A random sample of 70 voters found that 42% were going to vote for a certain candidate. Find the 90% limit for the population proportion of voters who will vote for that candidate.

Q: In a random sample of 800 seniors at Mill Creek High School, 100 students are askedt if they prefer…

A: Given that  Random sample size (n) = 800 Out of 100 students 76 students preferred to have…

Q: Public Opinion reported that 5% of Americans are afraid of being alon night. If a random sample of…

A:

Q: Twenty percent of the trees in a particular forest have a disease, 30% of the trees are too small to…

A: Bayes' Theorem :  Bayes’ theorem is a mathematical formula used to determine the conditional…

Q: Suppose a quarterback's completion percentage for the season is 67.2%. Based on relative frequency,…

A: We have to find Based on relative frequency, is it more likely that he will complete his next two…

Q: low-birth-weight babies graduate from high school by age 20. If 180 ​very-low-birth-weight babies…

A: The expected value can ve calculated as, E(x) =np

Q: Researchers are studying two populations of sea turtles. In population D, 30 percent of the turtles…

A: Given information- Population proportion of D, pd = 0.30 Population proportion of E, pe = 0.20…

Q: a) 10 samples of different Publishers are on display at an Open Day.                   Visitors are…

A: Total available sample n= 10 Number of samples to be selected r = 4

Q: In a recent election, 63% of all registered voters participated in voting. In a survey of 275…

A: The percent of participation of voters is equal to: In the given case; when the observation sample…

Q: A small ice cream parlor has had great success over the past several years and is interested in…

A: Given information: Number of customers randomly selected in the sample, n = 56 Number of customers…

Q: Researchers are studying two populations of sea turtles. In population D, 30 percent of the turtles…

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

Q: Out of a sample of 38 people, 23 people enjoyed biking and 15 enjoyed running. Test the claim that…

A: Given that,  x = 23, n = 38 The sample proportion of people prefer biking is, Null and alternative…

Q: Assume that half the population is vegetarian so that the chance of an individual being a vegetarian…

A:

Q: Claim: A minority of adults would erase all of their personal information online if they could. A…

A: Claim: A minority of adults would erase all of their personal information online if they could.

Q: A group of 50 teachers and school administrators attended a convention. If any two persons are…

A: Solution: Let x be the number of teachers.

Q: Suppose a senator finds that 45% of the United States voters are in favor of abolishing the…

A: z=critical value of 95% confidence interval=inverse normal of 0.95=1.96p=proportion=…

Q: IN A CITY 250 MEN OUT OF 750 WERE FOUND TO BE SMOKERS. DOES THIS INFORMATION SUPPORT THE CONCLUSION…

A:

Q: In a  lab ,the coronavirus  vaccine causes negative effects  in 3 out of every 100 patients . 5…

A: Given,n=5p=0.03X~Binomial(n=5,p=0.03)P(X=x)=cxn px(1-p)n-x ;X=0,1,.....n

Q: During the summer of 2020, about 68% of San Diego young adults played a game called Animal Crossing.…

A:

Q: Suppose that a poll taken 10 years ago found that 56% of parents spank their children. Suppose a…

A: In a poll 10 years ago it is found that 56% of parents spank their children.

Q: Zach ,a Quality Process Engineer for Hershey Chocolates, pulled 16 random kisses from duction and…

A: For the given information, sample mean=0.1608=AVERAGE(E1:E16) sample standard…

Q: A sample of n = 15 scores ranges from a high of X = 11 to a low of X = 3. If these scores are placed…

A: Given: Lowest value of X = 3 Highest value of X = 11

Q: According to a recent report, 21% of all adults routinely skip breakfast. A researcher believes this…

A:

Q: A pollster randomly selected 4 of 10 available people. How many different groups of 4 are possible?

