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A researcher used an anova to cmpare 4 treatment conditions with a separate sample of n=9 participants in each treatment. Calculate the missing values in the following. The F ratio is = 5.00 between treatments SS DF Ms If withing treatments has a SS of 96, what is the degree of fredom and MS.
A quality-control manager randomly selects 70 bottles of ketchup that were filled on S1 to assess the calibration of the filing machine. Determine the population study?
Give a point estimate for the difference between the proportion of college-aged women and the proportion of college-aged men who are registered to vote.
If out of a random sample of college students expressed an intent to vote, can the aide's estimate be rejected at the level of significance? Perform a one-tailed test.
From these statistics she calculates a 90% confidence interval of [20.9 grams, 25.1 grams]. What can the researcher do to decrease the width of the confidence interval?
By definition, these are not consistent - e.g. the effect of temperature is different at the two photo-periods. What to do if an interaction is present?
A university wants to determine the proportion of students who use a cash card to pay at the university food service. Out of 100 students surveyed, 65 students use a cash card. Estimate the value of the population proportion.
To revise an existing inventory system, a company needs to know something about the lead time for orders it places for a critical part. The company looks at the last 20 orders placed and finds that the lead time in days are:
A random sample of 52 groups gave a mean of $8.30 with a standard deviation of $2.42. Find a 90% confidence interval for the mean amount left by all groups.
Employer wishes to interview only those applicants who score in top 15%. What must cut-off score be for interviews?
What is the probability that the part can be assembled in 7 minutes or less? What is the probability that the part can be assembled between 3.5 and 7 minutes?
If random sample of thirty six customer transactions points out that sample mean withdrawal amount is $172, is there evidence to think that population mean withdrawal amount is no longer $160? Determine the mean of data above?
The standard deviation equaled five days. Assuming that the distribution is normal, what percent of the invoices were paid within 15 days of receipt?
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