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Rina8888 [55]
2 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]2 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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77julia77 [94]

Answer:

y=2x-1

Step-by-step explanation:

8 0
3 years ago
You earn $5 for every driveway you shovel in a snowstorm. How many driveways do you need to shovel to earn $65?
Aleksandr [31]

Answer:

13

Step-by-step explanation:

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7 0
2 years ago
The Drury Lane Theater has 10 seats in the first row and 38 rows in all. Each successive row contains one additional seat. How m
densk [106]

Answer:

1083 seats

Step-by-step explanation:

this is an arithmetic sequence :

an = an-1 + c

in our case

a1 = 10 (10 seats in the first row)

a2 = a1 + 1 = 10 + 1 = 11

a3 = a2 + 1 = a1 + 1 + 1 = 10 + 1 + 1 = 12

an = an-1 + 1 = a1 + (n-1)×1 = a1 + n - 1 = 10 + n - 1 = 9 + n

a38 = a1 + 37 = 10 + 37 = 47 seats.

altogether this means the sum of the arithmetic sequence of a1 to a38.

the general sum of an arithmetic sequence from a1 to an is

n×(a1 + an)/2

in our case

38×(10 + 47)/2 = 19×57 = 1083 seats

3 0
2 years ago
What is the answer to 336 is 48% of what number?
Doss [256]
Is means =
'of' means multiply
percent means parts out of 100 so 48%=48/100=4.8/10=0.48/1=0.48
 so it is
336=0.48 times something
divide both sides by 0.48
700=something
the numbe ris 700
7 0
3 years ago
Your doctor told you to eat 25 grams of fiber each day. You had 4 grams of fiber for breakfast. What percent of the 25 grams of
Pie
16%

if you multiply 25 grams buy 4 you get 100 (100%) then you mulitply 4 by 4 which gives you 16 (16%)
7 0
3 years ago
Read 2 more answers
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