Solution-Sample of customer order totals with an average

Sample of customer order totals with an average

Assignment Help Applied Statistics

Reference no: EM13540070

1) A random sample of customer order totals with an average of $78.25 and a population standard deviation of $22.50. Calculate a 90% confidence interval fro the mean, given a sample size of 75 orders

2) A random sample of 35 teenagers averaged 7.3 hours of sleep per night. Assume the population standard deviation is 1.8 hours. Calculate a 98% confidence interval for the mean.

3)A company claims the average time a customer waits for help is 4.78 min. Assume the population standard deviation for wait time is 1.8 min. Test the company claim at the α = 0.05 significance level by comparing the calculated z-score to the critical z-score.

Reference no: EM13540070

Questions Cloud

Who are at least 75 years of age in samples of 150 : Assume that your county's population is similar to the American population in age distribution. What are the mean and standard deviation of the proportion P^ who are at least 75 years of age in samples of 150 respondents?

State the null and alternative hypotheses : State the null and alternative hypotheses

Relationship between schizophrenia and the season of birth : The data indicate a significant relationship between schizophrenia and the season of birth?

Female college basketball players produce a distribution : The heights of all female college basketball players produce a distribution

Sample of customer order totals with an average : 1) A random sample of customer order totals with an average of $78.25 and a population standard deviation of $22.50. Calculate a 90% confidence interval fro the mean, given a sample size of 75 orders

The growth hormone increases the milk production : Is there evidence that the growth hormone increases the milk production?

A family history of allergic disease. : (a) Give a 95% confidence interval for the proportion p of children with asthma, in the general population of children who were exposed to parac-etamol in early life and have a family history of allergic disease.

Determine rossis total assets as of december : Determine Rossi's total assets as of December 31 and determine the company's total liabilities as of December 31.

Use a test of hypotheses of level alpha = 0.05 : Using this data, is there enough evidence that the average depth of the ice sheet is below 3140 m? Assume that the depth of the ice sheet is normally dstributed. Use a test of hypotheses of level alpha = 0.05.

User Account

All Pages

Sample of customer order totals with an average

Reference no: EM13540070

Reference no: EM13540070

Questions Cloud

Reviews

Write a Review

Applied Statistics Questions & Answers

Hypothesis testing

Calculate the maximum reduction in the standard deviation

Calculate the expected value, variance, and standard deviati

Determine the impact of social media use on student learning

Unemployment survey

Statistical studies

Evaluate the expected value of the total number of sales

Statistic project

Simple data analysis and comparison

Analyze the processed data in statistical survey

What is the probability

Frequency distribution

Assured A++ Grade

Academics

Major Subjects

Majors

Get In Touch

TERMS & POLICIES

HELP & SUPPORT