Stats

Test 1- notes:

Box and whisker plot represents:

* The box covers 50% of the data

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Exhaustive pairs- males and not males

Mean mass of 10 birds eggs = 92.8 grams. One egg weighing 56 grams is removed. What is the mean mass of the remaining egg samples?

* 92.8 +( (98.8-56)/9)

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A meal combo consists of a choice of 5 drinks, 6 mains and 4 salads. The number of different meal combos available, if you have one of each?

* 5 x 6 x 4 = 120

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The shape of display:

* skewed to the right

* skewed to the left

* bimodal

* symmetrical

Equally likely = same amount of slices with pepperoni and mushroom

Independent = either get heads with a coin and a 3 on a die

Exhaustive = mushroom and pepperoni take up whole pizza

Mutually exclusive = either pepperoni or mushroom

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What assumptions can be made = assume all events are independent

A= {x 2 x 50}

B= {x 10 x 50}

C= {x 16 x 20}

* A (B C) = (A B) (A C)

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Coffee machine dispenses 8 ounce cups, the machine is supposed to fill the cups with 7.75 ounces of liquid.

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Coefficient of variation = ( (8-7.75) / 8) x 100

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Capturing error occurred, entered as R500 but meant to be R600, you reconstruct the 99% confidence interval:

* The new confidence interval can be obtained by shifting the old to the right

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Confidence intervals:

A% | Z* |

90% | 1.64 |

95% | 1.96 |

98% | 2.33 |

99% | 2.58 |

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Monthly rent of a new student is added (R870) to the sample, what effect will this have on...