User Account

All Pages

Basis of the confidence interval

Assignment Help Basic Statistics
Reference no: EM13944769

Question 1: A sample of 200 high school children were asked how many tweets they sent per month. It was found that the average number of tweets per month per child was 1,500. From Twitter Research Inc., we know that the population standard deviation is 250. If you were to construct a 75% confidence interval for the mean number of texts per month per child, what would be the absolute value of the Z value?

  • 1.15
  • .67
  • .60
  • .55

Question 2: A sample of 200 high school children were asked how many tweets they sent per month. It was found that the average number of tweets per month per child was 1,500. From Twitter Research Inc., we know that the population standard deviation is 250. If you were to construct a 85% confidence interval for the mean number of texts per month per child, what would be the value of the lower limit of the confidence interval?

  • 1140
  • 1482
  • 1518
  • 1475

Question 3: A confidence interval for the average age of Walmart shoppers can be found below. On the basis of the confidence interval shown below, you can (or should) conclude that the average age of Walmart shoppers is over 52.

  • True
  • False

Question 4: A confidence interval for the average age of Walmart shoppers can be found below. On the basis of the confidence interval shown below, you can (or should) conclude that the average age of Walmart shoppers is less than 52.

  • True
  • False

Question 5: A confidence interval for the average age of Walmart shoppers can be found below. On the basis of the confidence interval shown below, you can (or should) conclude that the average age of Walmart shoppers is more than 44.

  • True
  • False

Reference no: EM13944769

Questions Cloud

How would feminist eve cole : As I learn more about the mind/brain connection, I find myself willing to give up the notion of "mind" as a separate idea. Is this just me, or does someone else feel that way?
The sample data is presented in the following table : Do the data present sufficient evidence to indicate that the mean for the machine 1 is smaller than the mean for the machine 2? Use a 0.05 level of significance.
Cost-estimating equation for total annual operating costs : Assume the local DHL delivery service hub has the following information available about fleet miles and operating costs: Use the high-low method to develop a cost-estimating equation for total annual operating costs. (Let X = annual fleet miles.)
Briefly describe the behaviour of the delete operation : What changes would you make to the above axioms in order to carry out the other two types of deletion discussed in class?
Basis of the confidence interval : A confidence interval for the average age of Walmart shoppers can be found below. On the basis of the confidence interval shown below, you can (or should) conclude that the average age of Walmart shoppers is over 52.
Explaining the creditability of new business venture : The bank has requested from you to submit a business proposal explaining the creditability of your new business venture and how it will succeed.
Explain the idea of a context as it relates to hci design. : Describe the Norman Cycle and apply it to a typical scenario of usage for a librarian using an electronic library catalogue.
How much must be deposited now : If the parent decides instead to deposit a lump sum now in order to attain the goal of $250,000 in 13 years, how much must be deposited now?Amount = __________________________(dollars)
What are the attributes of this god : What indications are there in the poem that Akhenaton believed in 1 universal god? What are the attributes of this god?

Reviews

Write a Review

Basic Statistics Questions & Answers

  Conduct hypothesis test to test that the population mean

Conduct a hypothesis test to test that the population mean for population A is no greater than the population mean for B. Use the 0.08 significance level.

  Methods of establishing correlation between variables

Describe different methods of establishing correlation between variables and provide an example of each. Discuss the advantages and disadvantages of each method and where each must be applied.

  Formulate the relevant null and alternative hypotheses in

before a championship football game the referee is given a special commemorative coin to toss to decide which team will

  Approximation to the binomial distribution

The probability that a male will be color blind is 0.042. Use the normal curve approximation to the binomial distribution to find the probabilities that in a group of 53 men, no more than 6 are color-blind.

  Hypothesis test for proportion-hypothesized value

A PC manufacturer claims that no more than 2% of their machines are defective. In a random sample of 100 machines, it is found that 5% are defective. The manufacturer claims this is a fluke of the sample.

  Critical-value and p-value method of hypothesis testing

What is the difference between the critical-value method and the p-value method of hypothesis testing? Include in your post how the question's topic pertains to your health discipline.

  Based on your confidence interval is it reasonable to

oil field pipes are internally coated in order to prevent corrosion. researchers at the university of louisiana

  Calculate the measures of center and measures of variation

Calculate the measures of center and measures of variation

  What is the probability for a given year

The highest record temperature during the month of July for a given year in Death Valley, in California, has an approximately normal distribution with a mean of 123.8oF(!) and standard deviation of 3.1oF. What is the probability for a given year th..

  Computing mean-standard deviation of binomial distribution

The probability that a flower seed will germinate is 0.7. Find the mean and standard deviation for the random variable x, the number of seed that will germinate in each set.

  There chance of the condo not being able to withstand a

there chance of the condo not being able to withstand a major storm is .008 and because there is a storm every year the

  Evaluating the p-value for mortgage rate for small banks

At.01 significance level, can we conclude that 30-year mortgage rate for small banks is less than 6%? Evaluate the p-value.

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