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General scores on academic performance in english language using 60 participant. let the highest score be 90 and 10. use a class inertval of 10 create your class interval and frequency and use the information to answer the following: the mean, median, mode, 3rd quartile, 7th decile, 75th percentile, variance and standard deviation.
What is the 99% confidence interval for the true proportion of all e-mail subscribers that opened the e-mail within 24 hours of receiving it?
Nine percent of undergraduate students carry credit card balances greater than $7,000. Suppose 10 undergraduate students are selected randomly to be interviewed about credit card usage.
Use the hypergeometric formula to find this probability. The lottery commission also pays if a contestant matches 4 or 5 of the 6 winning numbers. Hint: Divide the 44 numbers into two groups, winning numbers and nonwinning numbers.
Diastolic blood pressure (DBP) values were measured for 150 patients using two medical devices. The mean DBP values using the two devices are 120 and 122 respectively. Also the standard deviation of the difference of the measurements is 0.634. Te..
compute the correlation coefficient for the data below. what is the equation for the regression line if n=7, Ex=69, Ey=528 Exy=4754 and Ex^2=825
From historical data, Harry's Car Wash estimates that dirty cars arrive at the rate of 10 per hour all day Saturday. With a crew working the wash line, Harry figures that cars can be cleaned at the rate of one every 5 minutes.
Any person who is familiar with these trees understand the height of a California redwood tree which is related to another characteristics of the tree.
Plan the scatter diagram
A local consultant randomly selects a sample of 36 meals whose mean price is determined to be $8.75. Assuming that σ = $0.75, calculate a 95% confidence interval for the population mean price.
Using the telephone numbers listed in your local directory as your population, randomly obtain 20 samples of size 3. From each telephone number identified as a source, take the fourth, fifth, and sixth digits.
A sample of 60 night-shift workers showed that the mean number of units produced was 351. At the .05 significance level, is the number of units produced on the night shift larger?
Gigi has rolled a natural on four straight tosses of the dice. This excites the gamblers standing around the table.
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