User Account

All Pages

Daily time spent communicating on a smartphone

Assignment Help Basic Statistics
Reference no: EM132138159

A survey of a random sample of 1000 smartphone owners found that the mean daily time spent communicating on a smartphone was 131.4 minutes. From previous studies, it is assumed that the population standard deviation is 21.2 minutes. Communicating on a smartphone includes text, email, social media, and phone calls.

Can anyone find the 99% confidence interval for this? Be sure to include your inputs!

Reference no: EM132138159

Questions Cloud

What is the completion time : Assume the length of games follows the normal distribution with a standard deviation of 10 minutes. Complete parts a through d below.
Describes a binomial experiment : Which of the following describes a binomial experiment that would determine the probability that a case of 24 bottles has all bottles properly filled?
What is the probability that the average : Suppose 3 people are sampled and their scores averaged together. What is the probability that the average will be between 7.4 and 7.5?
What are the minimum-first quartile-median-third quartile : What are the minimum, first quartile, median, third quartile, maximum, interquartile range, and range of the data set below? Make a box-and- whisker plot.
Daily time spent communicating on a smartphone : A survey of a random sample of 1000 smartphone owners found that the mean daily time spent communicating on a smartphone was 131.4 minutes
Estimate the probability of the team winning : Knowing that the team has won an average of 95 games over the past three seasons and that there are 162 games in a season, estimate the probability
Same mean and sample size : If two samples A and B had the same mean and sample size, but sample A had a larger standard deviation, which sample would have the wider 95% confidence interva
Confidence interval for the temperature of your cup : What would be the 95% confidence interval for the temperature of your cup of coffee?
Proportion of shafts with a diameter : Many manufacturing problems involve the accurate matching of machine parts, such as shafts, that fit into a valve hole. A particular design requires

Reviews

Write a Review

Basic Statistics Questions & Answers

  Probability that this person is a boy or an adult male

a. If we selected one individual at random what is the probability that this person is a boy or an adult male?

  Confidence interval for the average number of hours

A market researcher wants to find the 99% Confidence Interval for the average number of hours people spend online each day.

  Using the joint characteristic function find the correlation

Find the joint characteristic function,  - Using the joint characteristic function, find the correlation, E[XY].- Find E[X2Y2].

  Determine the probability that the target will be hit

Determine the probability that the target will be hit at least 12 times.

  Probability that the sample proportion surviving

The probability that the sample proportion surviving for at least 3 years will be less than 68?% is ____?

  Psychology and human behavior

Psychology and Human Behavior During each summer, many families spend part of their vacation time at a beach along the East or West Coast.

  Give the margin of error for given estimate

Assuming that this is an SRS of 1200 U.S. residents over the age of 18, give the 95% margin of error for this estimate.

  A turbine blade has demonstrated a weibull failure pattern

a turbine blade has demonstrated a weibull failure pattern with a decreasing failure rate characterized by a shape

  Concept of one-tailed or two-tailed test

Label and describeeach step of the hypothesis testing procedure, and be sure to specify whether this is a one-tailed or two-tailed test.

  Probability that at least one machine will be working proper

The probability that first processing machine is not working properly at any time is 0.07, and the probability that the second machine is not working properly.

  Potential safety compromise occurs

The plan should also include the steps you would take if a potential safety compromise occurs in any area.

  Alternative hypothesis-cost of gasoline

The cost of gasoline will decrease or stay the same over the next 30 days because of summer holiday travel. What is your alternative hypothesis statement?

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