According to the Empirical Rule, approximately how many standard deviations from the mean include about 95% of the data?

A community intervention program is 80% effective at reducing smoking among participants. If 10 individuals enroll in the program, what is the probability that exactly 8 of them successfully reduce smoking?

What is the negative predictive value (NPV) for the following screening test?Affected UnaffectedPositive 25975Negative 58,995

In an effort to better understand global access to primary healthcare services, an international organization collected data from several countries. Individuals were asked to categorize their access as adequate or inadequate.CountryAdequate Inadequate AccessAustralia 2,700300India 3,600900Italy 2,100400South Africa 1,800600What is the probability that a randomly selected individual from Australia has adequate access to primary healthcare services?

In a normal distribution, most values cluster around the center of the distribution.

A 99% confidence interval for average blood pressure is reported as 110 to 130 mmHg. Which interpretation is correct?

The probability that a college student gets fewer than 7 hours of sleep on a school night is 38%. A health researcher surveys 8 college students. What is the probability that fewer than 3 students got fewer than 7 hours of sleep?Write down the correct formula to use and show work Solve Explain in words the results

Systolic blood pressure in adults follows a normal distribution with μ = 120 μ=120 and σ = 10 σ=10. What is the 95th percentile of systolic blood pressure?

A cumulative probability of 0.9332 corresponds to which Z-score?

A study was conducted to examine the effect of reducing screen time before bed on sleep duration among college students. Students followed their usual routine for one week and then reduced their screen time before bed for one week. The difference in hours of sleep (reduced screen time week – usual routine week) was recorded.The sample (n = 400 ) had a mean increase in sleep of 0.8 hours with a standard deviation of 1.2 hours.Construct a 95% confidence interval for the mean difference in hours of sleep.Interpret the confidence interval in words.Is there evidence that reducing screen time before bed is effective? Explain.Would you recommend this intervention based on these results? Why or why not?*Show work to receive full credit. This includes writing the correct formula, plugging in the values, and solving.