What is the null hypothesis and expected value

Assignment Help Basic Statistics
Reference no: EM13153816

A sociologist wanted to determine whether there was a difference in the amount of time children aged 5-7 spent watching tv. check the following data for evidence that the number of minutes spent watching tv is equally distributed throughout the week. The data is shown graphically below. Use a=0.01

day number of minutes
sunday 200
monday 112
tuesday 123
wednesday 130
thursday 160
friday 225
saturday 247

what is the null hypothesis?

a)children spend diffeent amounts of time watching tv each day
b)children spend less than 2.6 hrs a day watching tv
c)children spend the same amount of time watching tv each day
d)children spend more time watching tv on weekends

Find the expected value

a)171
b)120
c)112
d)247

Reference no: EM13153816

Questions Cloud

What is the standard deviation of the complete portfolio : Consider the following capital market: a risk-free asset yielding 1.75% per year and a mutual fund consisting of 65% stocks and 35% bonds. The expected return on stocks is 12.50% per year and the expected return on bonds is 3.25% per year. The standa..
Total contribution margin-variable costing approach : Clubb Company, which has only one product, has provided the following data concerning its most recent month of operations: The total contribution margin for the month under the variable costing approach is:
Profit-sharing plans : Define and discuss profit-sharing plans and also the advantages. Additionally, critics of profit sharing plans maintain that these plans do not motivate employees to perform at higher levels. Under what conditions are profit sharing plans not likely ..
Maximization of company operating margin : Determine the product mix for statues that allows maximization of the company's operating margin.
What is the null hypothesis and expected value : A sociologist wanted to determine whether there was a difference in the amount of time children aged 5-7 spent watching tv. what is the null hypothesis? Find the expected value.
Outline a micro-economic reform issue : Outline a micro-economic reform issue that is relevant to the Australian economy market and how successful do you think these reform measures were and say why referring to some data or research that has been performed.
What was the perrcentage of h2o2 in the sample : If 43.2 ml of 0.105 M KMnO4 were required to reach the endpoint of a 14.8g bleach sample, what was the perrcentage of H2O2 in the sample?
Fixed- and variable-cost pools : Suppose fixed- and variable-cost pools were allocated separately. Specify how each pool should be allocated. Compute the cost allocated to the Public Works Department in August.
What is the variance of this portfolio? : a. If your portfolio is invested 40% each in A and C, and 20% in B, what is the portfolio expected return?  b. What is the variance of this portfolio?  c. What is the standard deviation of this portfolio?

Reviews

Write a Review

Basic Statistics Questions & Answers

  Contrast quanitative and qualitative research

Compare and contrast quantitative and qualitative research designs. Identify and discuss some advantages and disadvantages for each type of research.

  Finding regression model using anova table

Using ANOVA summary table, find out if regression model is significant.

  Determine various information concerning consumer behavior

A sample of 500 respondents was selected in a large metropolitan area to determine various information concerning consumer behavior, Among the questions asked was "Do you enjoy shopping for clothing?

  Determine confidence interval for mean time wired subscriber

Internet is 13.4 hours per week, with the sample standard deviation of 6.8 hours. Determine the 95 percent confidence interval for mean time Wired subscribers spend on Internet.

  Determine the values for statistical measures

What does the standard deviation mean? Interpret the standard deviation relative to the average or mean?

  Make a histogram of data using parametric t test

Make a worksheet in Excel for your calculations. (b) Make a histogram of the data. Would you be justified in using a parametric t test that assumes normality?

  To find the equation of the line of best fit

To find the equation of the line of the best fit

  Estimating the mean amount of time

Could the interval be used to estimate the mean amount of time a 9-year-old American spends eating & drinking each day. Explain.

  Is the population proportion of females equal to given value

A random sample of 72 graduate students generated the following 90% confidence interval: (0.438, 0.642). Based on the interval above, is the population proportion of females equal to 0.60?

  Find average yearly income using p-value approach

Use the p-value approach and test to determine if the average yearly income of marketing managers in the East is significantly different from the West.

  Probability-reliability-graph hazard

A particular product is known to have an exponential failure time distribution with a mean of 12 months.

  Hyopthesis testing and z-distribution of new process

A new process has been implemented and it is stated to have an average cycle time of 120 seconds. A sample of 50 cycles yielded an average cycle time of 115 seconds, with a standard deviation of 2 seconds.

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