What is the percentile for Colorado, where 10.1% of the residents are aged 65 and olde

Q: Following are the playback times (in hours) for a sample of 20 MP3 players. 13, 15, 21, 21, 23, 23,…

A:

Q: The 95th percentile of 6-year-old boys' heights in the United States is 48.8 inches tall.  Explain…

A: Given: The 95th percentile of 6-year-old boys' heights in the United States is 48.8 inches tall.

Q: You want to determine if the graduation rate of different than the known national graduation rate.…

A: The researcher is interested to determine if the graduation rate of high-school students is…

Q: find 40 th percentile   10,15,18,16,19,20,24,15,26,20,22,25,28,17

A:

Q: Claim: Fewer than 93 ​% of adults have a cell phone. In a reputable poll of 1162   ​adults, 85 ​%…

A: Given information- Population proportion, p = 0.93 Sample size, n = 1162 Sample proportion is- We…

Q: You want to know what percentage of students own pets at your university. In asking 10 random…

A: In an observational study, researcher observes the individuals and measure the outcomes. In this…

Q: Determine the sample proportion. It has been determined with 95% confidence that the proportion of…

A:

Q: Use critical thinking to list at least three things wrong with this survey. Explain fully using…

A: Given information: The results of online survey are given.

Q: What is the medium of these figure skating ratings? 5.0,6.0, 7.0, 7.5, 8.0, 9.0, 10.0?

A: The given data is already arranged in ascending order.5.0 , 6.0, 7.0, 7.5, 8.0, 9.0, 10.0

Q: You have a sample of 10 (sorted) scores:   -15.5 -13.4 -12.7 -12.2 -11.1 -10.8 -9.1 -8.9 -7.9 -7.1…

A: -15.5-13.4-12.7-12.2-11.1-10.8-9.1-8.9-7.9-7.1Sample of size(n)=10

Q: Assume that a recent survey suggests that about 79​% of adults have heard of the brand.   n=

A: It is given that a recent survey suggests that about 79​% of adults have heard of the brand.

Q: The owner of a local bar specializing in alternative music wanted to determine the average age of…

A: t 95% confidence level, the z value is 1.96 which can be obtained by using the standard normal…

Q: ​Claim: Fewer than 92​% of adults have a cell phone. In a reputable poll of 1172 adults, 86​% said…

A: The hypotheses for the test are given below. Null hypothesis: H0: p = 0.92 Alternative hypothesis:…

Q: how does the sample and population relate?

A: Sample and population both are different items, but both are related with each other. Population is…

Q: 31 of 48% is what?

A: 31 of 48%

Q: Following are the playback times (in hours) for a sample of 20 MP3 players. 10, 15, 21, 21, 23, 23,…

A: Given information- We have given a data set- X – 10, 15, 21, 21, 23, 23, 24, 26, 27, 30, 30, 31, 37,…

Q: What is the percentile rank of a bag that contains 1025 chocolate​ chips?

A: The mean is 1252 and the standard deviation is 129.

Q: In 1995, it was determined that 78% of US citizens supported a ban on household aerosols. Thinking…

A: To find: 1.Test statistics 2.p-value

Q: Researchers examined the influence of a television program on children's aggressiveness. The number…

A: (since it is nit mention which question so as per our protocol we shall answer only the first three…

Q: Is a population proportion a parameter or a statistic? What about a sample proportion? Explain your…

A: Parameter: Any statistical measure based on all units in the population is called Parameter.…

Q: A report shows that 32% of citizens want to move out of theirneighborhood. An alderman wants to test…

A: The objective of the question is to identify the appropriate statistical test to determine if the…

Q: Harley Davidson motorcycles make up 13% of all the motorcycles registered in the United States.You…

A: Approximate distribution is normal

Q: Does the population proportion and sample proportion always have the same value?

A: The question is about parametric inference.Introduction :Population proportion :The value of…

Q: Find the mean, median, mode and midrange and then compare the means using 5% Number of hours spent…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: recent poll reports that between 53% and 59% of voters will vote for president george in the next…

A: The confidence interval is (53%, 59%).

Q: Suppose that 19% of all athletes in a sport use a banned drug. A test is available that detects 88%…

A:

Q: A software company is interested in improving customer satisfaction rate from the 54% currently…

A: Let p be the population proportion of customer satisfaction rate.Given that,Population proportion…

Q: We'd like to know the percentage of people living in California who owns a cell phone. How many…

A: It is given that margin of error (E) is 0.04 and the confidence level is 0.95.

Continuous Probability Distributions

Probability distributions are of two types, which are continuous probability distributions and discrete probability distributions. A continuous probability distribution contains an infinite number of values. For example, if time is infinite: you could count from 0 to a trillion seconds, billion seconds, so on indefinitely. A discrete probability distribution consists of only a countable set of possible values.

Normal Distribution

Suppose we had to design a bathroom weighing scale, how would we decide what should be the range of the weighing machine? Would we take the highest recorded human weight in history and use that as the upper limit for our weighing scale? This may not be a great idea as the sensitivity of the scale would get reduced if the range is too large. At the same time, if we keep the upper limit too low, it may not be usable for a large percentage of the population!