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A) Draw ogives from the following data and measure the median value. Verify it by actual calculation
Central size
5
15
25
35
45
Frequency
11
21
16
10
B) Complete the following distribution if its median is 2600 and compute the value of arithmetic mean
Size
1000-1500
1500-2000
2000-2500
2500-3000
3500-4000
4500-5000
5000-6000
Total
120
?
400
500
50
20
1500
Briefly discuss a real-world example when the solution of a system of inequalities must be in the first quadrant?
Mr. Pickwick takes his umbrella. When rain is not forecast, he takes it with probability 1/3. Find: (a) the probability that Pickwick has no umbrella, given that it rains.
An investor wants to assess at confidence level of 98% if a medicament can improve the marks of students. He notices that for the following daily dozes: 2,2.5,3,4.5,7 mg, the improvement over the students that studied the same but took no mental b..
What is the equation for least squares line? Calculate the coefficient of determination.
A group of items of data have been found to be normally distributed with a mean of 80 and a standard deviation of 6. Please convert 80 to a z-score and show the calculation.
Find a 95% confidence interval estimate of the average salary for all chemists at the Dull Chemical Company. Assume that chemists' salaries are normally distributed.
The team wins 55% of their night games, and 85% of their day games. According to today's newspaper, they won yesterday. What is the probability the game was played at night?
The height in inches of girls on a high school girls basketball team are as follows: Identify the z score used in a quantile plot for the player with a height of 66.5 inches.
Explain in your own words why the test statistic for Goodness-of-Fit is similar to the calculation for Population Standard Deviation.
1. A developer wants to claim that his new "green" home design results in lower electricity use than in conventional homes. His 2,000 square foot model home uses 1,200 kilowatt hours per month on average.
Find the probability that is a sample of 30eruption intervals the average interval of time between eruptions was more than 75 minutes.
The process is monitored using a sample size of 20. Calculate the upper and lower control limits. Give your answers to 2 decimal places.
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