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Shalnov [3]
2 years ago
14

Determine whether the sampling method is random,systematic,or stratified.

Mathematics
1 answer:
Oksi-84 [34.3K]2 years ago
4 0

Answer:

systematic

Step-by-step explanation:

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Find the 15th term of the arithmetic sequence 13,8,3,-2
Lunna [17]

Answer:

-57

Step-by-step explanation:

13,8,3,-2 (decreasing by 5)

13,8,3,-2,-7,-12,-17,-22,-27,-32,-37,-42,-47,-52,-57.

The 15th term is -57.

<u><em>Ace</em></u>

4 0
2 years ago
Suppose that the quarterly sales levels among health care information systems companies are approximately normally distributed w
cupoosta [38]

Answer:

The cutoff sales level is 10.7436 millions of dollars

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 12, \sigma = 1.2

15th percentile:

X when Z has a pvalue of 0.15. So X when Z = -1.047.

Z = \frac{X - \mu}{\sigma}

-1.047 = \frac{X - 12}{1.2}

X - 12 = -1.047*1.2

X = 10.7436

The cutoff sales level is 10.7436 millions of dollars

6 0
3 years ago
Tracy has a picture of her mom a picture of her dad and a picture of her dog she has a black frame and a white frame. what is th
notsponge [240]
How many more frames does Tracy need?
5 0
3 years ago
Read 2 more answers
A square postage stamp has area 1240 mm^2 about how long is each side?
Shtirlitz [24]
Sq.root of 1240 is approx 35 mm
6 0
3 years ago
Evaluate 8 divided by 4 times (11-8+2)
luda_lava [24]
<u>well 8 divided by 4 is 2 and 11-8+2 is 5 and 5 times 4 is 20 so 20 is the answer

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3 years ago
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