Confidence intervals for the average number

Assignment Help Basic Statistics
Reference no: EM132191941

SE=std error/sqrt(sample size)

So in this case:

SE = 50/sqrt(100)

SE = 50/10

SE = 5

The company wants an estimate of potential sales. They launched a test across 100 stores. These 100 stores had average daily sales of 140 units with a standard deviation of 50.

Calculate the 99%, 95%, and 68% confidence intervals for the average number of units anticipated to sell.

Reference no: EM132191941

Questions Cloud

Percentage of sample means : Suppose a random sample of 20 balls are selected. What percentage of sample means will be less than 5.15 inches?
Find the probability that x is greater : find the probability that x is greater than or equal to 35 using the normal approximation to the binomial. ( discuss whether continuity correction is required o
Service responsibilities of a cable company : An important part of the customer service responsibilities of a cable company relates to the speed with which trouble in service can
Perform the test at significance level : what is the calculated value of the test statistic? From the hypotheses according to the question and perform the test at 1% significance level
Confidence intervals for the average number : Calculate the 99%, 95%, and 68% confidence intervals for the average number of units anticipated to sell.
Effects of the length of an exercise program : What statistical test would I run for the following example? A researcher is interested in the effects of the length of an exercise program on the flexibility
How does indoor air pollution impact child health around : What role do socio-economics, policy decisions, and race play in the ability of people to respond to health issues caused by air pollution?
What is the probability that sam will catch cooties : The probability Sam will catch cooties when she goes to school is 0.8. Sam is going to school 4 days next week.
Decision regarding the null hypothesis : If the company's claim is to be tested, determine the value of the test statistic and state your decision regarding the null hypothesis.

Reviews

Write a Review

 

Basic Statistics Questions & Answers

  Power of a statistical test and decision errors

1. What is the relationship between the power of a statistical test and decision errors?

  Find the point estimate of the percentage of adults

Find the point estimate of the percentage of adults who are in favor of this death penalty. Find a 95% confidence interval estimate of the percentage of adults who are in fa- vor of this death penalty.

  Binomial probability distribution

Let X be the number of hits that Regina gets. As we know, the distribution of X is a binomial probability distribution. What is the number of trials (n).

  Black skin leading to false positive tests for marijuana

According to the alwaystestclean.com website, a report by the Los Angeles Times News Service stated that in a study of 161 prescription and over-the-counter.

  Assume the readings on thermometers are normally

assume the readings on thermometers are normally distributed with a mean of 0 degree c and a standard deviation of 1.00

  When circuit boards used in the manufacture of compact disc

when circuit boards used in the manufacture of compact disc players are tested the long-run percentage of defectives is

  Find confidence interval for difference between proportion

Find a 95% confidence interval for the difference between the proportions of unacceptable assemblies from the two teams.

  Perform an analysis of variance for the data

Perform an analysis of variance for the data. Display the computed quantities in an ANOVA table.- Find the value of R2 that would be obtained if you were to fit the linear model in part b to the data.

  Outcomes in the sample space

a. When events A and B are mutually exclusive, then P(A and B) = P(A) + P(B). b. The union of events A and B consists of all outcomes in the sample space that are contained in both event A and event B. c. When two events A and B are independent, the ..

  Manufacturing and product development

Manufacturing and Product Development Paper towel manufacturers constantly advertise their products' strength, amount of stretch, and softness.

  The center of disease control and prevention reported the

the center of disease control and prevention reported the diastolic blood pressure of adult women in the us are

  How would you interpret this estimate

Investigators report an beta estimate of 0.34 for sodium intake (g/d) associated with hypertension status among a population US nurses aged 40-80 years

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!

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