I NEED ANSWERS TO A AND B ASAP THIS TEST ENDS IN 2 HRS
2 answers:
Answer:
200.3 cm
210 cm
Step-by-step explanation:
to find the mean add all the numbers up and then divide it by the total number sampled
so we have
(198+199*3+200*2+201*5+202*2)/13
which gives you around 200.3
To find the height of the new player we have the following equation
let x be the height of the new player
solve for x and get
210 cm
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Answer:
The upper limit of a 95% confidence interval for the population mean would equal 83.805.
Step-by-step explanation:
The standard deviation is the square root of the variance. Since the variance is 25, the sample's standard deviation is 5.
We have the sample standard deviation, not the population, so we use the t-distribution to solve this question.
T interval:
The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So
df = 15 - 1 = 14
Now, we have to find a value of T, which is found looking at the t table, with 14 degrees of freedom(y-axis) and a confidence level of 0.95(). So we have T = 1.761
The margin of error is:
M = T*s = 1.761*5 = 8.805.
The upper end of the interval is the sample mean added to M. So it is 75 + 8.805 = 83.805.
The upper limit of a 95% confidence interval for the population mean would equal 83.805.