A group of students need to submit a project and they need to survey people about their daily routine. How many people should they survey in order to be 95% confident that the estimated ( sample) proportion is within three percentage points of the true population? Assume that pq= 0.25

Q: Calculate the 55th percentile of the data shown x 2.8 3.5 4.3 7.3 9.2 19.1

A: Number of observation (n) = 6 55th percentile (P55) = Pk

Q: Find each of the requested values for the distribution shown in the following table. (d) What is…

A: Given data is appropriate for measures of dispersion to find the percentile for the given data . But…

Q: in a recent poll 13% of all respondents said they are afraid of heights

A: a) Here, n = 3, p = 0.13, (1 - p) = 0.87 and x = 3As per binomial distribution formula P(X = x) =…

Q: Find each of the requested values for the distribution shown in the following table. (a) What score…

A: Percentile Rank (PR): It is the measure of the relative performance, where it is the percentage of…

Q: For a population with  σ = 8,  X=13 and a z-score = 2.21, find the value of µ

A:

Q: If you are told only that you scored in the 80th percentile, do you know from that description…

A: p-th percentile means that there are p% of the values are less than that value. Here, you scored in…

Q: If you have a z-score of 4.00 and the body proportion is .99997 and the question is asking for the…

A: The z-score is given by 4.

Q: The 70th percentile of the data presented in the table above is

A:

Q: h sampling error

A: From the Given information above we have to calculate sampling error for 14 samples. Sampling error:…

Q: The distribution of SAT scores is normally distributed with a μ = 500 and a σ = 100.  a, What…

A: Let X be a continuous random variable of the distribution of SAT scores  is normally​ distributed…

Q: For the data given, as the confidence leel increased from 95% to 99% did the margin of error…

A: We have given that a random sample of eye colours collected from a group of 40 MVCC students.

Q: You are told that your IQ scores falls at the 79th percentile.  What conclusion could you make about…

A: Percentiles: If the elements in the data set are arranged in ascending order of magnitude, then the…

Q: (e) forty-three percent of all trials of this type are completed within how many days?

A: Given Information: The duration of a particular type of criminal trial is known to be normally…

Q: d) What percentage of women are TALLER than 5 feet 11 inches? Round to nearest tenth of a percent. %…

A: Given Information: Mean height of adult men = 69.8 inches The standard deviation of height of adult…

Q: A health journal conducted a study to see if packaging a healthy food product like junk food would…

A: From the given information we conduct Z test for one mean.

Q: If the shaded area corresponds to z=-0.90, what proportion of the distribution corresponds to z >…

A: We have given that the shaded area correspond to z = -0.90.

Q: What score has a percentile rank of 50%?

A: From the given information: n=20 k=50 Therefore, using this following formula to find the LP…

Q: Because of safety considerations, in May 2003 the Federal Aviation Administration (FAA) changed its…

A: Confidence interval : ( 180.024, 185.976) interpretation: b. We are 95% confident that the true…

Q: A survey conducted among 40 people to find out the number of times each of them eats in a fast food…

A: Class Frequency 19 - 21 1 16 - 18 2 13 - 15 3 10 - 12 4 7 - 9 6 4 - 6 9 1 - 3 15…

Q: In the effect size formula, what does d stand for and what does m stand for? When considering a…

A: Effect size formula (Cohen’s D): One of the most common ways to measure effect size is Cohen’s D…

Q: Given a data set with = 18 and o= 3, find the percent of data within each range: between 15 and 21 =…

A: Given that  Mean = µ = 18 Standard deviation = σ = 3 Z-score formula  Z = ( X - µ ) / σ Note :…

Q: Calculate the percentile/decile for the following marks obtained by 9 students:   Xi    45    32…

A:

Q: What is the measure of PD?

