Homework Help for Statistics (page 3)

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Medical research suggests that systolic blood pressure in adults is approximately normally distributed with a mean of 123.5 mm Hg and standard deviation 11.5 mm Hg.

What value of systolic blood pressure distinguishes the highest 10%?

 

Answered
3 Apr 2019

While conducting experiments, a marine biologist selects water depths from a uniformly distributed collection that vary between 2.00 m and 7.00 m. What is the probability that a randomly selected depth is between 2.25 m and 5.00 m

Answered
2 Apr 2019

The ages of a group of

125

randomly selected adult females have a standard deviation of

16.2

years. Assume that the ages of female statistics students have less variation than ages of females in the general population, so let

sigmaequals16.2

years for the sample size calculation. How many female statistics student ages must be obtained in order to estimate the mean age of all female statistics students? Assume that we want

95%

confidence that the sample mean is within one-half year of the population mean. Does it seem reasonable to assume that the ages of female statistics students have less variation than ages of females in the general population?

Answered
1 Apr 2019

In a random sample of 1,000 people, it is found that 7% have a liver ailment. Of those who have a liver ailment, 6% are heavy drinkers, 55% are moderate drinkers, and 39% are nondrinkers. Of those who do not have a liver ailment, 13% are heavy drinkers, 44% are moderate drinkers, and 43% are nondrinkers.

If a person is chosen at random, and he or she is a heavy drinker, what is the probability of that person having a liver ailment?

If a person is chosen at random, what is the probability the person is a moderate drinker?

Answered
30 Mar 2019

Forest bathing, also called Shinrin-yoku, is the practice of taking short, leisurely walks in a forest to enhance positive health. To test the usefulness of this practice, the time forest bathing per day was recorded among eight patients with depression who subsequently showed a marked reduction in their symptoms over the last week. The data are given in the table.

Time Spent in the Forest (in hours)
4.3
4.8
5.1
3.7
4.3
5.4
4.0
4.5
(a) Find the confidence limits at a 95% CI for this sample. (Round your answers to two decimal places.) 
(No Response) to (No Response) hours per day 

(b) Suppose the null hypothesis states that the average time spent forest bathing among patients is 3.5 hours per day. What would the decision be for a two-tailed hypothesis test at a 0.05 level of significance?
    

Answered
30 Mar 2019

a)List two similarities between an independent-measures ANOVA and a repeatedmeasures ANOVA. (2 marks) b. List two differences between an independent-measures ANOVA and a repeatedmeasures ANOVA. (2 marks) c. You were asked by a friend to explain what a repeated-measures design is. Provide a research example of a repeated-measures design and explain why your example represents this type of design. (

Answered
28 Mar 2019

Diseases I and II are prevalent among people in a certain population. It is assumed that 10% of the population will contract disease I sometime during their lifetime, 15%will contract disease II eventually, and 3% will contract both diseases
Find the probability that a randomly chosen person from this population will contract at least one disease.
Find the probability that a randomly chosen person from this population will contract neither disease.
Find the probability that a randomly chosen person from this population will contract disease I but not disease II.

Answered
27 Mar 2019

please solve for the answer, thank you

Answered
25 Mar 2019

can you please solve this for the answer

Answered
23 Mar 2019

can you please solve this for the answer

Answered
23 Mar 2019

A grocery store has six types of beans, five types of corn, and four types of peas. How many ways can a customer buy one of each vegetable? 
    

Answered
21 Mar 2019

The score of six student in math and economic is this..in math  40,50,10,30,60&50 in economics 50,44,50,42,20&44 use spearman rank to find the relationship in the score 

  1.  

Answered
21 Mar 2019

10,11,13,16,16,19,26,26

Answered
19 Mar 2019

Hi there would you be able to help with this?

Answered
18 Mar 2019

If A and B are mutually exclusive events with P(A) = 0.3 and P(B) = 0.5, then P(A∩B) =

Answered
17 Mar 2019