randomly selected people were asked how long they

Eng saciid ahmed 2022-10-02

randomly selected people were asked how long they slept at night. The mean time was 7.1 hours, and the standard deviation was 0.78 hour. Find the 95% confidence interval of the mean time. Interpret your result.
 

You can still ask an expert for help

Expert Community at Your Service

  • Live experts 24/7
  • Questions are typically answered in as fast as 30 minutes
  • Personalized clear answers
Learn more

Solve your problem for the price of one coffee

  • Available 24/7
  • Math expert for every subject
  • Pay only if we can solve it
Ask Question

Expert Community at Your Service

  • Live experts 24/7
  • Questions are typically answered in as fast as 30 minutes
  • Personalized clear answers
Learn more

You might be interested in

asked 2022-03-25

Assume a binomial probability distribution with n = 50 and p =0.25. Compute the following: a. The mean and standard deviation of the random variable. b. The probability that X is 15 or more. c. The probability that X is 10 or less.

asked 2022-06-11

A box contains a large number of pens that are three colours: red, blue and green. The 
probability that a pen is faulty depends on its colour. The probability of a faulty red pen is 
0.1, while the probability of faulty blue and green pens is 0.15 and 0.08, respectively. In the 
box, 35% of the pens is red in colour, 40% is blue in colour and the rest is green in colour.

asked 2022-07-30
asked 2022-08-19

Suppose that X is a random variable with mean and variance both equal to 20.  What can be said about P{0<X<40}?

asked 2022-06-22

 

asked 2022-07-23

Please use the attached data to answer the questions from each of the scenarios.  I will need the data and output from each scenario given to me separately using SPSS analysis.

asked 2020-11-30

Identifying Probability Distributions. In Exercises 7–14, determine whether a probability distribution is given. If a probability distribution is given, find its mean and standard deviation. If a probability distribution is not given, identify the requirements that are not satisfied. Cell Phone Use In a survey, cell phone users were asked which ear they use to hear their cell phone, and the table is based on their responses (based on data from “Hemispheric Dominance and Cell Phone Use,” by Seidman et al., JAMA Otolaryngology—Head & Neck Surgery , Vol. 139, No.

5).  P(x)Left0.636Right0.304No preference0.060

New questions