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VLD [36.1K]
3 years ago
7

he pulse rates of 179 randomly selected adult males vary from a low of 43 bpm to a high of 115 bpm. Find the minimum sample size

required to estimate the mean pulse rate of adult males. Assume that we want 90​% confidence that the sample mean is within 3 bpm of the population mean. Complete parts​ (a) through​ (c) belo
Mathematics
1 answer:
malfutka [58]3 years ago
5 0

Answer:

97

Step-by-step explanation:

Given that:

Low = 43bpm

High = 115 bpm

Error = 3

α = 90%

To find the range estimate :

Standard destviation = (high - low) / 4

Standard deviation = (115 - 43) / 4

Standard deviation = 72/4 = 18

The sample size,(n) :

n = [(Zα/2 * sd)/E] ²

2 - tail = (Zα/2) = 1.645

[(Zα/2 * sd)/E] ² = [(1.645 * 18) / 3]² = (29.61/3)²

= 97.41

Sample size = 97

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Convert reduce to lowest terms: 75% to a fraction
marissa [1.9K]

Answer:

3/4

Step-by-step explanation:

75% can be like quarters, 4 quarters make up a dollar therefore 4 quarters is 100%, 2 quarters is half a dollar therefore 50%, and 3 quarters is 75% like how 3 quarters value to 75 cents

6 0
3 years ago
On a piece of paper, use a protractor to construct a triangle with angle measures of 40° and 60º.
Dvinal [7]

Answer:

80

Step-by-step explanation:

every triangle, no matter what shape or size, will have all angles add up to 180 degrees so 180-40-60=80

7 0
2 years ago
Jodi poured herself a cold soda that had an initial temperature 36 degrees F and immediately went outside to sunbathe where the
mr Goodwill [35]

this can be solve using newtons heating of cooling

(Ts – T) =(Ts – To)*e^(-kt)

Where Ts is the ambient temperature

To is initial temperature

T is the temperature at time t

t is the time

k is constant

fisrt solve the constant k for the given first scenario

(99 – 36) = (99 – 46)*e(-5k)

K = -0.0346

Using k, solve T at t = 13 min

(99 – 46) = (99 – T)*e(-13*(-0.0346)

T = 58.82 degree F

4 0
3 years ago
Camille bought 3 pounds of nuts for $10.35 what is the unit price per pound
amid [387]

10.35 \div 3 = 3.45
the unit price per pound is $3.45
5 0
3 years ago
Addition (must show work) can someone solve 1. m + 13 =29 2. z + x =34 <br><br> 3. 87 + p = 136
azamat

Greetings ! Your Answer Is Below.

Answer;

1. m = 16

2. x = -z + 34 or z = -x + 34

3. p = 49

Step-by-step explanation;

1. m + 13 - 13 = 29 - 13       | Subtract 13 from both sides ( m = 16 )

2. - z + 34                          | Add -z to both of the sides ( x = - z + 34 )

Or - x + 34                         | Add -x to both of the sides ( z = - x + 34 )

3. 136 - 87 = 49                 | Subtract 87 from both sides ( p = 49 )

[ Hope This Helped ! ]

3 0
2 years ago
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