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lesantik [10]
3 years ago
7

У

Mathematics
1 answer:
Shtirlitz [24]3 years ago
8 0

Answer:

pkease right the question properly please

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A distribution has a mean of 90 and a standard deviation of 15. Samples of size 25 are drawn randomly from the population. Find
raketka [301]

Answer:

The probability is 0.04746

Step-by-step explanation:

Firstly, we calculate the z-score here

Mathematically;

z-score = x-mean/SD/√n

Where from the question;

x = 85, mean = 90 , SD = 15 and n = 25

Plugging these values into the equation, we have;

Z = (85-90)/15/√25 = -5/15/5 = -1.67

So the probability we want to calculate is ;

P(z > -1.67)

We use the standard normal distribution table for this;

P(z > -1.67) = 0.04746

4 0
3 years ago
In the diagram below, is the perpendicular bisector of JK. Which of the following statements must be true?
FinnZ [79.3K]
I need some details... If i can get a little more details with that "check all that apply" and i could get you an answer.
3 0
3 years ago
James Priya and Siobhan work in a grocery store James makes 9.00!per hour Priya makes 40% more than James and Siobhan makes 15%
ki77a [65]
<h2><em>James has $9 </em></h2><h2><em>Priya has $10.80 </em></h2><h2><em>Siobhan has $9.18 </em></h2><h2><em>because 9*20% is 1.8 so add that to 9 to get 10.80 then times 10.80 by 15% to get 1.62 so you subtract 1.62 from 10.80 to get $9.18  </em></h2>

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5 0
2 years ago
Please help! I need help with part B if 1000 students were surveyed what would the probability be of how many plays sports?
nevsk [136]

Answer:

188 students would play sports, out of 1,000.

Step-by-step explanation:

If the probability that a random high school student plays a sport is 0.188 (150/800), which means for every 1 high school student 0.188 of them play a sport. Multiply 0.188x1,000 to get 188 students who play a sport.

5 0
2 years ago
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The engine life for a certain brand of lawn mower is modeled by the function f(h) = 50 - 1 3 h where h represents hours used. Wh
Colt1911 [192]

Answer: C. Engine life decreases steady with time.

Step-by-step explanation:

4 0
3 years ago
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