A: Given,   A pollster randomly selected 4 of 10 available people.   The objective is to find how many…

Q: Suppose a survey is taken of 300 high school seniors out of a total of 1,000 seniors. This group is…

A: the group is probably a

Q: Researchers are studying two populations of sea turtles. In population D, 30 percent of the turtles…

A: It is known that, the conservative law of thumb for the sampling distribution of sample proportion…

Q: Researchers are studying two populations of sea turtles. In population D, 30 percent of the turtles…

A: (a) The sample proportion of sea turtle with shell greater than 2 feet in population D is, Thus,…

Q: A taste-testing survey of Zing Farms showed that 2/3 of the people surveyed preferred the taste of…

A:

Q: If six out of ten individuals in a population carry a gene for a defective enzyme, how many…

A:

Q: Fifty people are selected randomly from a certain population and it is found that 12 people in the…

A: From the given information, There are 50 people and 12 people in the sample are over six feet tall.…

Q: Your town does a study and finds that 3 in 5 dogs have licenses. If there are 250 dogs in town, how…

A: In the given study it has been found that 3 in 5 dogs have licenses. The probability that the dogs…

Q: According to a census company, 7.1% of all babies born are of low birth weight. An obstetrician…

A: Here we conduct Z test for proprtion.

Q: A survey is conducted on the use of Facebook of adults in the United States, where 12,000 adults are…

A: Population of a survey means the entire group on which we are taking survey. Sample is a specific…

Q: If 3% of all cars fail the emissions inspection, find the probability that in a sample of 90 cars,…

A:

Q: if a person is dealt 13 cards from an ordinary deck of 52 playing cards several times, how many…

A:

Q: The grades of a sample of 9 students on a prelim exam (x) and on the midterm exam (y) are shown in…

A: Let X denote the prelim exam Let Y denote the midterm exam Calculation:

Q: Researchers are studying two populations of sea turtles. In population D, 30 percent of the turtles…

A:

Q: From a sack of fruit containing 3 oranges, 2 apples and 3 bananas, a random sample of 4 pieces of…

A: Given: n(oranges) = 3 n (apples) = 2 n (Bananas) = 3 n (total) = 3+2+3              = 8 n(drawn) = 4…

Q: According to a census company, 7.1% of all babies born are of low birth weight. An obstetrician…

A: Given: Part a: The expected number of low-birth weight births to 35 to 39 year old mother is, n × p…

Q: A recent study suggested that 70% of all eligible voters will vote in the next presidential…

A: Solution: Let X be the number of eligible voters will vote in the next presidential election and n…

Q: A market research study hopes to determine if the average sales of house entertainment units will…

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

Q: Claim: A minority of adults would erase all of their personal information online if they could. A…

A: a. Let p denotes the population proportion adults that would erase their personal information. It is…

Q: The national Park service monitors streams in Rainier national park for pollution and fish spawning…

A: Solution: Let A be the event that a stream polluted is 0.62 and B be the event that the streams in…

Q: In a sample of 310 people, 186 completed only high school, 24 completed only some college, 93…

A: Given data A sample of 310 people is given. 186 completed only high school. 24 completed only some…

Q: Suppose that insurance companies did a survey. They randomly surveyed 450 drivers and found that 300…

A: Part a:          x = 300         n = 450         p' = 300/450 = 0.6667   Part b:  X is the number of…

Q: On a particular night, a baseball stadium sells 60% of its seats, and of those, 15% do not end up…

A: According to the provided data, 60% of the seats are booked and 15% of these do not end up showing,…

Q: Researchers are studying two populations of sea turtles. In population D, 30 percent of the turtles…

A:

Q: Researchers are studying two populations of sea turtles. In population D, 30 percent of the turtles…

A: Given, For population D, nd=40 ,xD=15, pD^=1540 For population E, nE=60 ,xE=11, pE^=1160

Q: a report about an isolated community claims there are more newborn females than males although we…

A: The given claim is that there are more newborn females than males.Let p1 and p2 be the sample…

Q: In a group of people everyone rolls a die. What is the smallest number of people that should be in…

A: When some objects are arranged or a rearrangement is made for a number of objects arranged in an…