A researcher wants to estimate the mean blood cholesterol level of young men ages 15-25 with a 83.56% confidence interval. The blood cholesterol level of young men follows a Normal distribution with standard deviation σσ = 35 mg/dl. How large a sample would the researcher need to take to estimate the mean blood cholesterol to within 9 mg/dl? A sample of at least _____ people.

Pyramid Lake is on the Paiute Indian Reservation in Nevada. The lake is famous for cutthroat trout. Suppose a friend tells you that the average length of trout caught in Pyramid Lake is μ = 19 inches. However, a survey reported that of a random sample of 51 fish caught, the mean length was x = 18.4 inches, with estimated standard deviation s = 3.5 inches. Do these data indicate that the average length of a trout caught in Pyramid Lake is less than μ = 19 inches? Use α = 0.05. (a) What is the level of significance? State the null and alternate hypotheses. Ho: 19 in Ho: M = 19 in; H₁: μ # 19 in 1 Ho: M = 19 in; H₁: μ 19 in; H₁: μ = 19 in (b) What sampling distribution will you use? Explain the rationale for your choice of sampling distribution. The Student's t, since the sample size is large and o is unknown. The Student's t, since the sample size is large and σ is known. The standard normal, since the sample size is large and σ is known. The standard normal, since the sample size is…

you Created a survey that meawere Depression In people. you want to test the Claim that the Mean. meusurements of Depression that peaple have is not egued to 6.5. A sample. of 145 Of you patients had a mean depression measurement of X=6.7 and a standard deviation of l,5.

The annual per capita consumption of oranges (in pounds) in the United States  can be approximated by a normal distribution. The mean annual per capita  of oranges is 19.2 with a standard deviation of 4 pounds.  what annual per capita consumption of oranges represents the 5th percentile?