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Bess [88]
2 years ago
11

Dr. Snycerski computed a confidence interval for the mean number of alcoholic beverages consumed per week in a random sample of

US college students. The 95% confidence interval is 3 to 6. What does this confidence interval tell us about the mean number of alcoholic beverages consumed per week by the population of all US college students
Mathematics
1 answer:
mr_godi [17]2 years ago
7 0

Answer:

We are 95% sure that the true mean number of alcoholic beverages consumed per week by the population of all US college students is between 3 and 6.

Step-by-step explanation:

x% confidence interval:

A confidence interval is built from a sample, has bounds a and b, and has a confidence level of x%. It means that we are x% confident that the population mean is between a and b.

In this question:

95% confidence interval is between 3 and 6.

This means that we are 95% sure that the true mean number of alcoholic beverages consumed per week by the population of all US college students is between 3 and 6.

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Using a 16-sided number cube, what is the probability that you will roll a multiple of 4 or an odd prime number? The number 1 is
iogann1982 [59]
<h3>Answer: 0.563 (choice C)</h3>

================================================

Explanation:

E = event space

E = set of outcomes we want to happen

E = rolling a multiple of 4 or rolling an odd prime number

E = {4,8,12,16     3,5,7,11,13}

n(E) = number of items in set E

n(E) = 9, (four multiples of 16+five ways to roll odd prime number)

-----

S = sample space

S = set of all possible outcomes (whether we want them to happen or not)

S = {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16}

n(S) = number of items in set S

n(S) = 16

-----

P(E) = probability of event space occurring

P(E) = probability of rolling a multiple of 4 or rolling an odd prime number

P(E) = n(E)/n(S)

P(E) = 9/16

P(E) = 0.5625

P(E) = 0.563

3 0
2 years ago
A recipe for 11 pizza crust calls for 3838 tablespoon of salt. How much salt is needed to make 33 pizza crusts?
max2010maxim [7]
Its 11,514 tablespoons of salt
8 0
2 years ago
Sylvia invested $500 in an account compounded annually with an interest rate of 8%. Manuel invested $600 in an account with a co
Sav [38]
Syliva
T=72÷8=9 years

Manul
T=72÷7.25=9.9=10 years

Option A
8 0
2 years ago
Read 2 more answers
Calculate cos theta to two decimal places. <br><br> A. 0.69<br> B. 1.38<br> C. -0.07<br> D. 0.77
alexgriva [62]

Answer:

A. 0.69

Step-by-step explanation:

We need to use cosine theorem:

c²=a²+b² - 2ab* cos(θ)

c=8, a=7, b=11

8² = 7²+11² - 2*7*11 *cos(θ)

64 = 49 + 121 - 154*cos(θ)

64 - 170 = - 154*cos(θ)

- 106/ (- 154) = cos(θ)

cos(θ) = 0.69

4 0
2 years ago
Read 2 more answers
A population of butterflies grows in such a way that each generation is simply 1.5 times the previous generation. There were 350
kap26 [50]

Answer:

378.5 or just 378

Step-by-step explanation:

This is a linear model with x representing the number of generations that's gone by, y is the number of butterflies after x number of generations has gone by, and the 350 represents the number of butterflies initially (before any time has gone by.  When x = 0, y = 350 so that's the y-intercept of our equation.)

The form for a linear equation is y = mx + b, where m is the rate of change and b is the y-intercept, the initial amount when x = 0.

Our rate of change is 1.5 and the initial amount of butterflies is 350, so filling in the equation we get a model of y = 1.5x + 350.

If we want y when x = 19, plug 19 in for x and solve for y:

y = 1.5(19) + 350

y = 378.5

Since we can't have .5 of a butterfly we will round down to 378

7 0
2 years ago
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