A: From the figure  FD is diameter , Therefore, ∠FED=90∠FEP+∠PED=9035+∠PED=90∠PED=90-35∠PED=55

Q: Consider a survey in which 1000 people are asked “How often do you go to the dentist?”  The variable…

A: Given: Number of people that have been involved in the study = 1000

Q: For a population with u = 80 and o = 10, what is the X value corresponding to z-score = - 2.00? Edit…

A:

Q: From the study of the relation between smoking and mortality, male recipients of war pensions were…

A: Chi square test is used to measure whether there is independency exist between the two categorical…

Q: The data provided in the above statkey display refers to a random sample of 50 healthy adults where…

A: a) From the output, For original sample, n=50 That is, the number of people in the original sample…

Q: The claim is that for a smartphone​ carrier's data speeds at​ airports, the mean is μ=18.00 Mbps.…

A: Given information Hypothesized mean µ = 18.00 Mbps Sample size (n) = 24 The value of test…

Q: In research about the population of a county with 100,000 inhabitants, a sample of 3000 households…

A: According to the provided data, a total of 3000 households were contacted to participate in the…

Q: d) What percentage of women are TALLER than 5 feet 11 inches? Round to nearest tenth of a percent.…

A: formula for z-score is

Q: Because of safety considerations, in May 2003 the Federal Aviation Administration (FAA) changed its…

A: a) The 95% confidence interval for the population mean summer weight of Airline passenger is given…

Q: For a sample of 12 offenders convicted of weapons violations, the length of prison sentence in…

A: to find mean valuemean = sum of observations/ count of observationsmean = (6 + 6 + 2 + 12 + 36 + 48…

Q: In a study with lower quartile 100, upper quartile 140 and median as 130 How many people can have…

A:

Q: Given a collection of paired sample data, the y = bo +b,x algebraically describes the relationship…

A: Given equation is ŷ = b0 + b1x which describes the relation between x and y with collection of…

Q: How large a sample must she select if she desires to be 98% confident that the true mean is within 4…

A: HERE GIVEN , population standard deviation  = 6 ounces  confidence level = 98%  MOE  = 4

Q: Can smoking negatively affect one's ability to become pregnant? A study collected data on 654 women…

A: Given,   Smoker Non-smoker Total Pregnant 27 195 222 Not pregnant 100…

Q: Can smoking negatively affect one's ability to become pregnant? A study collected data on 654 women…

A: Given Total collected data 654

Q: The scores on the Wechsler Adult Intelligence Scale are approximately Normal, with ?=100 and ?=15 .…

A: From the provided information, The scores on the Wechsler Adult Intelligence Scale are approximately…

Q: Sleep Aids. The additional sleep, to the nearest tenth of an hour, obtained by a sample of 100…

A: Quantitative variable: A variable that provides numerical values of individual and Arithmetic…

Q: 1. What percentage of scores fell within ±1 SD for ZADHD?

A: Introduction: The "ZADHD" values indicate the z-scores of ADHD.

Q: In research about the population of a county with 100,000 inhabitants, a sample of 3000 households…

A: The number of households not willing to participate in the survey is 1200.

Q: Can smoking negatively affect one's ability to become pregnant? A study collected data on 654 women…

A: Obtain the proportion of women that were not pregnant were also smokers. The proportion of women…

Q: team owners used this data to begin a lawsuit that claimed re ns. They want to perform statistical…

A: Given: Total number of challenges, N = 316 Number of calls overturned, n = 154 p = 50% = 50100=0.50…

Q: In the formula for t, the "hypothesized value" is what you expect the t to be. the difference…

A:

Q: snip

A: Given: p¯=0.01n=25z=3.0 The upper and lower control limits of p-chart is obtained as below:…

Q: Can smoking negatively affect one's ability to become pregnant? A study collected data on 654 women…

A: Given Total number of women

Q: A male apparel company surveyed men t results are summarized below:

A: Given,  the table Years    Percentage Less than 1 year         16% 1 - 4 years         62%…

Q: Given μ=25and σ=4.8,what would be the x-value for the ninety-fifth percentile?

A: Given:  μ=25 σ=4.8

Q: A group of 100 people, who lived at varying distances (in kilometers) from an island nuclear power…

A: The expected values in a Chi-Square test for independence are the values that are expected to be…

Q: What percent of our campus is female? If no preliminary study is made to estimate, how large a…

A: Given that no preliminary sample is taken to estimate the proportion of females. let the sample size…

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.