An article reports that young adults from a certain city spend an average of more than $150 a week on food. To test this claim, Eric, a college student who resides in the city, selects a representative sample of 55 young adults. He calculates the sample mean to be $156.45 with a sample standard deviation of $26.62. If the test statistic is t 1.80 and the alternative hypothesis is Ha : 150, what is the p-value range for the appropriate hypothesis test? Values for right-tail areas under the t-distribution curve 0.01 Probability Degrees of Freedom 50 51 52 53 54 0.10 0.05 0.025 0.005 1.299 1.298 1.298 1.298 1.297 1.297 1.297 1.297 1.296 1.296 1.676 1.675 1.675 1.674 1.674 1.673 1.673 1.672 1.672 1.671 2.009 2.008 2.007 2.006 2.005 2.004 2.003 2.002 2.002 2.001 2.403 2.402 2.400 2.399 2.397 2.396 2.395 2.394 2.392 2.391 2.678 2.676 2.674 2.672 2.670 2.668 2.667 2.665 2.663 2.662 56 57 58 59

In a survey of 1,500 high school students, 79% do not get an average of 8 hours of sleep. What is the approximate standard error for the population who do not get an average of 8 hours of sleep?* 0.0003 0.0118 0.0105 0.8885

My class intervals were 4.5-4.4, 4.4-4.5, 4.5-4.6, 4.6-4.7, 4.7-4.8, 4.8-4.9 Is this not correct?

40 Vegas residents were asked whether they prefer to shop locally or gor to the mall.  29 of them said they prefer to shop locally.  What is the percent margin of error for the proportion of Vegas residents who prefer to shop locally? (1-p) =    (round to three decimal places) Error in decimal form =   (round to three decimal places) Error in percent form =   (round to the nearest tenth of a percent)

Exercise 9-22 Algo It is advertised that the average braking distance for a small car traveling at 65 miles per hour equals 120 feet. A transportation researcher wants to determine if the statement made in the advertisement is false. She randomly test drives 37 small cars at 65 miles per hour and records the braking distance. The sample average braking distance is computed as 111 feet. Assume that the population standard deviation is 21 feet. (You may find it useful to reference the appropriate table: z table or t table) a. State the null and the alternative hypotheses for the test O Hg: H - 120; HA: p + 120 O Hg: P z 120; HẠ: P 120 b. Calculate the value of the test statistic and the p-value. (Negative value should be indicated by a minus sign. Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.) Test statistic 5 of 12 ! Next > - search prt sc home 144 2$ & 6 9 T Y U enter F G J K L pause C V alt ctri

what is the measure of <C?

Please show the full solution and proper notation and terminology. 1. A production manager wants to estimate the proportion of defective parts received from a new supplier. She believes that defective proportion is no more than 0.20 and wants to be within 0.02 of the true proportion of defective parts with 90% level of confidence. How large a sample should she take?  thanks.

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