Question

Asked Nov 4, 2019

199 views

Many young men in North America and Europe (but not in Asia) tend to think they need more muscle to be attractive. One study presented 200 young American men with 100 images of men with various levels of muscle. Researchers measure level of muscle in kilograms per square meter (??/?2) of fat‑free body mass. Typical young men have about 20 ??/?2 . Each subject chose two images, one that represented his own level of body muscle and one that he thought represented “what women prefer.” The mean gap between self‑image and “what women prefer” was 2.35 ??/?2 .

Suppose that the “muscle gap” in the population of all young men has a Normal distribution with standard deviation 2.5 ??/?2 . Give a 90% confidence interval for the mean amount of muscle young men think they should add to be attractive to women. (Enter your answers rounded to four decimal places.)

lower limit=

upper limit=

Step 1

It is given that,

Sample mean = 2.35.

Population standard deviation, sigma is 2.5.

The sample size, *n *is 200.

Step 2

The* z-*critical value for 90% confidence interval is approximately 1.645.

...

Tagged in

Find answers to questions asked by student like you

Show more Q&A

Q: Please show TI 84 steps

A: Computation of mean and standard deviation:Here, n=300; p̂=0.40; q̂=0.60 (=1−0.40).The mean and stan...

Q: Airline passengers arrive randomly and independently at the passenger-screening facility at a major ...

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are sol...

Q: the following display from a Ti-84 plus calculator presents a 95% confidence interval. Tinterval: (5...

A: It is given that the 95% confidence interval is (57.84, 60.48).

Q: Question 1

A: Let mu1 be the sample mean of acute schizophrenics and mu2 be the mean of chronic schizophrenics.Hyp...

Q: please answer 1 & 2 The National Highway Safety Administration recognizes that the antilock...

A: 1)Formulation of hypothesisNull Hypothesis: - There is no difference between the average fatal crash...

Q: Jobs and productivity! How do banks rate? One way to answer this question is to examine annual profi...

A: (a)Using the provided data, the sample mean can be calculated using Excel function “AVERAGE()”.Enter...

Q: Question Seventy cards are numbered 1 through 70, one number per card. One card is randomly selec...

A: Define the given events A as multiples of 3 and B as multiples of 5.The events A and B are as follow...

Q: A survey asked buyers whether color, size, or brand influenced their choice of cell phone. How many ...

A: This problem involving 3 sets : Color, Size and Brandn(Color)=5n(Size)=8n(Brand)=16n(Color and Size)...

Q: Consider a binominal experiment with 2 trials and p=0.4 a. Compute the probability of 1 success f(1)...

A: Given binomial experiment with n = 2 and p = 0.4The binomial probability for x number of success is ...