Ten percent of the world's population is left-handed. A researcher claims that left-handed individuals are more creative than those who aren't left-handed. In order to support his claim, he takes a sample of 900 artists and finds that 8% of them are left-handed.   Answer the following. (If necessary, consult a list of formulas.) (a)Find the mean of p , where p is the proportion of left-handed individuals in a random sample of 900 .   (b)Find the standard deviation of p .   (c)Compute an approximation for P≤p0.08 , which is the probability that there will be 8% or fewer left-handed people in a random sample of 900 . Round your answer to four decimal places.

Q: In 1955, Life Magazine reported that a 25-year-old mother of three worked, on average, an 80 hour…

A:

Q: You are curious about how the mean age of cars compares for students and faculty. You take a random…

A: We have given that a random sample of 25 students and a random sample of 25 faculty members.

Q: In 1955, Life Magazine reported that the 27 year-old mother of three worked, on average, an 75 hour…

A: Given Information :  In 1955, Life Magazine reported that the 27 year-old mother of three worked, on…

Q: A researcher wants to study the proportion of people on trial for first degree murder who are found…

A: Given data: proportion: p = 0.15 Claim: The proportion of U.S teenagers between the ages of 13 and…

Q: The administration team compiled test results for those who had been tested for strep throat in a…

A: The objective of the question is to determine the ratio of false positives to true positives based…

Q: Suppose that we know that 33.8% of the people born in the United States between 1936 and 1951 have…

A: The given situation follows binomial distribution. The proportion of people born in United States…

Q: Find the medians. The median for males is beats per minute and the median for females is beats per…

A: Given: Male Female 86 66 91 86 56 92 68 90 83 79 60 89 61 90 72 77 63 95 74…

Q: You are curious about how the mean age of cars compared for students and faculty. You take a random…

A:

Q: recent study reported that 12% of people toss away about half of what they buy at the grocery store.…

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

Q: In 1955, Life Magazine reported that the 25 year-old mother of three worked, on average, an 80hour…

A: Solution: Given information: n= 85 Sample size  x= 83.5 Sample mean μ= 80 Populaion Mean s= 10…

Q: If you have a 99% confidence that a population proportion is in the interval from a to b, what does…

A:

Q: A recent survey of a new diet cola reported the following percentages of people who liked the taste.…

A: Area% FavoredNumber surveyed12520002352000350500

Q: A class of 5 students averaged 70% on a given test. A class of 9 students averaged 80% on the same…

A: Introduction: Suppose there are k groups numbered 1, 2, 3, …, k – 1, and k.

Q: reported that the 27-year-old mother of three worked, on average, a 75 hour week. Recently, many…

A: As the population standard deviation is not known, we will use a t-test. The null and alternative…

Q: Mr. James McWhinney, president of Daniel-James Financial Services, believes there is a relationship…

A: Given information: Number of contacts(x) Sales(y) 14 24 12 14 20 28 16 30 46 80 23 30…

Q: Among the first-year resident students, eight students were randomly selected, and their body…

A: Given: weight at the beginning of the semester (X) End of term weight (Y) 45 52 61 65 62 64…

Q: For one study, researchers sampled over 100,000 first-time candidates for the certified public…

A: Here in a one study, researchers sampled over 100,000 first-time candidates for the certified public…

Q: Mr. James McWhinney, president of Daniel-James Financial Services, believes there is a relationship…

A: The formula for the confidence interval is,where,denotes the predicted value of yse denotes the…

Q: A sample of 276 people was surveyed. People are classified according to their political ideology…

A: Given Data : Number of right wing people = 47 + 25 + 19 = 91 Number of people who are indifferent…

Q: b. Using a = 0.10, determine if the slope for the regression equation is statistically significant.…

A: The data shows the amount of time in minutes a purchaser spends on its Web site and the amount of…

Q: Ten percent of the world's population is left-handed. A researcher claims that left-handed…

A: Given dataTen percent of the worlds population are left handed.A researcher took a sample of 900…

Q: It has been found that 85.6% of all enrolled college and university students in the United States…

A: The random variable students who are undergraduates follow normal distribution. We have to test…

Q: Listed below are pulse rates​ (beats per​ minute) from samples of adult males and females. Find the…

A: Mean: Mean is defined as the ration of sum of all observations to the total number of all…

Q: MJ took a sample of 50 pieces of data. She added up all of the pieces of data and then divided by…

A: The objective is to determine which measure of central tendency is used in the given scenario.…

Q: A sample has a mean of M = 50. If one new person is added to this sample, what effect will this have…

A: The sample mean is defined as M = Σx/n, where the value of observation is x and n is the total…

Q: A study found that 1.21% of Social Security recipients are too young to vote. If 800 Social Security…

A:

Q: An Internet retailer would like to investigate the relationship between the amount of time in…

A: The data shows the amount of time in minutes a purchaser spends on its Web site and the amount of…

Q: In 1955, Life Magazine reported that the 25-year-old mother of three worked, on average, an 80 hour…

A: Claim : the mean work week has increased for women

Q: According to a census company 7 1% of all bables bom are of low bith weight An obstetrician wanted…

A: Given information Proportion of low-birth-weight babies = 0.071 Total babies selected n = 240