Blog

Use the Central Limit Theorem to find the mean and standard error of the mean of the indicated sampling distribution. [4 Points] 3) The amounts of time employees of a telecommunications company have worked for the company are normally distributed with a mean of 5.4 years and a standard deviation of 2.1 years. Random samples of size 12 are drawn from the population and the mean of each sample is determined.

Provide the continuity correction. [2 Points] 6) Ten percent of the population is left-handed. A class of 5350 students is selected. Convert the binomial probability P(x ≤ 22) to a normal probability by using the correction for continuity.

Determine the formula mass for Tin (III) oxide an imaginary compound. (Enter your answer with 4  sig figs and no units).

What’s the name of the equipment shown below?  

Calculate. [5 Points] 9) Find the margin of error for the given values of c, σ, and n. c = 0.90 , σ = 11.5 , n = 120

Which of the following drugs is a H2RA?   

How many milliliters of 0.179 M Ba(OH)2 are required to neutralize 20.00 mL of 0.392 M HCl, according to the reaction below? 2 HCl (aq) + Ba(OH)2 (aq)  →  2 H2O (l) + BaCl2 (aq)

The structure of doxylamine is shown below:   doxylamine a) What is the main use of this drug, and what is its drug target for this use? (1 mark) b) What key side effects does doxylamine produce, and how has this been useful in treating another condition? (1 mark) c) Why is this side-effect seen, from a chemical and biochemical perspective? (1 mark) d) It was desirable to produce other compounds to target the main use without this side effect. How did chemists achieve this? (1 mark) e) State the name of a drug that fulfils the criteria for part (d). (1 mark)

Construct the appropriate confidence interval. [10 Points] 11) In a random sample of 60 computers, the mean repair cost was $150. Assume the population standard deviation is $36. a) Construct the 99% confidence interval for the population mean repair cost. b) If the level of confidence was lowered to 95%, what will be the effect on the confidence interval?

Which of the following bacteria is NOT usually associated with COPD?