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Montano1993 [528]
3 years ago
15

Jessica knows that the adult population gets, on average, eight hours of sleep each night. A hypothesis test can help her see if

college students are different from the adult population. Jessica tabulated that her sample of 101 students got an average of 6.9 hours of sleep each night, with a standard deviation of 2.5. Using the data provided and the formula below, what is the t-statistic that Jessica calculates? Answer choices are rounded to the hundredths place.
Mathematics
1 answer:
Nitella [24]3 years ago
6 0

Answer:

-4.42

Step-by-step explanation:

Given the following :

Population mean (pm) = 8 hours

Sample mean (sm) = 6.9 hours

Number of observations (n) = 101 students

Sample standard deviation (sd) = 2.5

Using the t-statistic formula :

[(sm - pm) / (sd/√n)]

Hence,

[(6.9 - 8) / (2.5/√101)]

[(-1.1) / (2.5/10.05)]

-1.1 / 0.2487562

= −4.422

The test statistic = - 4.42 to the nearest hundredth.

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Answer:

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Step-by-step explanation:

We are given x=- 3 , y= 6 and z= -4.

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Substitute -3 in for x and 6 in for y.

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-15+(-x)+y evaluated at x= -3 and y=6 is equal to -6.

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3 years ago
A baseball manager is determining the batting order for the team. The team has 9 players, but the manager definitely wants the p
Rina8888 [55]

40320 batting orders are possible.

Since the pitcher bats last, there is only one choice for the 9th slot. For the 1st slot, there are 8 choices remaining. For the 2nd slot, there are 7 choices remaining, etc.

So the number of possible batting orders is:

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Since the pitcher bats last, there is only one choice for the 9th slot. For the 1st slot, there are 8 choices remaining. For the 2nd slot, there are 7 choices remaining, etc.

So the number of possible batting orders is:

8*7*6*5*4*3*2*1 = 8! = 40,320

factorial, in mathematics, the product of all positive integers less than or equal to a given positive integer and denoted by that integer and an exclamation point. Thus, factorial seven is written 7!, meaning 1 × 2 × 3 × 4 × 5 × 6 × 7. Factorial zero is defined as equal to 1.

Factorials are commonly encountered in the evaluation of permutations and combinations and in the coefficients of terms of binomial expansions .

Learn more about ORDER:

brainly.com/question/4313883

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brainly.com/question/4313883

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1 year ago
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scZoUnD [109]

Answer:

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Step-by-step explanation:

because half of 4 (Which is the width of the flower garden) is 2 (Which would be the width of the Vegetable garden.

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