i) Calculate the mean and variance. ii) Determine the modal value. Hence, interpret its meaning. iii) Given that 25% of the flashlight batteries have a lifespan less than X hours. Calculate the value of X.

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Q: Ages Number of students 15-18 2 19-22 10 23-26 5 27-

A: Ages Number of students 15-18 2 19-22 10 23-26 5 27-30 4 31-34 5 35-38 3

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Q: State the appropriate null and alternative hypotheses. ⒸM₂: MO ⒸM₂ M₂ TO ⒸM₂ M₂ O ⒸM₂: My O M₂: MO…

A: Frist we make table :   Velocity(m/s)     Swimmer Water x Guar Syrup y di=x-y di2 1 0.9 0.93…

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A: We will provide you the solution in next step

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A: Given that  Mean = 86  ,  Standard deviation = 3  Bugs scored = 88

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A: Given info: The mean cost for each item in his bag was $3.19.

Q: If n=11, ¯x(x-bar)=43, and s=10, find the margin of error at a 99% confidence level Give your…

A: Given that  n=11, ¯x=43 and s=10,