The average cost was 405 with a standard deviation of 80., Ask an Expert

Statistics

At a certain university, the average cost of books per student was $380 per student last semester. In a sample of 55 students this semester, their average cost was $405 with a standard deviation of $80. The Dean of Students believes that the costs are greater this semester. What is the test value for this hypothesis?

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9113710

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

A researcher records the following number of birdcalls made

A researcher records the following number of birdcalls made during an experimental session with robins: 8.4 0.9 (M SD). Assuming these data are normally distributed, what is the probability that robins made more than 11 ...

In an effort to check the quality of their cellnbspphones a

In an effort to check the quality of their cell? phones, a manufacturing manager decides to take a random sample of 10 cell phones from? yesterday's production? run, which produced cell phones with serial numbers ranging ...

Confidence intervals ci are one of the simpler forms of

Confidence intervals (CI) are one of the simpler forms of inferential statistics. What does the CI represent? And why does our knowledge of the Central Limit Theorem (CLT) and the empirical rule let us understand why the ...

Determine the sample size n needed to construct a 99

Determine the sample size n needed to construct a 99?% confidence interval to estimate the population mean when σ=24 and the margin of error equals 9.

Why are scattered plots necessary when investigating the

Why are scattered plots necessary when investigating the relationship between quantitative variables?

The contents of a particular bottle of shampoo marked as

The contents of a particular bottle of shampoo marked as 150 ml are found to be 153 ml at an average, with a standard deviation of 2.5 ml. What proportion of shampoo bottles contain less than the marked quantity? Assume ...

Suppose that for a given patient the true ef is 63 consider

Suppose that, for a given patient, the true EF is 63. Consider the population of EF values that can be estimated on that patient using option II above. That population follows a normal distribution with μ= 63. Find the p ...

Question 1below you are given the examination scores of 20

Question 1 Below you are given the examination scores of 20 students (data set also provided in accompanying MS Excel file). 52 99 92 86 84 63 72 76 95 88 92 58 65 79 80 90 75 74 56 99 a. Construct a frequency distributi ...

1 a stock market analyst is able to 1. A stock market analyst is able to

1. A stock market analyst is able to identify mis-priced stocks by comparing the average price for the last 10 days to the average price for the last 60 days. If this is true, what do you know about the market's efficien ...

Bob millers long-term financial goal is to retire

Bob Miller's long-term financial goal is to retire comfortably in 23 years at age 65. You have conducted a robust risk profile analysis on him and have determined that he is an aggressive investor. Miller insisted on all ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Statistics and Probability Expert