16)=P(T>2.16)=

A: given data for t-distribution df=52test statistics t=2.16here we have to find out the p-value for…

Q: Direction: Perform hypothesis testing. Show all the steps and solutions. Note: Excel / Stat…

A: Given  n=10 Null and Alternative Hypothesis  H0:ud=0 H:ud>0 where ud=ubefore=uafter

Q: 00 students are enrolled in a first year statistics course. Two options are offered: the students…

A: Explanatory variables are nothing, but independent variables and they effect changes in a dependent…

Q: Find the  z -score for which  95%  of the distribution's area lies to its right.       −1.36…

A: given data  standard normal distribution  Z~N(0,1) area to the right of z = 0.95 Z = ?

Q: The following data represent the pulse rates (beats per minute) of nine students enrolled in a…

A: Here, the population size, N = 9.

Q: A simple random sample of 36 8th graders at a large suburban middle school indicated that 84% of…

A:

Q: Find the 6767 -th percentile for the standard normal random variable ZZ . The 6767 -th percentile…

A: given data  standard normal distribution Z~N(0,1) we have to find 67th percentile.

Q: Dougall compared the resting heart rate of average healthy citizens and soldiers suffering from…

A: According to the given information in this question We need to apply hypothesis test

Q: For a uniform random variable U∼U(5,26)U∼U(5,26), find the probability P(U>14)P(U>14):…

A: It is given that U~U5,26.

Q: Instruction: Answer the following questions. Show your complete solutions. 1. Let X be a rs from…

A: As per the Bartleby guildlines we have to solve first question and rest can be reposted... Given…

Q: The following data represent the flight time (in minutes) of a random sample of seven flights from…

A: From the provided information, Sample size (n) = 7 The data values are as follow: 286, 269, 259,…

Q: In Marissa's calculus course, attendance counts for 15% of the grade, quizzes count for 10% of the…

A: Given attendance counts for 15% of the grade, quizzes count for 10% of the grade, exams count for…

Q: In a random sample of 81 audited estate tax​ returns, it was determined that the mean amount of…

A: Givensample size(n)=81Mean(x)=3407standard deviation(s)=2512confidence level=90%

Q: K Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation…

A: Given: μ = 100 σ = 18

Q: You are going to play mini golf. A ball machine that contains 24 green golf balls, 23 red golf…

A: Obtain the probability that you end up with a yellow golf ball.   The probability that you end up…

Q: According to a report in USA Today, more and more parents are helping their young adult children get…

A: Given datax=8n=40

Q: You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe…

A: given data  σ= 28.198% ci for μ. E = 3n = ?

Q: What is df total?

A: What is df total?

Q: 1. A planner wishes to estimate average household size for a community to within an accuracy of…

A: Given information: Accuracy (E)=±0.2Level of significance (α)=0.05Standard deviation (σ)=2.0 Find:…

Q: Direction: Perform hypothesis testing. Show all the steps and solutions. Note: Excel / Stat…

A: The data shows the length of time mothers spend in social media daily.

Q: For the standard normal variable ZZ , find the probability P(0.07<Z<3.52)

A: We will use Excel to find the required probability based on Standard Normal distribution.

Q: ↑ Each of the following three data sets represents the IQ scores of a random sample of adults. IQ…

A: The answer is attached below.

Q: The data given below show the number of overtime hours worked in one week per employee. Use the data…

A: Find pmf and shape of the distribution.

Q: Direction: Perform hypothesis testing. Show all the steps and solutions. Note: Excel / Stat…

A:

Q: Researchers surveyed 22 leading technical institutes and found that they averaged 1.1 suicides in…

A: According to the given information in this question We need to answer two subparts

Q: Question 3 The CEO of a large financial institution claims that, on average, their clients invest…

A:

Q: What is the mean (expected value) of online videos watched daily by young adults between the ages of…

A: It is given that the X be the number of videos that a randomly chosen young adult between the age of…

Q: E experience has shown that the weight of avocados by an orchard in Hoedspruit is normally…

A: Given information, μ=160σ=45n=120

Q: The commute times for the workers in a city are normally distributed with an unknown population mean…

A:

Q: May I know the answer of subpart d and e of Q7?

A: Solution: From the given information,