I wasteing points on my 12 year old brother but it fine plz help

A survey asked 26 adults how many years of education they had. The sample mean was 13.03 with a standard deviation of 3.22. It i

yulyashka [42]

Answer: (11.95, 14.11)

Explanation:

Let x be a random variable that represent the number of years of education.

Given: Sample size : n= 26

Sample mean : $\overline{x}=13.03$

Sample standard deviation : s = 3.22

Significance level : $\alpha=100\%-90\%=10\%=0.1$

Degree of freedom: df = n-1 = 25

Critical t-value for $\alpha=0.1$ and df = 25 will be

$t_{\alpha/2, df}=t_{0.05,25}=1.7081$

90% confidence interval for mean:

$\overline{x}\pm t_{\alpha/2,df}\dfrac{s}{\sqrt{n}}\\\\=13.03\pm (1.7081)\dfrac{3.22}{\sqrt{26}}\\\\=13.03\pm (1.7081)\dfrac{3.22}{5.09902}\\\\=13.03\pm 1.08\\\\=(13.03-1.08,\ 13.03+1.08)\\\\ =(11.95,\ 14.11)$

A 90% confidence interval for the mean number of years of education = (11.95, 14.11)

5 0

2 years ago

Erikson's _____________ theory was created as an alternative psychodynamic view emphasizing social interaction with other people

nadya68 [22]

Answer:

psychosocial development

Explanation:

Erik Erikson has given the theory of psychosocial development in which he has mentioned eight different stages from infancy or birth of the child to adulthood.

According to Erikson, in each of the stages an individual experiences a particular psychosocial crisis that can often have a negative or positive outcome or result for his or her personality development.

Psychosocial development came into existence after Erikson has criticized Sigmund Freud's psychosexual developmental stage because he believes that a child grows differently throughout the life irrespective of the five stages that Freud has to give. A psychosocial development includes the interaction between psychological development or the social environment.

4 0

3 years ago

Why is HDI necessary?

Aloiza [94]

The HDI is necessary because it was created to emphasize that people and their capabilities should be the ultimate criteria for assessing the development of a country, not economic growth alone. The HDI uses the logarithm of income, to reflect the diminishing importance of income with increasing GNI.

6 0

3 years ago

Read 2 more answers

What will 2022 titan xd’s trailer sway control do when it detects side-to-side swaying of the trailer?.

SOVA2 [1]

The trailer sway control will automatically apply braking to individual wheels if its detects a side-to-side swaying of the trailer.

<h3>What is the trailer sway control?</h3>

The trailer sway control is a features attached to trailers to ensures save landing or control when a swaying action is detected.

In conclusion, the trailer sway control will automatically apply braking to individual wheels if its detects a side-to-side swaying of the trailer.