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A poll found that 38% of male voters and 46% of female voters support a particular candidate. To test whether this candidate has equal levels of support between male and female voters, the null hypothesis should be
a) . H0 : pmale =pfemale b) . H0 : pmale =50 % , H0 : pfemale= 50 %c) . H0 : pmale =38 % , H0 : pfemale= 46 % d) H0 : pmale <pfemale .
Ann and Jim, two employees in a fast-food restaurant, play the following game while waiting for customers to arrive: Jim pays Ann 2 cents if the next customer does not arrive within 1 minute; otherwise, Ann pays Jim 2 cents. Determine Jim's averag..
According to a recent survey, 275 of 400 middle-aged Americans said they used the Internet regularly. 140 of 400 senior citizens said they used the Internet regularly.
Discuss the factors which might cause variation in the weight of Tootsie Rolls during manufacture.
A sample of twenty automobiles was taken, and the miles per gallon (MPG), horsepower, and total weight were recorded. Develop a linear regression model to predict MPG using horsepower as the only independent variable. Develop another model with weig..
Use this information to compute a 95% confidence interval for average number of credit cards carried by students.
A sample of 10 persons is used to measure the effectiveness of two massage techniques. The effectiveness of the techniques is measured by the number of days that pass by before the subjects feel the need for another massage session.
The following data provided by a coffee company are the roast time in minutes for five batches of coffee (x) and the resulting shrinkage in percent of the coffee weight(y).
The number of items rejected daily by the manufacturer because of defects for last 30 days are:
Do you think that all random samples taken from the same population will lead to the same result?
A month of sales data are collected on sales of different types of computer products Run the t-tests to determine:
a) Test whether there is a difference between attitudes in the 2 cities. Use a 95% alpha. b) What does your result say about attitude consistency across cities?
Create Frequency Distribution of Sample Mean. Compute and Identifies Sampling Distribution of Sample Mean.
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