25-04-2024
Mathematics

Answered

SAT scores. At CSLA, the SAT scores of entering students have had a mean of 950 (for the critical reading and mathematics portions). Each year a sample of applications is taken to see whether the examination scores are at the same level as in previous years. A sample of 169 students in this year's class had a sample mean score of 980. Assume the population standard deviation is known and equal to 150. a) Test the null hypothesis : against a two-sided alternative : μ = 950 hypothesis using the critical value approach. Use a 0.05 level of significance. b) Calculate the p-value using a 0.05 level of significance.

Answer :

Other Questions

A random sample of 11 technicians produced the following data, where x is the number of tasks assigned, and y is the number incomplete tasks at the end of the f

At the beginning of a recent year, my company’s Liabilities equalled 32,940,000 dollars. During the year assets increased by 6,411,000, and the year-end equalle

Suppose varies jointly with the square of and the cube root of . If it is known that = 180 when = 3 and = 64, what is the value of when = 6 and = 8?

Several years ago, 49% of parents who had children in grades K-12 were satisfied with the quality of education the students receive. A recent poll asked 1 co

A printing press that costs $ 285 comma 500 is depreciated using the 1.5 declining-balance method. The scrap value of the press is estimated to be $ 4 comma 00

One question asked was, "Do you favor allowing women to be priests?" to which 55% of the respondents answered yes. Using the reported margin of error of 4.4%, c

QU 1.1 Masakhane community purchased a UHD digital television from furniture store on hire purchase. The hire purchase agreement is shown below. ACCOUNT NUMBER,

Assuming all other factors stay the same, what happens to the proportion of the data in both tails as the degrees of freedom increases with a t statistic is? a

The dot plots show the ages, in years, of people watching two movies at a local theater. Find the median age of the people who watched each movie.

the function f is continuous for all real numbers, and the average rate of change for f on the closed interval [6,9] is -3/2. For 6