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Alex777 [14]
3 years ago
15

Calculate the mean of the given data set. You must show your work to receive all possible points.

Mathematics
1 answer:
Bumek [7]3 years ago
5 0

Answer:

87

Step-by-step explanation:

In math, the mean is the middle number of a sequence.

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How to make my answer for 0.70 a fraction
miss Akunina [59]

Answer:

0.70 = 7/10

Step-by-step explanation:

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2 years ago
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The unit rate of 15 degrees in 2 hours
Neporo4naja [7]
Solution: 7.5 Degrees per hour

Reasoning: 15/2 is equal to 7 1/2 or 7.5
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2 years ago
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A researcher wants to see if birds that build larger nests lay larger eggs. He selects two random samples of nests: one of small
True [87]

Answer:

95% confidence interval for the difference between the average mass of eggs in small and large nest is between a lower limit of 0.81 and an upper limit of 2.39.

Step-by-step explanation:

Confidence interval is given by mean +/- margin of error (E)

Eggs from small nest

Sample size (n1) = 60

Mean = 37.2

Sample variance = 24.7

Eggs from large nest

Sample size (n2) = 159

Mean = 35.6

Sample variance = 39

Pooled variance = [(60-1)24.7 + (159-1)39] ÷ (60+159-2) = 7619.3 ÷ 217 = 35.11

Standard deviation = sqrt(pooled variance) = sqrt(35.11) = 5.93

Difference in mean = 37.2 - 35.6 = 1.6

Degree of freedom = n1+n2 - 2 = 60+159-2 = 217

Confidence level = 95%

Critical value (t) corresponding to 217 degrees of freedom and 95% confidence level is 1.97132

E = t×sd/√(n1+n2) = 1.97132×5.93/√219 = 0.79

Lower limit = mean - E = 1.6 - 0.79 = 0.81

Upper limit = mean + E = 1.6 + 0.79 = 2.39

95% confidence interval for the difference in average mass is (0.81, 2.39)

3 0
2 years ago
Mrs. Levi's class raised $217.35 in one-time donations for the library's new book collection. The class also had 4 people pledge
nexus9112 [7]

Answer: $817.35

Step-by-step explanation:

150x4 = 600

600+217.35 = 817.35

7 0
3 years ago
Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar(s).
Mashcka [7]

Multiplying eqn no. two with 4 we add it up with eqn 1.

4x - 5y = 10 \\  - 4x - 12y = 32 \\

- 17y = 42 \\ y =  \frac{ - 42}{17}

When

- x - 8 = 3y \\ x + 3y =  - 8

x =  - 8 -  3 \frac{ - 42}{17 }  \\ x =  - 8 +  \frac{42}{17}  \\ x =   \frac{ - 10}{17}

So, x = - 10/17 and y = - 42/17.

5 0
3 years ago
Read 2 more answers
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