The failure rate in a statistics class is 20%. In a class of 50 students, find the probability that less than eight students will fail. Pleaseeeee I need HELPPPP

The failure rate in a statistics class is 20%. In a class of 50 students, find the probability that less than eight students will fail. Pleaseeeee I need HELPPPP

The result of an exam score for a given class is normally distributed.

I am in a bsic statistics class. need help solving the word problems

A psychologist is interested in the mean IQ score of a given group of children. It is known that the IQ scores of the group have a standard deviation of 16. The psychologist randomly selects...

In 2004, a random sample of 46 coyotes in a region of northern Minnesota showed an average age to be 2.05 years with a standard deviation of 0.82 years. However, it is thought that the overall population...

Record temperatures in July are {96,95,97,100,100,98,99,100,99,95} Mean: 97.9 Variance: 4.1 Standard Deviation: 2.02485 I am having difficulty with figuring out standard deviations...

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with mean 1252 and standard deviation 129 chips. (a) What is the probability that...

The mean incubation time for a type of fertilized egg kept at 100.7°F is 19 days. Suppose that the incubation times are approximately normally distributed with a standard deviation of 2 days. (a)...

What is the probability that a randomly selected pregnancy lasts less than 224 days? 0.358 *What is the probability that a random sample of 21 pregnancies has a mean gestation period...

What is the probability that a randomly selected pregnancy lasts less than 224 days?

In a survey amongst freshmen at StudyMore College, the average number of hours spent studying for their math class was 15.4 hours per week with a standard deviation of 2.65. Assuming the population...

A battery pack manufacturer claims their product will run two cell phones playing Pokemon go an average of 12 hours with a standard deviation of 2.4 hours. A random sample of 40 battery packs is tested...

Could someone tell me please what is the correct answer to this question? The alternative hypothesis is best explained as: • A prediction that the sample statistic is false • The test...

i'm just confused

a normal distribution has a mean of 100 with standard deviation of 20. If one score is randomly selected from this distribution, what is the probability that the score will have a value between x=90...

Which statistical test should I use to see if there is a difference in employment vs unemployment between two surveys one from May and one from June (with different respondents and different numbers...

I'm currently writing a statistics paper based on this study: http://www.environmentnewjersey.org/programs/nje/no-bees-no-food I need to find the explanatory variable, the response...

Are you more likely to make a Type I error when using a large sample or a small sample?

I solve the range which is 23

For the dinner special at a restaurant, the customer must choose an appetizer, an entree, a side dish, and a dessert. Here are the items to choose from. How many dinner specials are possible...