User Account

All Pages

Lifetimes of smartphones follow a normal distribution

Assignment Help Basic Statistics
Reference no: EM132581543

A recent study of the lifetimes of smart phones found the average is 24.3 months. Assume the population standard deviation is 4.6 months. A simple random sample of 35 smartphones was selected

a) Is it necessary to assume that the lifetimes of smartphones follow a Normal distribution? Briefly explain.

b) What is the probability that the sample mean lifetime would be less than 23 months?

c) What is the probability that the sample mean lifetime would be more than 22 months but less than 26 months?

d) What is the probability that the sample mean lifetime would be more than 26.5 months?

Reference no: EM132581543

Questions Cloud

Tabulate the probability distributions : A fair dice is rolled once. If the score is 3 or more, then the 'outcome' X is the score. If the score is 1 or 2, then the dice has to be rolled
How number consists of four different digits : A: The number does not contain digit 6. B: The number consists of four different digits. C: The number begins with digit 3.
What is the carrying value of interest-bearing notes : What The carrying value of interest-bearing and non-interest-bearing notes can be all of the following except? face value plus a premium
What is the probability of each of the possible outcomes : The distribution of blood types in the United States is as follows, where positive and negative refer to the Rhesus (Rh) factor:
Lifetimes of smartphones follow a normal distribution : Assume the population standard deviation is 4.6 months. A simple random sample of 35 smartphones was selected
What is the amount of loan payable to be reported : After the second monthly payment is made, what is the amount of loan payable to be reported on the balance sheet (rounded to dollars)?
What is the critical value : A researcher is examining depression questionnaire scores for individuals who are taking a new depression medication.
Which statements about installment notes is not true : Which statements about installment notes is NOT true? The earlier payments will cover more interest expense than the later payments.
Predict the outcome of the one-tailed test : A researcher evaluates a treatment effect using a two-tailed hypothesis test with a = .05, and the decision is to reject the null hypothesis.

Reviews

Write a Review

Basic Statistics Questions & Answers

  Statistics-probability assignment

MATH1550H: Assignment:  Question:  A word is selected at random from the following poem of Persian poet and mathematician Omar Khayyam (1048-1131), translated by English poet Edward Fitzgerald (1808-1883). Find the expected value of the length of th..

  What is the least number

MATH1550H: Assignment:  Question:     what is the least number of applicants that should be interviewed so as to have at least 50% chance of finding one such secretary?

  Determine the value of k

MATH1550H: Assignment:  Question:     Experience shows that X, the number of customers entering a post office during any period of time t, is a random variable the probability mass function of which is of the form

  What is the probability

MATH1550H: Assignment:Questions: (Genetics) What is the probability that at most two of the offspring are aa?

  Binomial distributions

MATH1550H: Assignment:  Questions:  Let’s assume the department of Mathematics of Trent University has 11 faculty members. For i = 0; 1; 2; 3; find pi, the probability that i of them were born on Canada Day using the binomial distributions.

  Caselet on mcdonald’s vs. burger king - waiting time

Caselet on McDonald’s vs. Burger King - Waiting time

  Generate descriptive statistics

Generate descriptive statistics. Create a stem-and-leaf plot of the data and box plot of the data.

  Sampling variability and standard error

Problems on Sampling Variability and Standard Error and Confidence Intervals

  Estimate the population mean

Estimate the population mean

  Conduct a marketing experiment

Conduct a marketing experiment in which students are to taste one of two different brands of soft drink

  Find out the probability

Find out the probability

  Linear programming models

LINEAR PROGRAMMING MODELS

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +1-415-670-9521

Phone: +1-415-670-9521

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd