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olganol [36]
3 years ago
10

A random sample of 300 students was found to have a mean height of 64 inches and a standard deviation of 2.3 inches. What is the

standard error of the mean? (Assume that the population from which the 300 students are drawn is much larger than 300.)
Mathematics
1 answer:
irakobra [83]3 years ago
4 0

Answer:

54

Step-by-step explanation:

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Find the interquartile range (IQR) of the data in the dot plot below. chocolate chips 0 0 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10
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*The dot plot is shown in the attachment below

Answer:

2

Step-by-step explanation:

Interquartile range is the difference between the upper median (Q3) and the lower median (Q1).

First, let's write out each value given in the data. Each dot represents a data point.

We have:

2, 3, 3, 4, 4, 4, 4, 5, 5, 6, 7

=>Find the median:

Our median is the middle value. The middle value is the 6th value = 4

==>Upper median Q3) = the middle value of the set of data we have from the median to our far right.

2, 3, 3, 4, 4, |4,| 4, 5, [5], 6, 7

Our upper median = 5

==>Lower median(Q1) = the middle value of the data set we have from our median to our far left.

2, 3, [3], 4, 4, |4,| 4, 5, 5, 6, 7

Lower median = 3

==>Interquartile range = Q3 - Q1 = 5-3 = 2

3 0
3 years ago
The length of Marianna's dress measures 1 1/4 yards. She hems the dress, makint it 3/8 yard shorter. How long is her dress now?
ser-zykov [4K]

Answer:

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Step-by-step explanation:

1 1/4- 3/8

first change 1 1/4 to an improper fraction: 5/4

next, find common denominator which is 8

5/4=10/8

10/8-3/8=7/8

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3 years ago
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