4.2 The average age of a sample of 17 South African women who attend yoga...

4.2 The average age of a sample of 17 South African women who attend yoga classes was found to be 31 years, with a standard deviation of 3.5 years. Construct a 90% confidence interval for the true average age of all South African women who attend yoga classes. Interpret your answer.

Confidence Level	Z - Limits
90%	± 1.645
95%	±1.96
99%	±2.58

Expert Solution

Given data,

n = 15,

Average(x)=31

standard deviation(S)=3.5

90% confidence interval is given by =

=

= (29.461,32.538)

orchestra answered 2 years ago

The Sweatshop Computer Assembly plant claims the average age of its employees is 17. A sample...

The Sweatshop Computer Assembly plant claims the average age of its employees is 17. A sample of 12 employees was taken and the results are summarized below. 16 15 18 17 16 15 17 19 16 15 16 15 a.Using the .01 significance level is there enough evidence to conclude the average age is different from 17? (assume the distribution is normal) Find the P value

In the following study a sample of n=933 men and women age 25 to 64 who...

In the following study a sample of n=933 men and women age 25 to 64 who have recently suffered severe back pain, where selected. the objective of the study is to determine the factor that have greatest influence of the severity back pain. Each subject has given questionaries and scores on a scale of 0-100 as to serenity of their back pain disability. in addition to age and sex, measurements where take on height,weight,height/weight ratio and lifetime participation rate in...

women who reported an earlier age at menarche were more likely to be heavier at age...

women who reported an earlier age at menarche were more likely to be heavier at age 7 years (average weight = 24.7 kg) compared with those who reported a later age at menarche (average weight = 23.2 kg) (P = 0.01). The correlation between weight at age 7 years and age at menarche was -0.17 (P = 0.009). Q: The -0.17 value is for what? how to find it and why it is important to mention?

A sample of 30 diabetic women was taken at a health center, and the age at...

A sample of 30 diabetic women was taken at a health center, and the age at which the disease appeared was recorded, as shown in the table Xi years Xi years Xi years Xi years Xi years 1 36 6 46 12 50 18 44 24 39 2 52 7 41 13 53 19 53 25 40 3 55 8 43 14 41 20 55 26 44 4 61 9 52 15 40 21 51 27 46 5 48 10...

Susan Jackson is a 66 years old African American women who is admitted to acute rehab...

Susan Jackson is a 66 years old African American women who is admitted to acute rehab for continuing care of a right below the knee amputation. Mr Jackson had a surgery 2 weeks ago the wound is not healing properly. Mr Jackson has a history of type 2 diabetes mellitus, hypertension, hyperlidemia and obesity. What are you primary concerns for this patient and what assessment and interventions would be associated with your concerns and why ?

17. A new African American lounge in Brooklyn who advertises on social media and websites only...

17. A new African American lounge in Brooklyn who advertises on social media and websites only accepts African American patrons. Some of Brooklyn’s new Caucasian residents filed injunction suit citing the Commerce Clause. Which case have they cited as precedent to their claim?

In a random sample of 100 adult Americans who did not attend college, 37 said they...

In a random sample of 100 adult Americans who did not attend college, 37 said they believe in extraterrestrials. In a random sample of 100 adult Americans who did attend college, 47 said they believe in extraterrestrials. At the 1% level of significance, does this indicate that the proportion of people who did not attend college and believe in extraterrestrials is less than the proportion of people who did attend college and believe in extraterrestrials? State the null and alternate...

A magazine article states the average age of women getting married for the first time is...

A magazine article states the average age of women getting married for the first time is 25 years old. A researcher suspects this article may be incorrect. The researcher randomly selects 105 women who were recently married and found their average age was 24.7 years. The standard deviation of the population is 5.3 years. Perform a hypothesis test using ∝ = 0.10. Step #2: Find the test value Which test is needed? two, right, or left tailed test Find the...

In the sample of 605 women, they reprt that their ideal average number of children is...

In the sample of 605 women, they reprt that their ideal average number of children is 3.41 with standard deviation of 1.92 in the sample of 640 men they report that their ideal number of children is 2.99 with standard deviation of 1.94. test the hypothesis that men and women prefer a different number of children.

QUESTION 17 If a sample average is found to be 62.7, and the margin of error...

QUESTION 17 If a sample average is found to be 62.7, and the margin of error is calculated to be 4.6, then the upper end of the confidence interval for mu would be ______ QUESTION 18 If a sample average is found to be 18, and the margin of error is calculated to be 0.06, then the lower end of the confidence interval for mu would be ______ QUESTION 19 Use your TI83 to find the upper end of the...

Question