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Complete the hypothesis for a proportion test. Show all steps Null and alternate hypothesis, diagram, critical value, test statistic. Reject or do not reject conclusion.
Sally Inc. surverys customer satisfaction. Of 144 customers and finds that 108 are satisfied. What is the point estimate of p the population percentage satisfied?
The average tenure of technicians at ABC Company is 10 years with a standard deviation of 5 years. Calculate the z-score and determine the corresponding percentage for the following question. Please
The t distribution has more area in the tails and less in the center than does the standard normal distribution
When we say a statistical test procedure is not robust, that means
If we are testing for the difference between the means of 2 related populations with samples of n1 = 30 and n2 = 30, the number of degrees of freedom is equal to
The following data is the Square Footage (in Thousands of Square Feet) and Annual Sales (in Millions of Dollars) for a Sample of 14 branches of Sunflowers Apparel. Construct a scatter plot. Determin
The following data is the Square Footage (in Thousands of Square Feet) and Annual Sales (in Millions of Dollars) for a Sample of 14 branches of Sunflowers Apparel. Construct a scatter plot
A local business school claims that its graduating seniors get higher-paying jobs than the national average for business school graduates. Last year's figures for salaries paid to all business schoo
In a study of facial behavior, people in a control group are times for eye contact in a 5-minute period. Their times are normally distributed with a mean of 184.0 seconds and a standard deviation of
You want to compare the daily sales for two different designs of Web pages for your internet business. You assign the next 62 days to either Design A or Design B, 31 days each. The summary statistic
If 3 different factor levels show a lot of variation between levels this implies: A large amount of error within each level therefore the ANOVA will not be accurate
In an experiment designed to study the effects of illumination level on task performance, subjects were required to insert a fine-tipped probe into the eyeholes of ten needles in rapid succession bo
The sample standard deviation of sodium concentration in eels blood (mEq/L) for m = 20 marine eels was found to be s1=40.5 whereas the sample standard deviation of concentration for n = 20 freshwate
A summary data on proportional stress limits for specimens constructed using two different types of wood are shown below:
Does the data provide compelling evidence for concluding that true average strength for the 1078 grade exceeds that for the 1064 grade by more than 10 ? Test the appropriate hypotheses using the -va
A survey of 100 recent fatal traffic accidents showed that 60 were alcohol-related. Find the 95% confidence interval of the true proportion of people who die in alcohol-related accidents.
Create your own original Linear Programming problem with a minimum of two variables and two constraints. Your problem should be presented in paragraph form and reflected in a LP equation, showing th
A real estate research firm monitors the cost of apartment rentals in a large Newfoundland city. The mean rental rate for a two bedroom apartment in 2006 was 850 per month.
A major chain of food stores wants to determine the proportion of customers who buy on impulse. The company decided to use a sample large enough to estimate the proportion of impulse buyers within 2
Write a problem which requries the reader to calculate standard scores (also called a z-scores) and use these to find percentages of the population whose data falls in a given rannge.
Three experiments investigating the relation between need for cognitive closure and persuasion were performed. Part of the study involved administering a "need for closure scale" to a group of stude