Blog

500 women were randomly selected for an interview about attitudes and sexual behaviors. One of the questions from the interview asked “How many sexual partners have you had?”   Which is the most likely type of non-sampling error for this interview question?

  A researcher studying a group of individuals of the same species living and interacting in a shared environment is said to be working at the level of a  

Use this set-up for Problems 19-21: You choose to park your car in a metered parking spot where the cost of parking for 1 hour is $1.50. The cost of a parking ticket is $15. Historically, the local police only catch one out of every 12 parking violators in a given hour. You are trying to determine if it’s worth paying the meter or if you’d be better off to not pay the meter and just take your chances of getting a parking ticket. Complete the probability table below, under the assumption that you do NOT pay the parking meter. (In other words, the two rows of the table represent the two outcomes–you park for free or you have to pay a parking ticket) Payment Probability _______ ________ _______ ________   Calculate the expected value of your payment in this situation.

This xray is most consistent with:  

If a bottle of perfume were spilled in the corner of a large lecture hall, the students sitting near that corner of the room would very quickly smell the perfume. Over time, the students sitting in the far corner of the room would smell the perfume. What phenomenon will have occurred to the perfume molecules that have entered the air?

Ribosomes are very small non-membranous structures that can either exist freely in the cytoplasm or be embedded in the rough endoplasmic reticulum of a cell. They are associated with the synthesis of

1.       A 51 yo white male is being evaluated in the hospital for acute renal failure in the setting of pneumonia.  Pt initially was quite sick and met criteria for sepsis with BP 78/40, HR 130 and temp of 102.3F.  Pt improved rapidly with aggressive fluid resuscitation.  A CT scan of chest was done to rule out PE- it was negative.  His laboratory trend:   2 days ago 1 day ago today creatinine 0.85 1.1 1.4 BUN 14 23 27 Sodium 137 135         133   Urinalysis is sent- It shows SG 1.015, no protein or blood, no LE or nitrates. There are muddy brown casts.   Urine osmolarity is 410.  Urine sodium is 48.  Urine creatinine is 48. Urine urea is 400.   What is the likely cause of patient’s renal failure?

A protein molecule, transferrin, that is embedded in the plasma membrane recognizes iron molecules and causes the plasma membrane to fold in around the iron and take it into the cell. This is an example of

Use this set-up for Problems 57-59: During Fall 2020, 32% of the entire 3,839 admitted freshman students at UMSL had graduated high school in the top 10% of their class. Suppose a simple random sample of 136 admitted freshman was taken during that fall.   What is the probability that more than 1/4 of the students in the sample graduated in the top 10% of their high school class? Fill in the missing blanks with the appropriate intermediate steps:   Blank A:

As shown in the following figure, the highest concentration of free hydrogen ions is found in