Statistics Projects for High School Students

DaniecIf sample size of 100 are selected from a population with a mean of 28 and a standard deviation of 18,what is the standard error of the mean

Diabetes and unemployment. A Gallup poll surveyed Americans about their employment status and whether or not they have diabetes. The survey results indicate that 1.5% of the 47,774 employed (full or part time) and 2.5% of the 5,855 unemployed 18-29 year olds have diabetes. (Gallup, 2012)

a. Create a two-way table presenting the results of this study.

b. State appropriate hypotheses to test for difference in proportions of diabetes between employed and unemployed Americans.

c. The sample difference is about 1%. If we completed the hypothesis test, we would find that the p-value is very small (about 0), meaning the difference is statistically significant. Use this result to explain the difference between statistically significant and practically significant findings.

p(0.2 and 0.65) if p(0.2 or 0.65) =0.47

P(x ≥ 8)

if you choose a student at random are the events 10th grade and eats regularly in the cafeteria independent explain how you know

question 2

help please

Assume that females have pulse rates that are normally distributed with a mean of

μ=74.0

beats per minute and a standard deviation of

σ=12.5

beats per minute. Complete parts​ (a) through​ (c) below.

Question content area bottom

Part 1

a. If 1 adult female is randomly​ selected, find the probability that her pulse rate is between

68

beats per minute and

80

beats per minute.

The probability is

enter your response here.

​(Round to four decimal places as​ needed.)

Part 2

b. If

16

adult females are randomly​ selected, find the probability that they have pulse rates with a mean between

68

beats per minute and

80

beats per minute.

The probability is

enter your response here.

​(Round to four decimal places as​ needed.)

Part 3

c. Why can the normal distribution be used in part​ (b), even though the sample size does not exceed​ 30?

A.

Since the mean pulse rate exceeds​ 30, the distribution of sample means is a normal distribution for any sample size.

B.

Since the distribution is of​ individuals, not sample​ means, the distribution is a normal distribution for any sample size.

C.

Since the distribution is of sample​ means, not​ individuals, the distribution is a normal distribution for any sample size.

D.

Since the original population has a normal​ distribution, the distribution of sample means is a normal distribution for any sample size.

To use a normal approximation to the binomial, which of the following does not have to be true?

According to a report 77.3% of murders are committed with a firearm ( a) If 400 murders are randomly selected, how many would we expect to be committed with a firearm? (b) Would it be unusual to observe 338 murders by firearm in a random sample of 400 murders? Why?

The number of qualified voters living in the household on a randomly selected Subdivision block is described by the following probability distribution. What are the variance and standard deviation respectively of the probability distribution? 

Suppose that the New England Colonials baseball team is equally likely to win a game as not to win it. If

5

Colonials games are chosen at random, what is the probability that exactly

4

of those games are won by the Colonials

Travel.By.Us is an internet-based travel agency wherein the customers can see vedios of the cities they plan to visit. the number of daily hits at its website is normally distributed with ú=1,000 and ō=240. What is the probability of getting fewer than 900 hits?

construct all random sanples consisting three observations from the given data.arrange the observations in ascending order without replacement and repetition.

80  83  86  89  92