Monthly Archives: September 2023

All four ailments

Posted on September 29, 2023 by Sumant Sumant

If 70% of the population have stomach trouble, 75% have weak eyes, 80% have liver ailment and 85% have a touch of catarrh; what percent at least are plagued with all four ailments?”

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Definite Integral x^2e^x

Posted on September 29, 2023 by Sumant Sumant
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SOFD (form, outlier, strength and direction)

Posted on September 28, 2023 by Sumant Sumant
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Explanatory vs Response Variable

Posted on September 28, 2023 by Sumant Sumant

Coral reefs. How sensitive to changes in water temperature are coral reefs? To find out, measure the growth of corals in aquariums where the water temperature is controlled at different levels. Growth is measure by weighing the coral before and … Continue reading →

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Passing Streetcars

Posted on September 28, 2023 by Sumant Sumant

A man walks at 3 mph down a street along which runs a streetcar line. He notices that, while 40 streetcars pass him traveling in the same direction as he walks, 60 pass him in the opposite direction. What is … Continue reading →

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IB HL Statistics question on continuous random variable

Posted on September 26, 2023 by Sumant Sumant
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IB HL Solving for complex numbers

Posted on September 26, 2023 by Sumant Sumant
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Some common change of base log questions in Precalculus

Posted on September 26, 2023 by Sumant Sumant
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AP Statistics: Using 5 point summary to determine if its a normal distribution

Posted on September 26, 2023 by Sumant Sumant

A study recorded the amount of oil recovered from the 64 wells in an oil field, in thousands of barrels. Here are the descriptive statistics for that set of data from a statistical software. Note: The Mean and median are … Continue reading →

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AP Statistics Dot plot, percentile and z score

Posted on September 26, 2023 by Sumant Sumant

The dotplot gives the sale prices of 40 houses in Ames, Iowa, sold during a recent month. The mean sale price was $203,388 with standard deviation of $87,609. a) Find the percentile of the house indicated in red on the … Continue reading →

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