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VLD [36.1K]
4 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]4 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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3 years ago
The length of two sides of triangle are 4cm and 5cm. Between what two
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Answer:

1 and 9

Step-by-step explanation:

By the Triangle Inequality Theorem, the sum of two side lengths of a triangle is always greater than the length of the third side.

In other words, in a triangle with side lengths a, b, and c, we always have a+b > c.

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2 years ago
The ratio of boys to girls in Ms. Gonzalez's class is 3 to 4. There are 12 girls in the class. What is the total number of stude
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Answer:

there are 21 students in her class.

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3 years ago
The sum of 2 numbers is equal to 10. The difference between those same two numbers is equal to -4 find the numbers.
Akimi4 [234]

Answer:

3 and 7

Step-by-step explanation:

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8 0
3 years ago
A) 10<br>B) 15<br>C) 25<br>D) 40​
dsp73

Answer:

  • A)40 I hope the answer is correct . I will be happy when I get 5 point
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3 years ago
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