There (Choose one) venough evidence to conclude that the mean FICO score is more than the cutoff of 720. is is not

In a random sample of ten cell phones, the mean full retail price was $554.00 and the standard deviation was $167.00. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 95% confidence interval for the population mean u. Interpret the results. Identify the margin of error. (Round to one decimal place as needed.)

A meteorologist wants to know how the current year's amount of snowfall has compared to previous years average snowfalls. The average snowfall is 9 inches per year with a standard error of the mean of 1 inch, and this year’s current snowfall was 9. Compute the one-sample t-test using these data. Please answer using whole numbers only.

USA TODAYT reported that Americans spend 4.1 hours per weekday checking work email. This was an estimate based on a survey of 1,004 white-collar workers in the United States. n USE SALT (a) Suppose that you would like to know if there is evidence that the mean time spent checking work email for white-collar workers in the United States is more than half of the 8-hour work day. What would you need to assume about the sample in order to use the given sample data to answer this question? (Select all that apply.) O we would need to assume that the distribution of the population of times is normal or that the sample size is small. O we would need to assume that all observations are dependent or all observations are independent. O we would need to assume that the distribution of the population of times is not normal or that the sample size is small. O we would need to assume that all white-collar workers were surveyed or the sample is representative of the population of white-collar workers…

What is the mean amount of money a random 100 students spend if the mean amount they spend on books is more than 97.5%?(show work)

What is mean Z-score = 1.9736?

A study was conducted to examine how anxiety (measured on a metric scale) varies for people from different age groups (<18 years, 19 - 29 years, 30 - 39 years, 40+ years). It was hypothesised that people <18 years old would have the least anxiety of the four age groups. It was also hypothesised that people 40+ years old would have more anxiety than people 19-29 years old. Which of the following would be an appropriate statistical test to conduct, which addresses these hypotheses? Group of answer choices: Factorial ANOVA Multiple Regression Mixed ANOVA Single factor ANOVA Within Subjects ANOVA

State the null and alternative hypothesis if I claim that the mean lifespan of African elephants is 59 or less.

The mean number of hours that Raphael worked over the past four weeks is 36.75. If he works 39 hours this​ week, what will the mean number of hours be that he will have worked over the​ five-week period?   What is the​ five-week mean?