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victus00 [196]
3 years ago
11

In a random sample of 75 individuals, 52 people said they prefer coffee to tea. 99.7% of the population mean is between what two

values?
Mathematics
1 answer:
marshall27 [118]3 years ago
7 0
Sample size, n = 75
Point estimate, p = 52/75 = 0.693
Z at 99.7% confidence interval ≈ 2.96

Population mean interval = p+/- Z*Sqrt [p(1-p)/n]

Substituting;
Population mean interval = 0.693 +/- 2.96*Sqrt [0.693(1-0.693)/75] = 0.693+/-0.158 = (0.535,0.851) or (53.5%,85.1%)
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Johnson and Jocatol Ltd. owned a business office with floor measuring 15 m by 8 m which was to be carpeted. The cost of carpetin
SVEN [57.7K]

Cost of painting is GHe 109,320

<u>Given:</u>

Floor measure = 15 m by 8 m

Cost of carpeting = GHe 890 per square meter

Total cost of painting and carpeting = GHe 216,120

<u>Find:</u>

Cost of painting

<u>Computation:</u>

Area of floor = 15 × 8

Area of floor = 120 square meter

Cost of carpeting = 120 × 890

Cost of carpeting = GHe 106,800

Cost of painting = Total cost of painting and carpeting - Cost of carpeting

Cost of painting = 216,120 - 106,800

Cost of painting = GHe 109,320

Learn more:

brainly.com/question/14094934?referrer=searchResults

5 0
3 years ago
Suppose you Just purchased a used truck. The number of miles on the odometer can be represented by the equation y = x + 40, 000,
igor_vitrenko [27]

Answer: f(x)= x+40000

Step-by-step explanation:

We write a function f(x) which gives the values of the function that are dependent on the independent variable "x".

Given: The number of miles on the odometer can be represented by the equation y = x + 40, 000, where y is the number of miles on the odometer, and x is the number of miles you have driven it.

Here y is dependent on x, so we replace y by f(x), then we get

f(x)= x+40000   which is the required answer.

8 0
3 years ago
4.) A bag contains 10 red marbles and 5 blue marbles. You randomly select 3 marbles from the bag. What is
sesenic [268]

Answer:

a) 1/27

b) 2/91

Step-by-step explanation:

A bag contains 10 red marbles and 5 blue marbles (15 marbles in total). You randomly select 3 marbles from the bag.

a) You replace each marble before selecting the next one.

The probability of selecting one blue marble is

\dfrac{5}{15}=\dfrac{1}{3},

then the probability that all 3 marbles are blue is

\dfrac{1}{3}\times \dfrac{1}{3}\times \dfrac{1}{3}=\dfrac{1}{27}

b) You do not replace each marble before selecting the next one. Each time the number of blue marbles decreases by 1 and the total number of marbles decreases by 1 too. So the probability that all 3 marbles are blue is

\dfrac{5}{15}\times \dfrac{4}{14}\times \dfrac{3}{13}=\dfrac{2}{91}

7 0
3 years ago
in a tournament, amanda scored 136 points in the first round and 127 points in the second round whatwas her percentage change be
skelet666 [1.2K]
Percent change = (new number - old number)/(old number) * 100

percent change = (127 - 136)/(136) * 100

percent change = -6.62%

Since the percent change is negative it is a percent decrease.

Answer: 6.62% decrease.
5 0
3 years ago
What is 9 divided by 883
Masteriza [31]
9 divided by 883 is 0.010192525481314

How:
i used a calculator
8 0
3 years ago
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