It has been extended that the normal and standard deviation of the measure of time spent web based utilizing the Internet are, separately, 14 and 17 hours for each individual each year (many don't utilize the Internet by any stretch of the imagination!).

a What worth is by and large 1 standard deviation beneath the mean?

b If the measure of time spent web based utilizing the Internet is around regularly conveyed, what extent of the clients invest a measure of energy online that is not exactly the worth you found partially (a)? (Is there an approach to address this and not utilize the standard typical table? Assuming this is the case, if it's not too much trouble, clarify.

One understudy applies for a doctoral program in Economics. The capability of the confirmation relies upon GRE score, GPA in his undergrad and graduate schools, three proposal letters, and other strong documentations. Since this is a top program and a top college in the United States, all out number of candidates is 750, however this program just concedes 25 understudies each year. Subsequently, this understudy guarantees that he has 3.3% likelihood to be conceded. Does this current understudy's case bode well? Why or why not? Examine and clarify your reasons. You should give your factual examination and reasons.

Roughly 13% of the US populace is African American and 76 percent are White. Around 0.7 percent of the US populace is detained. Around 36% individuals imprisoned are African Americans and a similar percent are White.

a) Complete the table beneath, at that point answer the inquiries underneath the table. Offer all responses as percents to 3 decimal spots.

Incarcerated Not Incarcerated Total

African American % % 13%

White % % 76%

Other % %

Total % % 100%

b) What level of African Americans are imprisoned? % Give answer as rate to 3 decimal spots.

c) What level of Whites are imprisoned? % Give answer as rate to 3 decimal spots.

d) what number occasions bigger is the level of African Americans imprisoned contrasted with the level of Whites detained?

(14)

Roughly 1% of ladies ages 40-50 have bosom malignancy. A lady has a 85 percent possibility of a positive test from a mammogram given she has bosom malignant growth (a genuine positive outcome). A lady has a 9 percent possibility of a positive test from a mammogram given she doesn't have bosom malignancy (a bogus positive outcome).

Complete the table beneath, at that point answer the inquiries underneath the table. Offer all responses as decimals to 4 decimal spots.

Positive test result Negative test result Total

Has bosom malignant growth

Doesn't have bosom malignant growth

All out

What is the likelihood a lady has bosom malignant growth given that she just had a positive test?

Offer response as decimals to 4 decimal spots.