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Natali [406]
3 years ago
15

There are twelve girls and eight boys in a math class. The girls’ mean score on the final exam was 83.5. The boys’ mean score wa

s 81.5. What was the mean for the entire class?
Mathematics
1 answer:
Semenov [28]3 years ago
6 0

Answer:

Step-by-step explanation:

The mean = (83.5 + 81.5)/2

= 165/2

= 82.5

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identify the type i error and the type ii error that corresponds to the given hypothesis. the proportion of people who write wit
djverab [1.8K]

Type I error is:

" Reject the claim that the proportion of people who write with their left hand is 0.29 when the proportion is actually 0.29 "

Type II error is:

"Fail to reject the claim that the proportion of people who write with their left hand is 0.29 when the proportion is actually different from 0.29 "

<u>What is proportion?</u>

An equation in which two ratios are made equal is called a proportion. For instance, you could write the ratio as 1: 3 (for every one boy, there are three girls), which means that 14 of the population is made up of boys and 34 of the population is made up of girls.

In Statistics, a  type I error is the rejection of a true null hypothesis

and  a type II error is the non-rejection of a false null hypothesis

Given that p = 0.29 is accepted

Now type I error is

C. Reject the claim that the proportion of people who write with their left hand is 0.29 when the proportion is actually 0.29

i.e. (false positive)

and type II error here is

B. Fail to reject the claim that the proportion of people who write with their left hand is 0.29 when the proportion is actually different from 0.29.

To learn more about the proportion from the given link

brainly.com/question/19994681

#SPJ4

3 0
1 year ago
Combine any like terms in the expression. If there are no like terms, rewrite the expression.
AlladinOne [14]
Im correct ok ik i am

8 0
3 years ago
After 5 minutes of a basketball game
astra-53 [7]

Answer:

Something happens...

Step-by-step explanation:

7 0
4 years ago
Read 2 more answers
A.Calculate the mean,median and mode.(3 points each) 1.)1,2,3,4,5 2.)2,3,4,5,6,6 3.)6,7,5,4,5,6,2,5
zlopas [31]

Answer:

Step-by-step explanation:

1.)1,2,3,4,5

mean=sum of all values/number of values

         =1+2+3+4+5/5

         =15/5

mean=3

Mode :

In the given data, no observation occurs more than once.

Hence the mode of the observations does not exist, means mode=0.

Median

1,2,3,4,5

Middle value is 3 so the median is 3.

2.)2,3,4,5,6,6

mean=sum of all values/number of values

         =2+3+4+5+6+6/6

         =26/6

mean =4.33

Mode

      is that value of the observation which occurs maximum number of times so here mode is 6.

Median

2,3,4,5,6,6

 4+5/2

9/2

median=4.5

3.)6,7,5,4,5,6,2,5

mean=sum of all values/number of values

         =6+7+5+4+5+6+2+5/8

        =40/8

mean =5

Mode

is that value of the observation which occurs maximum number of times so here mode is 5

Median

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

5+5/2

10/2

median=5

 

5 0
3 years ago
Please Help Calculate!!!
Darina [25.2K]

Answer:

1) 35

2) 1.51937984

Step-by-step explanation:

\frac{4/\frac{4}{7}•0.3}{2.88 ÷ 4.8}

\frac{21}{0.6}

21 ÷ 0.6

35

\frac{0.5 + \frac{1}{18}}{(1\frac{1}{6}-\frac{7}{18}}÷2.8

\frac{\frac{5}{9} }{0.36564625}

\frac{5}{9}÷0.36564625

1.51937984

4 0
3 years ago
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