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Rina8888 [55]
3 years ago
13

Suppose Matt wants to test the claim that the mean pulse rate of adult males is equal to 69 bpm, since he expects it to be lower

. A random sample of 140 adult males is used and found to have a mean of 68.3 bpm and a standard deviation of 10.7 bpm. Find the value of the test statistic.
Mathematics
1 answer:
dexar [7]3 years ago
6 0

Answer:

z(s)  = - 0.7740

Step-by-step explanation:

Normal Distribution

sample size  n = 140

sample mean 68.3

A ne tailed-test to the left from problem statement

1.-Test hypothesis

H₀           null hypothesis                  μ₀  = 69

Hₐ   alternative hypothesis              μ₀  < 69

2.- To find a value of test statistics  z(s)

z(s)  =  [  ( μ  -   μ₀ ) /( σ /√n )

z(s)  =  ( 68.3 -  69 ) / (10.7/√140)         ⇒  z(s)  = - 0.7*11.83 /10.7

z(s)  = - 0.7740

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3 years ago
Find the GCF of 14 and 15. GCF=
AnnZ [28]

Answer:

1

Step-by-step explanation:

14 - 2 x 7

15 - 3 x 5

GCF of 14 and 15: 1

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2 years ago
Read 2 more answers
Write the letter for each expression in the box under the correct category in the table.
Ad libitum [116K]

Answer:

a) 9+(-3) + (-2)  = 9 -5 = 4> 0  ⇒  Positive Sum

b) -12 +1 +11  = -12  +12 5 =  0  ⇒  Zero Sum

c) -3 +8 + (-4)  = -7 + 8 -5 =-1 <  0  ⇒ Negative Sum

d)  -4+9+(-10) = 9 -14 = -5 <  0  ⇒ Negative Sum

e) 3+(-2) + (-4)  = 3  -6= -3 <  0  ⇒ Negative Sum

f) 2 + (-4) + 2  = 4 -4 =  0  ⇒  Zero Sum

Step-by-step explanation:

Positive Sum is defined as the condition in which the Sum of total of gains and losses is GREATER THAN ZERO.

Zero Sum  is defined as the condition in which the Sum of total of gains and losses is EQUAL TO ZERO.

Negative Sum is defined as the condition in which the Sum of total of gains and losses is LESS THAN ZERO.

Now, here

a) 9+(-3) + (-2)  = 9 -5 = 4> 0  ⇒  Positive Sum

b) -12 +1 +11  = -12  +12 5 =  0  ⇒  Zero Sum

c) -3 +8 + (-4)  = -7 + 8 -5 =-1 <  0  ⇒ Negative Sum

d)  -4+9+(-10) = 9 -14 = -5 <  0  ⇒ Negative Sum

e) 3+(-2) + (-4)  = 3  -6= -3 <  0  ⇒ Negative Sum

f) 2 + (-4) + 2  = 4 -4 =  0  ⇒  Zero Sum

5 0
3 years ago
Mary has read 150 pages of her 250 page book. What percent of her book has Mary read?
aalyn [17]

Answer:

she has read 60% of her book

Step-by-step explanation:

3 0
3 years ago
I REALLYYYYY NEED HELP PLSSSS NO DUM ANSWERS I SERIOUSLY NEED HELP
Inessa05 [86]

Answer:

First blank: 869x

Second blank: 17,575

D

Step-by-step explanation:

Men (f): 389x + 7500

Women (g): 480x + 10075

Equation: (f + g)

Equation: 389x + 7500 + 480x + 10075

Combine like terms

869x + 17575

Equation: 869x + 17,575

5 0
3 years ago
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