pls help me with this statistics question asap
The amount oftime that a drivethrough bankteller spends on a customer is a random van'able with a mean p: 8.8 minutes and a standard deviation or: 4.5 minutes. It a random sample ofB1 ulstomers is observed, nd the probability that their mean time at the tellers window is {a} at most 18 minutes; in} more than 9.4 minutes; (1:) at least 3.8 minutes but less than 9.? minutes. Click here to View page 1 of the standard normal distribution table. Click here to View page 2 of the standard normal distribution table. (a) The probability that the mean time is at most 38 minutes is (Round to four decimal places as needed.) (b) The probabilityr that the mean time is more than 9.4 minutes is (Round to four decimal places as needed.) (c) The probability that the mean time is between 3.8 minutes and 9.? minutes is (Round to four decimal places as needed.) \fStandard Normal Distribution Table (Page 2) Areas under the Normal Curve .00 .01 .02 103 .04 105 .0 OT 109 0.0 0.5000 0.5040 0.5080 0.5120 0.5160 0.5199 0.5239 0.5279 0.5319 0.5359 0.1 0.5398 0.5438 0.5478 0.5517 0.5657 0.5506 0.5036 0.5675 0.5714 0.5753 0.1 0.2 0.5703 0.5832 0.5871 0.5010 0.5048 0.5087 0.6026 0.6064 0.6103 0.6141 0.2 0.3 0.6179 0.6217 0.6265 0.6293 0.6331 0.6368 0.6 406 0.0443 0.6430 0.0617 0.3 0.4 0.6554 0.6591 0.6028 0.6664 0.0700 0.0736 0.0772 0.0808 0.6844 0.6879 0.4 0.5 0.6915 0.6950 0.6985 0.7019 0.7054 0.7088 0.7123 0.7157 0.7190 0.7224 0.5 0.6 0.7257 0.7291 0.7324 0.7357 0.7389 0.7422 0.7454 0.7486 0.7517 0.7549 0.6 0.7 0.7580 0.7611 0.7642 0.7673 0.7704 0.7734 0.7764 0.7704 0.7823 0.7852 0.7 0.8 0.7881 0.7910 0.7939 0.7967 0.7995 0.8023 0.8061 0.8078 0.8106 0.8133 D.8 0.9 0.8159 0.8186 0.8212 0.8238 0.8264 0.8289 0.8315 0.8340 0.8365 0.8389 0.9 1.0 0.8413 0.8438 0.8461 0.8485 0.8508 0.8531 0.8554 0.8577 0.8509 0.8621 1.0 1.1 0.8643 0.8665 0.8686 0.8708 0.8729 0.8749 0.8770 0.8790 0.8810 0.8830 1.1 1.2 0.8849 0.8869 0.8888 0.8907 0.8925 0.2014 0.8062 0.8080 0.8007 0.9015 1.2 1.2 0.9032 0.9040 0.00GG 0.0092 0.0090 0.0115 0.0131 0.0147 0.0162 0.0177 1.2 1.4 0.9192 0.9207 0.9222 0.9230 0.9251 0.9265 0.9279 0.9292 0.9306 0.9319 1.4 1.5 0.9332 0.9345 0.9357 0.9370 0.9382 0.9394 0.9406 0.9418 0.9429 0.9441 1.5 1.6 0.9452 0.9463 0.9474 0.9484 0.9495 0.9505 0.9515 0.9525 0.9535 0.9545 1.6 1.7 0.9554 0.9564 0.9573 0.9582 0.9591 0.9509 0.06IS 0.9616 0.0625 0.0633 1.7 1.8 0.9041 0.0640 0.0650 0.9064 0.0671 0.0678 0.0096 0.0803 0.0.030 0.0706 1.8 1.9 0.9713 0.9719 0.9726 0.9732 0.9738 0.9744 0.9750 0.9756 0.9701 0.9707 1.0 1 0.9712 0.9778 0.9783 0.9788 0.9793 0.9798 0.9803 0.9808 0,9812 0.9817 2.0 2.1 0.9821 0.9826 0.9830 0.9834 0.9838 0.9842 0.9846 0.9850 0.9854 0.9857 2.1 2.2 0.0861 0.9864 0.0868 0.0871 0.0875 0.0878 0.0881 0.0884 0.0887 0.0800 2.2 2.3 0.0803 0.1806 0.0808 0.9001 0.9004 0.9006 0.9009 0.901 1 0.0013 0.9016 2.3 2.4 0.0918 0.0920 0.0922 0.9025 0.9027 0.0920 0.0931 0.9032 0.0934 0.9036 2.4 2.5 0.9938 0.9940 0.9941 0.9943 0.9945 0.9946 0.9948 0.9949 0.9951 0.9952 2.5 2.6 0.9953 0.9955 0.9956 0.9957 0.9959 0.9960 0.9961 0.9962 0.9963 0.9964 2.6 2.7 0.9965 0.0966 0.9967 0.9068 0.9969 0.9970 0.9971 0.9072 0.9973 0.9974 2.7 2.8 0.0074 0.0075 0.9076 0.9077 0.9077 0.9078 0.0970 0.0070 0.0080 0.0081 2.8 2.0 0.0981 0.0082 0.9032 0.0983 0.9084 0.9984 0.9985 0.9085 0.9036 0.9036 2.0 3.0 0.9987 0.9987 0.9987 0.9988 0.9988 0.9989 0.9989 0.9989 0.9990 0.9990 3.0 3.1 0.9990 0.9991 0.9091 0.9991 0.9992 0.9992 70650 0.9092 0.9903 0.9903 3.1 3.2 0.9993 0.0993 0.9094 0.9094 0.9094 0.9904 0.9934 0.9095 0.9095 0.9905 3.2 3.3 0.9095 0.0095 0.9005 0.9090 0.9096 0.0006 0.9006 0.ODDG 0.0007 3.3 3.4 0.0997 0.0097 0.9097 0.0907 0.0097 0.0907 0.9007 0.9017 0.0907 34 .00 .01 02 03 .04 07 08
